US3896879A - Stimulation of recovery from underground deposits - Google Patents
Stimulation of recovery from underground deposits Download PDFInfo
- Publication number
- US3896879A US3896879A US517677A US51767774A US3896879A US 3896879 A US3896879 A US 3896879A US 517677 A US517677 A US 517677A US 51767774 A US51767774 A US 51767774A US 3896879 A US3896879 A US 3896879A
- Authority
- US
- United States
- Prior art keywords
- formation
- solution
- hydrogen peroxide
- well
- copper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000011084 recovery Methods 0.000 title description 9
- 230000000638 stimulation Effects 0.000 title description 7
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000003381 stabilizer Substances 0.000 claims abstract description 21
- 230000035699 permeability Effects 0.000 claims abstract description 13
- 230000015572 biosynthetic process Effects 0.000 claims description 46
- 238000000034 method Methods 0.000 claims description 34
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 32
- 239000010949 copper Substances 0.000 claims description 32
- 229910052802 copper Inorganic materials 0.000 claims description 31
- DVRDHUBQLOKMHZ-UHFFFAOYSA-N chalcopyrite Chemical compound [S-2].[S-2].[Fe+2].[Cu+2] DVRDHUBQLOKMHZ-UHFFFAOYSA-N 0.000 claims description 12
- 229910052951 chalcopyrite Inorganic materials 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 claims description 5
- 229910052683 pyrite Inorganic materials 0.000 claims description 5
- 239000011028 pyrite Substances 0.000 claims description 5
- 150000002903 organophosphorus compounds Chemical group 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 claims description 2
- 230000009467 reduction Effects 0.000 claims description 2
- 230000004936 stimulating effect Effects 0.000 abstract description 3
- 238000005755 formation reaction Methods 0.000 description 37
- 239000000243 solution Substances 0.000 description 28
- 230000008569 process Effects 0.000 description 15
- 238000002347 injection Methods 0.000 description 10
- 239000007924 injection Substances 0.000 description 10
- 238000005065 mining Methods 0.000 description 10
- 239000002360 explosive Substances 0.000 description 9
- 229910052500 inorganic mineral Inorganic materials 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000011707 mineral Substances 0.000 description 8
- 238000011065 in-situ storage Methods 0.000 description 6
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 6
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 6
- 238000002386 leaching Methods 0.000 description 5
- 239000011435 rock Substances 0.000 description 5
- 229910001779 copper mineral Inorganic materials 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000011800 void material Substances 0.000 description 3
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 241000184339 Nemophila maculata Species 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- YDONNITUKPKTIG-UHFFFAOYSA-N [Nitrilotris(methylene)]trisphosphonic acid Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CP(O)(O)=O YDONNITUKPKTIG-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005474 detonation Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000009533 lab test Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical class [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 229940120146 EDTMP Drugs 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910052770 Uranium Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 229910000366 copper(II) sulfate Inorganic materials 0.000 description 1
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 description 1
- 229940090960 diethylenetriamine pentamethylene phosphonic acid Drugs 0.000 description 1
- DUYCTCQXNHFCSJ-UHFFFAOYSA-N dtpmp Chemical compound OP(=O)(O)CN(CP(O)(O)=O)CCN(CP(O)(=O)O)CCN(CP(O)(O)=O)CP(O)(O)=O DUYCTCQXNHFCSJ-UHFFFAOYSA-N 0.000 description 1
- NFDRPXJGHKJRLJ-UHFFFAOYSA-N edtmp Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CCN(CP(O)(O)=O)CP(O)(O)=O NFDRPXJGHKJRLJ-UHFFFAOYSA-N 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910001608 iron mineral Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- -1 temperature Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- DNYWZCXLKNTFFI-UHFFFAOYSA-N uranium Chemical compound [U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U] DNYWZCXLKNTFFI-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/2605—Methods for stimulating production by forming crevices or fractures using gas or liquefied gas
Definitions
- ABSTRACT Uniform stimulating of a low permeability deposit by the use of a hydrogen peroxide solution containing a stabilizer therefor.
