US3679264A - Geothermal in situ mining and retorting system - Google Patents
Geothermal in situ mining and retorting system Download PDFInfo
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- US3679264A US3679264A US868395A US3679264DA US3679264A US 3679264 A US3679264 A US 3679264A US 868395 A US868395 A US 868395A US 3679264D A US3679264D A US 3679264DA US 3679264 A US3679264 A US 3679264A
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- 238000011065 in-situ storage Methods 0.000 title abstract description 17
- 238000005065 mining Methods 0.000 title description 14
- 239000012530 fluid Substances 0.000 claims abstract description 37
- 239000003921 oil Substances 0.000 claims abstract description 37
- 239000002184 metal Substances 0.000 claims abstract description 25
- 229910052751 metal Inorganic materials 0.000 claims abstract description 25
- 239000000126 substance Substances 0.000 claims abstract description 23
- 238000011084 recovery Methods 0.000 claims abstract description 22
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 21
- 239000011707 mineral Substances 0.000 claims abstract description 21
- 150000002739 metals Chemical class 0.000 claims abstract description 16
- 239000007789 gas Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 230000015572 biosynthetic process Effects 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 238000005553 drilling Methods 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000005755 formation reaction Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000010795 Steam Flooding Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000000779 depleting effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 230000029052 metamorphosis Effects 0.000 description 1
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- 231100000719 pollutant Toxicity 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/28—Dissolving minerals other than hydrocarbons, e.g. by an alkaline or acid leaching agent
- E21B43/281—Dissolving minerals other than hydrocarbons, e.g. by an alkaline or acid leaching agent using heat
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
Definitions
- ABSTRACT The following disclosure relates to a system for the recovery of minerals, metals, and chemicals in situ by the utilization of geothermal heat energy which is transferred from one stratum or zone within the interior depths of the earth into another stratum or zone in the earth's interior, which contains minerals, oil, metals, or chemicals whose recovery is enhanced by coming in contact with the invading heat energy, and is accomplished by a closed system which permits the escape of high pressure geothermally heated gas or fluid from the one subsurface zone within the earth into the other subsurface zone within the earth.
- a fluid may be injected into the geothermal zone, heated therein, transferred into the other zone, and the fluidized body of material from the other zone recovered through a second well.
- the present invention relates to the utilization of geothermal heat energy for the recovery of oil, minerals, metals, and chemicals which can be more efiiciently mined or produced by coming in contact with increased temperatures and pressures that serve to increase viscosities, create solutions, and enhance recovery.
- the present invention relies upon the geothermal zones which exist within the interior depths of the earth and contains vast sources of heat energy resulting from the earths calorific production which is housed in formations at various depths within the earth.
- the present inventive system provides for the direct utilization of steam or hot liquid contained within the geothermal stratum under suflicient pressures to allow it to enter a perforated or slotted well casing, which has been enclosed in cement and inserted in a well bore drilled into the geothermal stratum from which steam and heated fluid can flow through the well casing to and into another stratum penetrated by the same well bore and casing where entry is permitted through perforations or slots at such stratum.
- the present inventive system utilizes geothermally heated zones or formations which do not contain moisture or gas sufficient to effect the desired heat transfer from one stratum to another by employing a system through which water or other suitable fluids or materials can be injected into the geothermal stratum through this inventive system and after it is geothermally heatedcan return into the well casing through perforations or slots in the well casing and thence into the desired stratum for in situ mining or retort utilization.
- this inventive system embodies the utilization of the bottom portion of the well casing which has been submerged into a geothermal stratum and into which fluid is injected which will absorb heat energy from the surrounding geothermal stratum and after it has attained sufficient heat and pressure will flow through the well casing into the stratum which surrounds the perforations or slots made for its escape into the desired zone.
- the top portion of the well casing being closed at the surface of the well restrains the flow of the geothermally heated gas or fluids and thus permits the guaging of volumes and pressures rising within the inventive system by recording guages at the well head and permits escaping into the stratum selected for in situ retorting.
- This aspect of the inventive system also permits a controlled escape of geothermal fluids or geothermally heated fluids through control valves located at the well head which, when open, will tend to encourage flow from the geothermal stratum and also permit utilization of the geothermal energy at the wells surface when desired.
- geothermal in situ mining and retorting system of the invention is peculiarly adaptable to a novel method of oil and gas recovery where pressures are required and where oil is waxy and/or viscous, and flows with difficulty at ambient formation temperatures.
- the present invention proposes to exploit many important mineral deposits in the United States that are too deeply buried to pennit open-pit mining or exist in a state of viscosity and in an environment of low ambient temperatures which prohibit their economical production with present-day technology.
- Another method in this so-called secondary recovery method of producing depleted oil wells is a method of steam-flooding, wherein water is heated to steam at a well's surface and then injected into the oil stratum to create the increased oil production.
