US3608638A - Heavy oil recovery method - Google Patents

Heavy oil recovery method Download PDF

Info

Publication number
US3608638A
US3608638A US3608638DA US3608638A US 3608638 A US3608638 A US 3608638A US 3608638D A US3608638D A US 3608638DA US 3608638 A US3608638 A US 3608638A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
oil
tar sand
solvent
well
production well
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
Application number
Inventor
Paul L Terwilliger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chevron Research and Technology Co
Gulf Research and Development Co
Original Assignee
Gulf Research and Development Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Grant date

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/16Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/24Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection

Abstract

A hydrocarbon solvent such as benzene, platformate, or kerosene at a temperature in the range of 300* to 700* F. is injected into the top of tar sands at an injection well and forced through the formation to an adjacent production well. Injection of the solvent and production of oil are continued to maintain a gaseous phase across the top of the formation. The tar sand oil is made more mobile as a result of heating and dissolution of the solvent into the oil whereby the oil drains into the production well and is lifted to the surface.

Description

United States Patent HEAVY OlL RECOVERY METHOD This invention relates to the production of oil and more particularly relates to the production of heavy, highly viscous oils from tar sands. l

Enormous quantities of hydrocarbons exist in known deposits of high-density, high-viscosity oil in essentially unconsolidated formations referred to as tar sands. Examples of such formations are the Athabasca and Peace River tar sands in Canada Oil in such formations frequently includes substantial amounts of asphaltic materials that are insoluble in petroleum-naphthas. The oil may be highly viscous or even of a semisolid bituminous nature, or may have a high pour point. Any one of the properties alone may preclude recovery of oil from the tar sands by primary production methods.

Although the permeability of some of the tar sands is sometimes relatively high, because of the low mobility of the oil and the shallow depth of many tar sands which preclude applying high pressures to the tar sands without breaking through the overburden, effective production procedures have not been developed. The unconsolidated nature of the deposits prevents effective fracturing and propping of a fracture to form flow channels of high flow capacity and controlled location through the tar sand to production wells.

ln-situ combustion has been attempted as a method of producing the tar sands, but has not been successful because the permeability of the tar sands to flow is sharply reduced by the three phases of gas, water, and oil ahead of the combustion front. Furthermore, the oil ahead of the combustion front remains cold and immobile. Attempts have been made to produce heavy oils from tar sand by by creating a permeable channel through tar sands from an injection well to a production well, and thereafter injecting air into the channel. It was believed that oil from the formation would diffuse into the channel burn and thereby heat the oil in the tar sands the increase its mobility. Such procedures have not been successful because the air injected largely bypasses the oil in the formation, flows into the production well, and ignites oil in the production well. As a result of all of these difficulties, some have gone to an expensive mining and surface treating of the tar sands to recover the hydrocarbons.

This invention resides in a process for producing low gravity, highly viseous oils from tar sands in which a hot hydrocarbon solvent such as benzene, platformate, and kerosene is injected into the top of the tar sands at an injection well and forced through the formation to an adjacent production well. The temperature of the injected hydrocarbons is high enough to maintain a gaseous phase to establish a permeable vaporfilled channel across the top ofthe formation. Oil flowing into the production well is lifted through the production at a rate maintaining a pressure not substantially greater than atmospheric pressure in thc production well. As production continues, the upper portion of the tar sands is left filled with hydrocarbon vapors, or liquid of low viscosity formed by the condensation of hydrocarbon vapors, that can readily be recovered by a subsequent production step.

The single FIGURE of the drawings is a diagrammatic vertical sectional view through injection and production wells extending downwardly through a tar sand.

Referring to the drawing, a tar sand l is shown penetrated by an injection well indicated generally by reference numeral 12 and a production well spaced from the injection well and indicated generally by reference numeral 14. Both wells l2 and 14 are shown extending through an overburden 16 across the top of the tar sand 10, through the tar sand, and into an underlying formation 18.

The tar sand l0 is an incompetent or partially consolidated formation which can be parted bythe injection of fluid at a high rate but cannot be fractured in the sense of creating a well-defined channel which can be propped open. This invention can be used when the permeability of the tar sand is relatively high, preferably exceeding 100 millidarcies, to permit flow at significant rates through the formation at low pressure differentialsfrom the injection well to the production well.

The mobility of the oil in tar sand l0 is low enough to prevent economically feasible production by primary production methods or by simple fluid drive processes. This invention is particularly advantageous in the recovery from tar sands of oil that includes substantial quantities of asphaltic materials that are insoluble in highly paraffinie hydrocarbons such as propane, butane or even light naphthas or condensate. This invention is particularly valuable when tar sand l0 is relatively shallow and cannot be subjected to high pressures, and, therefore, the pressure available for driving oil through the formation is limited.

Injection well 12 has casing 20 extending downwardly into the underlying formation 18. Casing 20 is cemented in place by conventional cementing procedures, after which perforations 22 through the casing and surrounding cement sheath are formed by any suitable method such as by use of shaped charges in the interval of the tar sand near its upper boundary. lt is preferred that the perforations 22 be in the upper eighth of the tar sand 10. Casing 20 is capped at 24 and a tubing 26 run into the casing through a packer 28.