- This invention relates to the treatment of underground deposit-bearing formations. More particularly, it relates to an improved method for fracturing such underground formations to enhance or stimulate the recovery of the desired deposits therefrom.
- explosives implanted in crevices, cracks, or fissures are common in mining and quarrying operations. Such explosives have included both solid and liquid-type explosives.
- the detonation of an explosive device or materials in a well-bore to achieve explosive fracturing of the surrounding formation suffers from the same disadvantage noted above with respect to hydrofracturing operations, namely the difficulty of propagating the fracture at increasing distances from the injection well-bore.
- Explosive fracturing by the detonation of an explosive device in a well-bore also requires a subsequent clean up operation before recovery of operations can be begun at that wellsite, increasing both the time and expense involved in such a treating action. Explosive fracturing also presents numerous safety problems; it has been experienced in the past that several people have been killed in conjunction with the utilization of explosives for carrying out the desired end result; i.e., fracturing underground formations.
- the objects of the present invention are accomplished by a process in which prior to any hydrometallurgical operation being conducted on the underground deposits, there is injected into the formation, via the well-bore, an aqueous hydrogen peroxide solution containing a stabilizing agent therefor. It has unexpectedly been found that the utilization of a stabilized aqueous hydrogen peroxide solution functions in such a manner, hereinafter described, to uniformly open up fractures and stimulate the underground formation.
- the stabilized aqueous hydrogen peroxide solution penetrates even the smallest fractures, for example, 1/32 of an inch or less, in all directions from the well-bore due to the solutions flow characteristics.
- the stabilized hydrogen peroxide solution comes into contact with metal values in the formation such as iron and copper values, the metal values react with the stabilizing agent in the hydrogen peroxide solution and there results a precipitation of the stabilizing agent from the solution.
- the stabilizing agent After the stabilizing agent has precipitated from the hydrogen peroxide solution, the hydrogen peroxide then undergoes rapid decomposition to forma gaseous medium which has a pressure greater than the formation breakdown pressure. Consequently, additional fractures are created in addition to the enlargement of the present fractures.
- the hydrogen peroxide solution which contains a stabilizing agent therefor is an aqueous solution containing from about 30 percent to about 98 percent by weight, based on the total weight of the solution, hydrogen peroxide. Lower concentrations of hydrogen peroxide can be utilized; however, it has been found that it is more desirable and effective to utilize a hydrogen peroxide solution containing at least 30 percent by weight hydrogen peroxide therein.
- the hydrogen peroxide solution also is desirably at a pH of less than 6.0 and preferably at a pH of about 4.0 or lower.
- the pH of the hydrogen peroxide solution When it is required to adjust the pH of the hydrogen peroxide solution, this may be accomplished by the addition thereto of an acid such as sulfuric acid, nitric acid, phosphoric acid, and acetic acid in any amount required to obtain the desired end pH value.
- an acid such as sulfuric acid, nitric acid, phosphoric acid, and acetic acid in any amount required to obtain the desired end pH value.
- the temperature of the overall hydrogen peroxide solution is initially at ambient temperature; however, temperatures of about 20 C to about C can be used where one so desires.
- the critical feature in the present invention relates to the utilization of a stabilizing agent with the hydrogen peroxide solution.
- a stabilizing agent is the safety feature in conjunction with the use of the hydrogen peroxide solution per se.
- the stabilizing agent thus provides a safe period of time during which hydrogen peroxide is pumped through the well-bore into the fractures surrounding the well-bore. Thus the possibility of a blow-back through the well-bore is substantially reduced.
- the stabilizing agent is any material which is slowly precipitated out of solution by metal values in the formation.
- the material is an organophosphorus compound such as amino trimethylene phosphonic acid, ethylene diamine tetramethylene phosphonic acid, diethylene triamine pentamethylene phosphonic acid and the like and water soluble salts thereof. It is to be understood that other organophosphorus compounds can be used as long as they function in the required manner.