- This method involved the consumption of one energyproducing substance in order to. produce another.
- Other methods attempted to promote secondary oil recovery included the emplacement of heating elements within well bores adjacent to oil strata, injection of chemical solutions, fireflooding, and more recently, the explosion of nuclear devices.
- the present invention proposes the capture and utilization of the earth's native heat energy for such vital projects as oil recovery, mineral recovery, chemical recovery, metal recovery, and in situ water recovery.
- the system of this invention permits the capture of heat energy from the depths within the earth and the'removal of such captured heat energy into preselected strata or zones where its heat will serve to assist the recovery of oil, minerals, chemicals, metals, or water that may be contained in the preselected stratum or zone.
- One distinct advantage of this invention is the unlimited quantity of heat that exists within the depths of the earth, reachable by present-day oil drilling technology.
- geothermal strata within the earth contain sufiicient heat volumes and pressures to permit the invasion of most oil, mineral, chemical, metal, and water strata when communication between a geothermal zone and such product-containing zone is permitted as described herein (in the specification and drawings).
- FIG. I is a schematic view showing how communication is established between two zones in a well where steam and/or hot water from one zone can escape from its habitat through perforations made through the well casing and into the stratum formation and after entering the well casing the steam or hot water is able to flow to another zone where similar perforations allow its entry to promote in situ mining or retorting of minerals, chemicals, or metals which may be contained therein.
- FIG. 2 is a cross-sectional view of a well similar to FIG. 1 but adds the potential for injecting water or other fluids through a pipe conducted through the well casing and into the geothermal stratum which may contain sufiicient heat but lacks sufficient moisture.
- FIG. 3 is a cross-sectional view of a well similar to FIG. 1 and FIG. 2 and contains no perforations in that portion of the well which extends into a geothermal stratum but uses that portion of the well as a fluid reservoir which will absorb heat energy by exchange from the surrounding formation and after attaining sufficient pressure will flow into the perforated mineral, metal, or chemical zone.
- the system of this embodiment includes a metal well casing 2 which has been inserted into a well drilled into the earth into a geothermal stratum 11 and the well casing 2 has been surrounded with cement l and sealed with a plug 3 at the bottom.
- perforations 4 have been made through the well casing 2 and the surrounding cement l and penetrating the adjacent geothermal stratum 11 which will permit the escape of steam and/or hot water from the geothermal stratum 11 through the perforations 4 and into the well casing 2.
- the heated geothermal fluids which have entered the well casing 2 will now rise up the well casing 2 filling the entire well casing 2 and pass through pipe 9 and valve 8 until a continuous strong production is maintained from the geothermal stratum 11 into the well casing 2 as measured by gauge 7 for temperature and pressure, located above the well 's cap 6.
- valve 8 is partially or completely closed to permit the heated gas or fluids from the geothermal stratum 11 to enter perforations and the formation 10 where in situ mining or retorting of contained oil, gas, other minerals, chemicals, and metals may occur. Through other wells not shown which penetrate the formation 10, the oil, gas, and other products are subsequently recovered.
- FIG. 2 illustrates the preferred closed system with auxiliary equipment such as the fluid injection pipe 12 and a bottomhole plug 3 which surrounds the fluid injection pipe 12 completely sealing the metal well casing 2 at the wells bottom.
- This embodiment of the inventive system contains a pump 13 to inject fluid under pressure into the geothermal stratum 11 as required.
- the steam or hot water enters the well casing 12 through perforations 4 and rises in the well casing 2 to invade the mineralized stratum 10 by passing through the perforations 5 made through the well casing 2, the cement l, and penetrating the mineralized stratum 10.
- Pressure and temperature of the steam or hot fluid within the well casing 2 is measured by gauge 7.
- the valve 8 in line 9 maintains a high pressure within casing 2 when the valve is partially or completely closed.
- this method of in situ retorting within a mineralized stratum 10 would serve to utilize geothermal stratum 11 which may contain excessive contaminants or lack moisture but possess sufficient heat.
- This method excludes the perforations 4 and depends upon a sufiicient heat exchange to be accomplished to effect heating of the fluid 14 to sufficient temperature to effect its rise and entry into perforations 5 and the mineralized stratum l0. 1
- Recent technology in drilling large diameter wells into the earth provides a means to effect large reservoirs of fluids l4 and large areas of heat exchange surfaces on the well casing 2 which is submerged into geothermal stratum ll.
- temperatures within the earth increase with depth at a rate of approximately 3 C. for each 328 feet of depth.
- abnormal increases over this mean occur in many instances because of faulting, volcanism, metamorphosis, chemical, and radiological activities.
- All oil and gas fields are related to entrapments which are related to faults and such faults are rich sources of geothermal heat energy.