- the processes of the present invention are particularly effective in conjunction with the in-situ mining of underground formations which contain copper metal values in the form of chalcopyrite and pyrite ores. It has been found that the uniform stimulation of a low permeability deposit is an important factor for an economically viable in-situ mining operation. In the particular case relating to the underground (or solution) mining of chalcopyrite and pyrite ores, this uniform stimulation permits the leaching solvent to contact more of the copper minerals, thus increasing both the leach efficiency and copper loadings. Both of these parameters are critical for economically mining deep-lying low grade copper ores by in-situ mining techniques.
- the process comprises the steps wherein the aqueous hydrogen peroxide solution, containing the stabilizing agent therein, is pumped down a well and allowed to flow into the deposit.
- the hydrogen peroxide flows or diffuses into small fractures (or pores) where it comes into contact with copper and iron minerals, together with other minerals present in the formation.
- the stabilizing agent contained in said solution is precipitated out leaving the hydrogen peroxide in an unstabilized condition.
- the hydrogen peroxide then decomposes because of the catalytic action of the chalcopyrite and pyrite thereon, the rate of decomposition being a function of the minerals contacted, the solid exposed surface area in contact with the hydrogen peroxide, temperature, additives present in the hydrogen peroxide, strength of hydrogen peroxide solution and the like.
- a large gas pressure is built up and when this pressure exceeds the parting pressure of the formation, fracturing or stimulation occurs. It has been found that because of the rapid decomposition of the hydrogen peroxide, the fracturing or stimulation is conducted in a uniform, radial manner and at substantial distances from the well-bore due to the good penetration of the hydrogen peroxide into the smallest of fractures.
- the copper leaching solution is injected in order to subsequently recover the copper values.
- the copper leaching procedures can be carried out in any manner known to those skilled in the art of in-situ mining such as those procedures described in U.S. Pat. No. 3,574,599, U.S. Pat. No. 3,640,579, and U.S. Pat. No. 3,708,206, all of which publications are incorporated herein by reference.
- the hydrogen peroxide solution can be used at any time where one so desires.
- the solution is used as a pretreatment of the formation or deposit.
- said solution can be employed where deposits have already been subjected to hydrometallurgical operations.
- EXAMPLE I An ore body acres in area and averaging 1000 feet in thickness lies at an average depth of 4,000 feet below the surface of the earth in Arizona. Samples of the ore show that it is composed primarily of granitic igneous rock and that it contains chalcopyrite as the principal copper mineral. The ore samples also show that it contains approximately 1.4 weight percent chalcopyrite and that the total copper content of the ore averages 0.5 percent. The volume of ore in the deposit is, therefore 10 acre-feet or 4.356 X 10 cubic feet. The
- total weight of the ore in the deposit is 3.54 X 10 tons, and the copper content of the ore body is 3.54 X 10 pounds.
- Approximately 50 wells are drilled into the ore body in an array such as to provide a five-spot pattern, and the wells are completed such that fluids may be either injected or produced from individual wells.
- the void volume within the randomly oriented fracture system is equivalent to 2 percent of the bulk ore volume, that the fracture spacing averages 6 inches, and that the permeability of the ore body to liquid averages less than about 2 millidarcys. This permeability is less than desired for economic recovery of copper.
- Petrographic examination of core samples taken from the ore body shows that about 2 percent of the rock surface area exposed by the fractures is covered by the chalcopyrite mineral and that the rock matrix bounded by the fracture system is substantially cubical in configuration.
- the surface-to-volume ratio of the ore blocks bounded by the fractures is approximately equal to that for cubically shaped blocks and the surface area to volume ratio for the ore blocks is equal to 6/L, where L is the length of the side of a cube. In this case L 0.5 feet, and the surface area to volume ratio is equal to 12 square feet/cubic foot.
- the total surface area of ore exposed by the fracture network is equal to 12 X 4.36 X or 5.227 X 10 square feet.
- the surface area of the chalcopyrite mineral exposed by the fracture system is equal to 2 percent of the total surface area, or 1.045 X 10 square feet.
- the 0.4 molar ferric sulfate solution in order to supply 0.4 molar ferric sulfate solution to the ore body at the optimum rate; iie., at the rate sufficient to produce the maximum amount of copper and at the same time allow total reaction of the ferric iron, the 0.4 molar ferric sulfate solution must be injected initially at a rate equal to 69,700 barrels/day.