- deep-seated faults contain excessive temperatures. At some depth beneath every square mile of the earth's surface lies a vast store of geothermal heat energy which can, in many instances, be put to work for in situ mining or retortmg.
- geothermal zones various, more extensive communication methods between geothermal zones and other zones may become obvious, such as mining the geothermal fluids from one well and returning it into another well and into a different zone.
- a producing well spaced laterally from said first well bore having a lower, open end disposed within said stratum and an upper end communicating with the surface for transferring said fluidized body to the surface for recovery of said material.
- a system according to claim 1 further including outlet means containing a valve connected to said casing above the surface for flowing said well at the surface of the earth.
- a system according to claim 1 further comprising a cement layer surrounding and engaging said plug and the exterior of the casing below the surface of the earth and said layer containing said perforations and an aperture for receiving said pipe.
- a method for recovering a material selected from oil, gas, minerals, chemicals, metals and the like from a geological formation including a subsurface stratum containing at least one of said materials and a lower, dry, geothermal zone having an abundant reservoir of heat and a natural temperature substantially above the temperature of the stratum comprising the steps of:
Abstract
The following disclosure relates to a system for the recovery of minerals, metals, and chemicals in situ by the utilization of geothermal heat energy which is transferred from one stratum or zone within the interior depths of the earth into another stratum or zone in the earth''s interior, which contains minerals, oil, metals, or chemicals whose recovery is enhanced by coming in contact with the invading heat energy, and is accomplished by a closed system which permits the escape of high pressure geothermally heated gas or fluid from the one subsurface zone within the earth into the other subsurface zone within the earth. Alternatively a fluid may be injected into the geothermal zone, heated therein, transferred into the other zone, and the fluidized body of material from the other zone recovered through a second well.
Description
United States Patent Van Huisen [54] GEOTHERMAL IN SITU MINING AND RETORTING SYSTEM [72] Inventor: Allen T. Van llulsen, 1516 Granvia Altamira, Palos Verdes Estates, Calif. 90274 [22] Filed: Oct. 22, 1969 [21] Appl. No.: 868,395
[ 51 July 25,1972
3,430,700 3/1969 Satter et al 166/263 X 3,432,205 3/1969 l-lottman et al. ..166/272 X FOREIGN PATENTS OR APPLICATIONS 1,414,837 9/1965 France ..166/302 Primary Examiner-Jan A. Calvert Attorney-Marvin E. Jacobs [5 7] ABSTRACT The following disclosure relates to a system for the recovery of minerals, metals, and chemicals in situ by the utilization of geothermal heat energy which is transferred from one stratum or zone within the interior depths of the earth into another stratum or zone in the earth's interior, which contains minerals, oil, metals, or chemicals whose recovery is enhanced by coming in contact with the invading heat energy, and is accomplished by a closed system which permits the escape of high pressure geothermally heated gas or fluid from the one subsurface zone within the earth into the other subsurface zone within the earth. Alternatively a fluid may be injected into the geothermal zone, heated therein, transferred into the other zone, and the fluidized body of material from the other zone recovered through a second well.
5 Claims, 3 Drawing Figures PATENTEDJULZB 1912 3.679 .264- sum 1 0F 3 INVENTOR.
ALLEN T. VAN HUISEN FIGI PATENTEDJULZS I912 3.679.264
ALLEN T. VAN HUISEN FIG. 2
PATENTEDJHL 25 m2 SHEEI 3 OF 3 INVENTOR.
ALLEN T. VAN HUISEN FIG. 5
GEOTIIERMAL IN SITU MINING AND RETORTING SYSTEM BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to the utilization of geothermal heat energy for the recovery of oil, minerals, metals, and chemicals which can be more efiiciently mined or produced by coming in contact with increased temperatures and pressures that serve to increase viscosities, create solutions, and enhance recovery.
Brief Summary of the Invention The present invention relies upon the geothermal zones which exist within the interior depths of the earth and contains vast sources of heat energy resulting from the earths calorific production which is housed in formations at various depths within the earth. In one of its aspects, the present inventive system provides for the direct utilization of steam or hot liquid contained within the geothermal stratum under suflicient pressures to allow it to enter a perforated or slotted well casing, which has been enclosed in cement and inserted in a well bore drilled into the geothermal stratum from which steam and heated fluid can flow through the well casing to and into another stratum penetrated by the same well bore and casing where entry is permitted through perforations or slots at such stratum. In another aspect, the present inventive system utilizes geothermally heated zones or formations which do not contain moisture or gas sufficient to effect the desired heat transfer from one stratum to another by employing a system through which water or other suitable fluids or materials can be injected into the geothermal stratum through this inventive system and after it is geothermally heatedcan return into the well casing through perforations or slots in the well casing and thence into the desired stratum for in situ mining or retort utilization. In another aspect, this inventive system embodies the utilization of the bottom portion of the well casing which has been submerged into a geothermal stratum and into which fluid is injected which will absorb heat energy from the surrounding geothermal stratum and after it has attained sufficient heat and pressure will flow through the well casing into the stratum which surrounds the perforations or slots made for its escape into the desired zone. The top portion of the well casing being closed at the surface of the well restrains the flow of the geothermally heated gas or fluids and thus permits the guaging of volumes and pressures rising within the inventive system by recording guages at the well head and permits escaping into the stratum selected for in situ retorting. This aspect of the inventive system also permits a controlled escape of geothermal fluids or geothermally heated fluids through control valves located at the well head which, when open, will tend to encourage flow from the geothermal stratum and also permit utilization of the geothermal energy at the wells surface when desired.
The geothermal in situ mining and retorting system of the invention is peculiarly adaptable to a novel method of oil and gas recovery where pressures are required and where oil is waxy and/or viscous, and flows with difficulty at ambient formation temperatures.
The present invention proposes to exploit many important mineral deposits in the United States that are too deeply buried to pennit open-pit mining or exist in a state of viscosity and in an environment of low ambient temperatures which prohibit their economical production with present-day technology.
Prior to recent conservation methods employed in the oil and gas producing industry, many oil fields were improperly produced to secure maximum potential production, with the result that only a fraction of the oil in place was produced and the remaining oil lacked sufficient gas pressure, ambient temperature, or viscosity to permit recovery by the then-existing production methods. As oil consumption increased and overtook new discovery replacement reserves, the oil producing industry returned to the dormant oil fields where in situ reserves challenged its ingenuity for innovation. To release in situ oil from such depleted oi] strata, a system of water-flooding was commenced that entailed the injection of water from the surface into the oil stratum where the oil rising above the injected water became available for pumping to the surface. Another method in this so-called secondary recovery method of producing depleted oil wells is a method of steam-flooding, wherein water is heated to steam at a well's surface and then injected into the oil stratum to create the increased oil production. This method involved the consumption of one energyproducing substance in order to. produce another. Other methods attempted to promote secondary oil recovery included the emplacement of heating elements within well bores adjacent to oil strata, injection of chemical solutions, fireflooding, and more recently, the explosion of nuclear devices.
Many of the methods devised for secondary oil recovery have economical or technological limitations that have become apparent by their application. In contrast, the present invention proposes the capture and utilization of the earth's native heat energy for such vital projects as oil recovery, mineral recovery, chemical recovery, metal recovery, and in situ water recovery. The system of this invention permits the capture of heat energy from the depths within the earth and the'removal of such captured heat energy into preselected strata or zones where its heat will serve to assist the recovery of oil, minerals, chemicals, metals, or water that may be contained in the preselected stratum or zone. One distinct advantage of this invention is the unlimited quantity of heat that exists within the depths of the earth, reachable by present-day oil drilling technology. Another distinct advantage is that geothermal strata within the earth contain sufiicient heat volumes and pressures to permit the invasion of most oil, mineral, chemical, metal, and water strata when communication between a geothermal zone and such product-containing zone is permitted as described herein (in the specification and drawings).
The advantages of the system, as compared to the prior art of mining, are apparent. Secondary recovery methods for depleting oil and gas fields have devised elaborate systems for steam-flooding to increase production and yield from depleting oil fields. In most cases, they consume the very product they are seeking to produce to create the steam for injection into the stratum. Pollutants that result from the consumption of fossil fuels which are used to create steam for such steamflooding projects, will not result from the use of this inventive system. Also, certain minerals, chemicals, and metals that are soluble in water and. temperature but are located too deep within the earth for conventional mining methods may become economical to extract with the use of this invention.
BRIEF DESCRIPTION OF THE DRAWINGS These and many other attendant advantages of the inventive system will readily be appreciated as they become better understood by reference to the following detailed description when considered in connection with the accompanying drawings in which:
FIG. I is a schematic view showing how communication is established between two zones in a well where steam and/or hot water from one zone can escape from its habitat through perforations made through the well casing and into the stratum formation and after entering the well casing the steam or hot water is able to flow to another zone where similar perforations allow its entry to promote in situ mining or retorting of minerals, chemicals, or metals which may be contained therein.
FIG. 2 is a cross-sectional view of a well similar to FIG. 1 but adds the potential for injecting water or other fluids through a pipe conducted through the well casing and into the geothermal stratum which may contain sufiicient heat but lacks sufficient moisture.
FIG. 3 is a cross-sectional view of a well similar to FIG. 1 and FIG. 2 and contains no perforations in that portion of the well which extends into a geothermal stratum but uses that portion of the well as a fluid reservoir which will absorb heat energy by exchange from the surrounding formation and after attaining sufficient pressure will flow into the perforated mineral, metal, or chemical zone.