- the required average residence time for the solution within the ore body is fixed by the injection rate and the void volume of the ore body:
- the injection and withdrawal rates of the wells are thus regulated to permit the ferric sulfate solution to remain in the ore body for approximately 22 days.
- the hydrogen peroxide solution containing the stabilizer is used to increase the permeability to the economical range.
- the wells are operated for a sufficient period of time to r ach equilibrium and the copper produced averages about 187,000 pounds per day.
- Example I has been described as applicable to the copper sulfide ores, it should be understood that the process is also applicable to ores bearing native copper and also to ores of copper oxides and silicates where the copper is present in the cuprous valence state.
- the copper is present in its elemental or lower valence state, it is susceptible to oxidation by ferric iron to form solutions of cupric sulfate.
- the leach solution will be injected through a well, permitted to remain in contact with the ore body for a period of time, and then withdrawn through the same well.
- the pregnant leach solution is then passed to a copper recovery stage, a regeneration stage and ultimately reinjected.
- a method for increasing the permeability of a subterranean formation penetrated by at least one well which extends from the surface of the earth to the formation comprising the steps of injecting an aqueous hydrogen peroxide solution containing a stabilizing agent therefor through said well into the subterranean formation whereby said solution diffuses into the fractures of the formation surrounding said well, the stabilizing agent reacts with metal values in said formation resulting in a substantial reduction of said agent in said solution, and the resultant substantially unstabilized hydrogen peroxide decomposes to form a gaseous medium which causes additional fracturing of the formation.
- concentration of the hydrogen peroxide in solution is from about 30 percent to about 98 percent, by weight, based on the total weight of said solution and the pH of said solution is less than about 6.0.
- the stabilizing agent is an organophosphorus compound which precipitates out of said solution when said compound comes into contact with the metal values in the formation.
Abstract
Description
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US517677A US3896879A (en) | 1973-12-06 | 1974-10-24 | Stimulation of recovery from underground deposits |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US422233A US3865435A (en) | 1973-12-06 | 1973-12-06 | Stimulation of recovery from underground deposits |
US517677A US3896879A (en) | 1973-12-06 | 1974-10-24 | Stimulation of recovery from underground deposits |
Publications (1)
Publication Number | Publication Date |
---|---|
US3896879A true US3896879A (en) | 1975-07-29 |
Family
ID=27025527
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US517677A Expired - Lifetime US3896879A (en) | 1973-12-06 | 1974-10-24 | Stimulation of recovery from underground deposits |
Country Status (1)
Country | Link |
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US (1) | US3896879A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4548252A (en) * | 1984-04-04 | 1985-10-22 | Mobil Oil Corporation | Controlled pulse fracturing |
US4588506A (en) * | 1984-11-08 | 1986-05-13 | Fmc Corporation | Stimulation of biooxidation processes in subterranean formations |
US4590997A (en) * | 1985-01-28 | 1986-05-27 | Mobil Oil Corporation | Controlled pulse and peroxide fracturing combined with a metal containing proppant |
US4591443A (en) * | 1984-11-08 | 1986-05-27 | Fmc Corporation | Method for decontaminating a permeable subterranean formation |
US4630868A (en) * | 1979-05-11 | 1986-12-23 | Terra Tek, Inc. | Process for solution mining |
US4714114A (en) * | 1986-12-22 | 1987-12-22 | Mobil Oil Corporation | Use of a proppant with controlled pulse fracturing |