Referring now to FIG. 1, the system of this embodiment includes a metal well casing 2 which has been inserted into a well drilled into the earth into a geothermal stratum 11 and the well casing 2 has been surrounded with cement l and sealed with a plug 3 at the bottom.
Above the plug 3 located at the lower extremity in the well casing 2, perforations 4 have been made through the well casing 2 and the surrounding cement l and penetrating the adjacent geothermal stratum 11 which will permit the escape of steam and/or hot water from the geothermal stratum 11 through the perforations 4 and into the well casing 2.
The heated geothermal fluids which have entered the well casing 2 will now rise up the well casing 2 filling the entire well casing 2 and pass through pipe 9 and valve 8 until a continuous strong production is maintained from the geothermal stratum 11 into the well casing 2 as measured by gauge 7 for temperature and pressure, located above the well 's cap 6.
After the desired temperature and pressure have been attained at gauge 7 the valve 8 is partially or completely closed to permit the heated gas or fluids from the geothermal stratum 11 to enter perforations and the formation 10 where in situ mining or retorting of contained oil, gas, other minerals, chemicals, and metals may occur. Through other wells not shown which penetrate the formation 10, the oil, gas, and other products are subsequently recovered.
FIG. 2 illustrates the preferred closed system with auxiliary equipment such as the fluid injection pipe 12 and a bottomhole plug 3 which surrounds the fluid injection pipe 12 completely sealing the metal well casing 2 at the wells bottom. This embodiment of the inventive system contains a pump 13 to inject fluid under pressure into the geothermal stratum 11 as required.
Referring now to the top of the well auxiliary equipment as shown in FIG. 2, there is both a fluid injection pipe 12 and a fluid withdrawal pipe 9 which permits adequate testing of gas or fluid in the well casing 2 prior to partial or complete closing of valve 8 located on the fluid withdrawal pipe 9.
Referring now to the fluid circuit as illustrated in FIG. 2, fluid enters the injection pipe 12, from a source not shown, passing through valve 8 and into pump 13 which controls the pressure of the fluid injected into the geothermal stratum 11. After being heated in the geothermal stratum 11 the steam or hot water enters the well casing 12 through perforations 4 and rises in the well casing 2 to invade the mineralized stratum 10 by passing through the perforations 5 made through the well casing 2, the cement l, and penetrating the mineralized stratum 10. Pressure and temperature of the steam or hot fluid within the well casing 2 is measured by gauge 7. The valve 8 in line 9 maintains a high pressure within casing 2 when the valve is partially or completely closed.
To initiate recovery of the oil, gas, minerals, chemicals, or metals after in situ retorting has been accomplished in the mineralized stratum 10, other conventional wells, such as a producing well extending from the surface into the stratum 10, would produce the products.
Referring now to FIG. 3, this method of in situ retorting within a mineralized stratum 10 would serve to utilize geothermal stratum 11 which may contain excessive contaminants or lack moisture but possess sufficient heat. This method excludes the perforations 4 and depends upon a sufiicient heat exchange to be accomplished to effect heating of the fluid 14 to sufficient temperature to effect its rise and entry into perforations 5 and the mineralized stratum l0. 1
Recent technology in drilling large diameter wells into the earth provides a means to effect large reservoirs of fluids l4 and large areas of heat exchange surfaces on the well casing 2 which is submerged into geothermal stratum ll.
With respect to the drilling of wells for in situ retorting of gas, oil, minerals, chemicals, or metals, temperatures within the earth increase with depth at a rate of approximately 3 C. for each 328 feet of depth. However, abnormal increases over this mean occur in many instances because of faulting, volcanism, metamorphosis, chemical, and radiological activities. All oil and gas fields are related to entrapments which are related to faults and such faults are rich sources of geothermal heat energy. It has also been noted in many deep wells drilled into the earth that deep-seated faults contain excessive temperatures. At some depth beneath every square mile of the earth's surface lies a vast store of geothermal heat energy which can, in many instances, be put to work for in situ mining or retortmg.
When it is desirable to discontinue the flow of geothermal gases or fluids into a preselected zone, it can easily be accomplished by employing conventional well remedial methods such as inserting packers, squeezing off zones, or cementing of well bores.
It is recognized that various, more extensive communication methods between geothermal zones and other zones may become obvious, such as mining the geothermal fluids from one well and returning it into another well and into a different zone.
The possibilities of utilization of this inventive system are infinite, and grandiose schemes are envisioned, such as repres surizing entire oil and gas fields, mining minerals, chemicals, and metals which have heretofore existed too deep for economic mining and opening new vistas of mining procedures by the controlled displacement of geothermal temperatures from one stratum or zone within the earth into other preselected strata or zones.
Whereas the invention has been described with reference to recovery of oil, gas, chemicals and minerals, it is within the scope of the invention to employ the system described hereinbefore to retort impure, salty or brackish waters within strata beneath the surface of the earth in order to recover pure water therefrom.
What is claimed is:
l. A system for producing a material selected from oil, gas, chemicals, minerals, metals and the like from a geological formation including a subsurface stratum containing at least one of said materials overlying a dry, subsurface geothermal zone having an abundant supply of naturally occurring heat and having a naturally occurring temperature substantially greater than said stratum, comprising in combination:
means for injecting heated fluid into said material containing stratum comprising a first well bore extending from said surface and through said stratum into said lower zone, a metal casing lining said bore containing a cap at a first end above said surface and a sealing plug received in the lower end of the casing within said zone and containing a first series of perforations above said plug and within said zone and a second series of perforations within the portion of the casing traversing the stratum; a fluid injection pipe disposed within said casing and having a first upper end extending through said cap and a second lower end extending sealingly through said plug and into said zone below said plug; a source of liquid; pump means for pumping said liquid from said source into the first end of said pipe and through said second end and into said zone to form a body of pressurized, heated fluid within said zone for entering said casing through said first series of perforations and for injecting said pressurized, heated fluid into said stratum through said second series of perforations to form a fluidized body of said liquid and material; and
a producing well spaced laterally from said first well bore having a lower, open end disposed within said stratum and an upper end communicating with the surface for transferring said fluidized body to the surface for recovery of said material.
2. A system according to claim 1 further including outlet means containing a valve connected to said casing above the surface for flowing said well at the surface of the earth.
3. A system according to claim 1 further comprising a cement layer surrounding and engaging said plug and the exterior of the casing below the surface of the earth and said layer containing said perforations and an aperture for receiving said pipe.
4. A method for recovering a material selected from oil, gas, minerals, chemicals, metals and the like from a geological formation including a subsurface stratum containing at least one of said materials and a lower, dry, geothermal zone having an abundant reservoir of heat and a natural temperature substantially above the temperature of the stratum comprising the steps of:
drilling a well bore through said formation having an upper end communicating with the surface of the earth and a lower end terminating within said zone;
lining said bore with a metal casing having a first series of perforations within said zone above the lower end of the casing and a second series of perforations within the portion of the casing traversing the stratum;
capping the upper end of the casing;
plugging the lower end of the casing within said zone and below said second perforations;
disposing a pipe within said casing having an upper end penetrating said cap and a lower end penetrating said plug and extending into said zone;
injecting liquid under pressure through said pipe into said zone to form a body of heated liquid;
transferring said heated liquid through said first perforations into said casing and from said casing through said second perforations into said stratum in sufficient volume to form a fluidized body of said heated liquid and said material within said stratum;
drilling at least one second well, laterally spaced from said first well and extending from the surface into said stratum and in communication with said fluidized body; and
recovering said fluidized body of material from said second well.
5. A method according to claim 4 in which said injected liquid is water.
* l i I I
Claims (5)
1. A system for producing a material selected from oil, gas, chemicals, minerals, metals and the like from a geological formation including a subsurface stratum containing at least one of said materials overlying a dry, subsurface geothermal zone having an abundant supply of naturally occurring heat and having a naturally occurring temperature substantially greater than said stratum, comprising in combination: means for injecting heated fluid into said material containing stratum comprising a first well bore extending from said surface and through said stratum into said lower zone, a metal casing lining said bore containing a cap at a first end above said surface and a sealing plug received in the lower end of the casing within said zone and containing a first series of perforations above said plug and within said zone and a second series of perforations within the portion of the casing traversing the stratum; a fluid injection pipe disposed within said casing and having a first upper end extending through said cap and a second lower end extending sealingly through said plug and into said zone below said plug; a source of liquid; pump means for pumping said liquid from said source into the first end of said pipe and through said second end and into said zone to form a body of pressurized, heated fluid within said zone for entering said casing through said first series of perforations and for injecting said pressurized, heated fluid into said stratum through said second series of perforations to form a fluidized body of said liquid and material; and a producing well spaced laterally from said first well bore having a lower, open end disposed within said stratum and an upper end communicating with the surface for transferring said fluidized body to the surface for recovery of said material.
2. A system according to claim 1 further including outlet means containing a valve connected to said casing above the surface for flowing said well at the surface of the earth.
3. A system according to claim 1 further comprising a cement layer surrounding and engaging said plug and the exterior of the casing below the surface of the earth and said layer containing said perforations and an aperture for receiving said pipe.