US4718490A (en) * | 1986-12-24 | 1988-01-12 | Mobil Oil Corporation | Creation of multiple sequential hydraulic fractures via hydraulic fracturing combined with controlled pulse fracturing |
US4747728A (en) * | 1986-08-25 | 1988-05-31 | International Technology Corporation | Method for distributing an aqueous solution containing a peroxygen in clay |
US4848468A (en) * | 1986-12-08 | 1989-07-18 | Mobil Oil Corp. | Enhanced hydraulic fracturing of a shallow subsurface formation |
US4867241A (en) * | 1986-11-12 | 1989-09-19 | Mobil Oil Corporation | Limited entry, multiple fracturing from deviated wellbores |
GB2457052A (en) * | 2008-01-31 | 2009-08-05 | John Philip Whitter | Cleaning a borehole with hydrogen peroxide |
US9376901B2 (en) | 2011-09-20 | 2016-06-28 | John Pantano | Increased resource recovery by inorganic and organic reactions and subsequent physical actions that modify properties of the subterranean formation which reduces produced water waste and increases resource utilization via stimulation of biogenic methane generation |
WO2023035416A1 (en) * | 2021-09-08 | 2023-03-16 | 西南石油大学 | Shale gas layer oxidative burst transformation method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2900026A (en) * | 1955-07-21 | 1959-08-18 | Shell Dev | Process for freeing stuck drilling tools |
US3383174A (en) * | 1965-04-07 | 1968-05-14 | Fmc Corp | Stabilization of hydrogen peroxide |
US3815957A (en) * | 1972-09-11 | 1974-06-11 | Kennecott Copper Corp | Controlled in-situ leaching of mineral values |
US3822916A (en) * | 1972-11-16 | 1974-07-09 | Akzona Inc | In-situ extraction of mineral values from ore deposits |
-
1974
- 1974-10-24 US US517677A patent/US3896879A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2900026A (en) * | 1955-07-21 | 1959-08-18 | Shell Dev | Process for freeing stuck drilling tools |
US3383174A (en) * | 1965-04-07 | 1968-05-14 | Fmc Corp | Stabilization of hydrogen peroxide |
US3815957A (en) * | 1972-09-11 | 1974-06-11 | Kennecott Copper Corp | Controlled in-situ leaching of mineral values |
US3822916A (en) * | 1972-11-16 | 1974-07-09 | Akzona Inc | In-situ extraction of mineral values from ore deposits |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4630868A (en) * | 1979-05-11 | 1986-12-23 | Terra Tek, Inc. | Process for solution mining |
US4548252A (en) * | 1984-04-04 | 1985-10-22 | Mobil Oil Corporation | Controlled pulse fracturing |
US4588506A (en) * | 1984-11-08 | 1986-05-13 | Fmc Corporation | Stimulation of biooxidation processes in subterranean formations |
US4591443A (en) * | 1984-11-08 | 1986-05-27 | Fmc Corporation | Method for decontaminating a permeable subterranean formation |
US4590997A (en) * | 1985-01-28 | 1986-05-27 | Mobil Oil Corporation | Controlled pulse and peroxide fracturing combined with a metal containing proppant |
US4747728A (en) * | 1986-08-25 | 1988-05-31 | International Technology Corporation | Method for distributing an aqueous solution containing a peroxygen in clay |
US4867241A (en) * | 1986-11-12 | 1989-09-19 | Mobil Oil Corporation | Limited entry, multiple fracturing from deviated wellbores |
US4848468A (en) * | 1986-12-08 | 1989-07-18 | Mobil Oil Corp. | Enhanced hydraulic fracturing of a shallow subsurface formation |
US4714114A (en) * | 1986-12-22 | 1987-12-22 | Mobil Oil Corporation | Use of a proppant with controlled pulse fracturing |
US4718490A (en) * | 1986-12-24 | 1988-01-12 | Mobil Oil Corporation | Creation of multiple sequential hydraulic fractures via hydraulic fracturing combined with controlled pulse fracturing |
GB2457052A (en) * | 2008-01-31 | 2009-08-05 | John Philip Whitter | Cleaning a borehole with hydrogen peroxide |
US9376901B2 (en) | 2011-09-20 | 2016-06-28 | John Pantano | Increased resource recovery by inorganic and organic reactions and subsequent physical actions that modify properties of the subterranean formation which reduces produced water waste and increases resource utilization via stimulation of biogenic methane generation |
WO2023035416A1 (en) * | 2021-09-08 | 2023-03-16 | 西南石油大学 | Shale gas layer oxidative burst transformation method |
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