4. A method for recovering a material selected from oil, gas, minerals, chemicals, metals and the like from a geological formation including a subsurface stratum containing at least one of said materials and a lower, dry, geothermal zone having an abundant reservoir of heat and a natural temperature substantially above the temperature of the stratum comprising the steps of: drilling a well bore through said formation having an upper end communicating with the surface of the earth and a lower end terminating within said zone; lining said bore with a metal casing having a first series of perforations within said zone above the lower end of the casing and a second series of perforations within the portion of the casing traversing the stratum; capping the upper end of the casing; plugging the lower end of the casing within said zone and below said second perforations; disposing a pipe within said casing having an upper end penetrating said cap and a lower end penetrating said plug and extending into said zone; injecting liquid under pressure through said pipe into said zone to form a body of heated liquid; transferring said heated liquid through said first perforations into said casing and from said casing through said second perforations into said stratum in sufficient volume to form a fluidized body of said heated liquid and said material within said stratum; drilling at least one second well, laterally spaced from said first well and extending from the surface into said stratum and in communication with said fluidized body; and recovering said fluidized body of material from said second well.
5. A method according to claim 4 in which said injected liquid is water.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US86839569A | 1969-10-22 | 1969-10-22 |
Publications (1)
Publication Number | Publication Date |
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US3679264A true US3679264A (en) | 1972-07-25 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US868395A Expired - Lifetime US3679264A (en) | 1969-10-22 | 1969-10-22 | Geothermal in situ mining and retorting system |
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US (1) | US3679264A (en) |
Cited By (29)
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US3830317A (en) * | 1973-03-09 | 1974-08-20 | Atlantic Richfield Co | Well drilling in permafrost |
US3830305A (en) * | 1973-03-09 | 1974-08-20 | Atlantic Richfield Co | Method of well production in permafrost |
US3878884A (en) * | 1973-04-02 | 1975-04-22 | Cecil B Raleigh | Formation fracturing method |
US3889473A (en) * | 1972-01-26 | 1975-06-17 | Huisen Allen T Van | Geothermal channel and harbor ice control system |
US4074754A (en) * | 1976-09-27 | 1978-02-21 | Exxon Production Research Company | Method for producing geothermal energy and minerals |
US4078608A (en) * | 1975-11-26 | 1978-03-14 | Texaco Inc. | Thermal oil recovery method |
US4105252A (en) * | 1976-12-20 | 1978-08-08 | Atlantic Richfield Company | Solution mining of minerals from vertically spaced zones |
US4199028A (en) * | 1978-11-22 | 1980-04-22 | Conoco, Inc. | Enhanced recovery with geopressured water resource |
US4211613A (en) * | 1977-11-28 | 1980-07-08 | Milton Meckler | Geothermal mineral extraction system |
US4248306A (en) * | 1979-04-02 | 1981-02-03 | Huisen Allan T Van | Geothermal petroleum refining |
US4319635A (en) * | 1980-02-29 | 1982-03-16 | P. H. Jones Hydrogeology, Inc. | Method for enhanced oil recovery by geopressured waterflood |
US4387016A (en) * | 1980-11-10 | 1983-06-07 | Gagon Hugh W | Method for extraction of bituminous material |
US5322115A (en) * | 1988-07-08 | 1994-06-21 | Hans Hildebrand | Installation for energy exchange between the ground and an energy exchanger |
WO1994021889A2 (en) * | 1993-03-17 | 1994-09-29 | John North | Improvements in or relating to drilling and to the extraction of fluids |
US5622450A (en) * | 1995-03-24 | 1997-04-22 | Grant, Jr.; Richard P. | Pressure extraction process for removing soil and groundwater contaminants |
US20080073058A1 (en) * | 2006-09-22 | 2008-03-27 | Hiroaki Ueyama | Double-Pipe geothermal water circulating apparatus |
US20080142217A1 (en) * | 2006-10-20 | 2008-06-19 | Roelof Pieterson | Using geothermal energy to heat a portion of a formation for an in situ heat treatment process |
US20090056944A1 (en) * | 2007-08-30 | 2009-03-05 | George Nitschke | Enhanced oil recovery system for use with a geopressured-geothermal conversion system |
US20090080979A1 (en) * | 2007-09-21 | 2009-03-26 | Fruits & Associates, Inc. | System and method for decontaminating soil and groundwater |
US7798220B2 (en) | 2007-04-20 | 2010-09-21 | Shell Oil Company | In situ heat treatment of a tar sands formation after drive process treatment |
US7798221B2 (en) | 2000-04-24 | 2010-09-21 | Shell Oil Company | In situ recovery from a hydrocarbon containing formation |
US7866385B2 (en) | 2006-04-21 | 2011-01-11 | Shell Oil Company | Power systems utilizing the heat of produced formation fluid |
US7866386B2 (en) | 2007-10-19 | 2011-01-11 | Shell Oil Company | In situ oxidation of subsurface formations |
US8627887B2 (en) | 2001-10-24 | 2014-01-14 | Shell Oil Company | In situ recovery from a hydrocarbon containing formation |
US20150354903A1 (en) * | 2012-11-01 | 2015-12-10 | Skanska Sverige Ab | Thermal energy storage comprising an expansion space |
US9518787B2 (en) | 2012-11-01 | 2016-12-13 | Skanska Svergie Ab | Thermal energy storage system comprising a combined heating and cooling machine and a method for using the thermal energy storage system |
US9791217B2 (en) | 2012-11-01 | 2017-10-17 | Skanska Sverige Ab | Energy storage arrangement having tunnels configured as an inner helix and as an outer helix |
WO2019081892A1 (en) * | 2017-10-23 | 2019-05-02 | The University Of Bristol | Metal extraction method and system |
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US7798221B2 (en) | 2000-04-24 | 2010-09-21 | Shell Oil Company | In situ recovery from a hydrocarbon containing formation |
US8627887B2 (en) | 2001-10-24 | 2014-01-14 | Shell Oil Company | In situ recovery from a hydrocarbon containing formation |
US7866385B2 (en) | 2006-04-21 | 2011-01-11 | Shell Oil Company | Power systems utilizing the heat of produced formation fluid |
US20080073058A1 (en) * | 2006-09-22 | 2008-03-27 | Hiroaki Ueyama | Double-Pipe geothermal water circulating apparatus |
US7490657B2 (en) * | 2006-09-22 | 2009-02-17 | Hiroaki Ueyama | Double-pipe geothermal water circulating apparatus |
US7681647B2 (en) | 2006-10-20 | 2010-03-23 | Shell Oil Company | Method of producing drive fluid in situ in tar sands formations |
US8191630B2 (en) | 2006-10-20 | 2012-06-05 | Shell Oil Company | Creating fluid injectivity in tar sands formations |
US7677314B2 (en) | 2006-10-20 | 2010-03-16 | Shell Oil Company | Method of condensing vaporized water in situ to treat tar sands formations |
US7673681B2 (en) | 2006-10-20 | 2010-03-09 | Shell Oil Company | Treating tar sands formations with karsted zones |
US7717171B2 (en) | 2006-10-20 | 2010-05-18 | Shell Oil Company | Moving hydrocarbons through portions of tar sands formations with a fluid |
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US7730947B2 (en) | 2006-10-20 | 2010-06-08 | Shell Oil Company | Creating fluid injectivity in tar sands formations |
US7730946B2 (en) | 2006-10-20 | 2010-06-08 | Shell Oil Company | Treating tar sands formations with dolomite |
US7677310B2 (en) | 2006-10-20 | 2010-03-16 | Shell Oil Company | Creating and maintaining a gas cap in tar sands formations |
US20080142217A1 (en) * | 2006-10-20 | 2008-06-19 | Roelof Pieterson | Using geothermal energy to heat a portion of a formation for an in situ heat treatment process |
US7841401B2 (en) | 2006-10-20 | 2010-11-30 | Shell Oil Company | Gas injection to inhibit migration during an in situ heat treatment process |
US8555971B2 (en) | 2006-10-20 | 2013-10-15 | Shell Oil Company | Treating tar sands formations with dolomite |
US9181780B2 (en) | 2007-04-20 | 2015-11-10 | Shell Oil Company | Controlling and assessing pressure conditions during treatment of tar sands formations |
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US7798220B2 (en) | 2007-04-20 | 2010-09-21 | Shell Oil Company | In situ heat treatment of a tar sands formation after drive process treatment |
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US8381815B2 (en) | 2007-04-20 | 2013-02-26 | Shell Oil Company | Production from multiple zones of a tar sands formation |
US7841408B2 (en) | 2007-04-20 | 2010-11-30 | Shell Oil Company | In situ heat treatment from multiple layers of a tar sands formation |
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US7845406B2 (en) * | 2007-08-30 | 2010-12-07 | George Nitschke | Enhanced oil recovery system for use with a geopressured-geothermal conversion system |
US20090080979A1 (en) * | 2007-09-21 | 2009-03-26 | Fruits & Associates, Inc. | System and method for decontaminating soil and groundwater |
US8196658B2 (en) | 2007-10-19 | 2012-06-12 | Shell Oil Company | Irregular spacing of heat sources for treating hydrocarbon containing formations |
US7866386B2 (en) | 2007-10-19 | 2011-01-11 | Shell Oil Company | In situ oxidation of subsurface formations |
US20150354903A1 (en) * | 2012-11-01 | 2015-12-10 | Skanska Sverige Ab | Thermal energy storage comprising an expansion space |
US9518787B2 (en) | 2012-11-01 | 2016-12-13 | Skanska Svergie Ab | Thermal energy storage system comprising a combined heating and cooling machine and a method for using the thermal energy storage system |
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US9791217B2 (en) | 2012-11-01 | 2017-10-17 | Skanska Sverige Ab | Energy storage arrangement having tunnels configured as an inner helix and as an outer helix |
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