Production well 14 is spaced from the injection well l2 at a desirable distance, depending on the characteristics of the tar sand and the well pattern, to give suitable production rates. lt is preferred that well 14 be at a distance less than about 600 feet from well l2 to give 5 to l0 acre spacing. Production well 14 has easing 30 extending downwardly through tar sand y10 into the underlying formation 18. Casing 30 is cemented in accordance with the conventional cementing procedures. After perforations 32 are formed in casing 30 and the surrounding cement sheath in the interval of tar sand 10 near its lower boundary, tubing 34 is run into well 14 and held in plaec at its lower end by a packer 36 set in casing 30 above the perforations. Tubing 34 extends through a cap 38 closing the upper end of the well 14. A pump 40 is anchored in the lower end of the tubing 34 for lifting oil through the production well.

ln the method of this invention, a hot solvent is pumped down through tubing 26 and injected through the perforations 22 into the upper part of tar sand l0.v The solvents should include hydrocarbons of low enough boiling point to result in a vapor-filled zone extending across the tar sands in the area that has been swept free of reservoir oil. The gaseous solvent will condense and dissolve in oil remaining in the vapor-filled zone and reduce its viscosity beyond the reduction resulting from heating alone. Any liquid of low viscosity that is capable of being vaporized at temperatures that will not cause cracking of the solvent or the tar sand oil and is miscible in the tar sand oil without precipitating constitutes in the oil can be used as the solvent. Preferred solvents because of their rela tively low cost and good solvent properties are aromatic hydrocarbons or mixtures of hydrocarbons containing substantial amounts of aromatic hydrocarbons. Examples of such hydrocarbons are benzene, toluene, xylene, and highly aromatic mixtures of hydrocarbons having a boiling point range substantially the same as gasoline. Kerosene can also be used. Highly paraffinic hydrocarbons such as LPG, light naphthas or condensate are not suitable because of their inability to dissolve asphaltic constituents of the tar sand oil. Condensate composed principally of paraffinic hydrocarbons has been found to cause precipitation of asphalt from Athabasca or Peace River tar sands even though the condensate was approximately 70 percent Cland contained only about 7 percent C3 and C4.

The solvent is injected preferably in the vapor phase at a temperature in the range of 300 to 700 F. lt is preferred that the temperature of the injected solvent be as high as possible without causing substantial cracking of the solvent as it passes down tubing 26 and into the tar sand l0. ln any event, the temperature of the solvent should exceed its initial boiling point at the formation pressure in the tar sand. On entering the tar sand l0, solvent will remain in the vapor phase in the upper part of the tar sands where the reservoir has been flushed out. Where the solvent vapor contacts reservoir oil, the solvent will condense and dissolve in the oil in the tar sands. The raising of the temperature of the oil in the tar sands and the dilution of the oil by the hot solvent greatly increase the mobility of the oil in the tar sand l0. Continued injection of the hot solvent results in extension of a vapor-filled zone 42 across the top of the tar sand from well l2 to well 14. The single phase in the zone greatly increases the permeability of the formation to the injected solvent and allows circulation from the injection well to the production well at a low pressure differential.

During the injection of hot solvent at the injection well, oil is pumped from the production well by pump 40. lnjection and production are continued after the solvent breaks through at the production well to heat the tar sands adjacent the production well and reduce the production well and reduce the pressure in the tar sands adjacent the production well to less than the vapor pressure of the solvent at the prevailing temperature. The maximum pressure which can be maintained in the reservoir adjacent the production well will, therefore, depend on the particular solvent used and the temperature of the solvent. lf benzene is the solvent used and the temperature adjacent the production well is 400 F., for example the pressure at the production well may be as high as 200 p.s.i. Higher pressures can be maintained if the temperature is increased. A low pressure, for example less than l p,s.i. and even as low as atmospheric pressure can be attained, adjacent the production well and is advantageous in increasing the volumes of the hot vapors and thereby increasing their effectiveness in driving oil from the formation.

Injection of hot solvent at well l2 and production of oil at well 14 is continued at a rate to extend a vapor phase zone 42 all of the way across thc tar sand from the injection well to the production well. The vapors cone downwardly at the production well toward the perforations 32 and thereby cause the lower boundary of the vapor zone to slope downwardly. Oil adjacent well 14 drains by gravity drainage into the well through perforations 32. Oil in the tar sand directly below zone 42 is heated and diluted by the hot solvent. The resultant mixture has a high mobility and flows along the lower boundary of zone 42, particularly along the downwardly sloping boundary of the production well 14, and drains into production well 14 through perforations 32. lf part of the oil in the tar sand is vaporized it flows into zone 42 and is swept by the hot vaporized solvents to well 14. The downwardly flowing vapors mix with the heated oil near the production well and further reduce the viscosity of the oil flowing into the well.

The oil entering well 14 is lifted by pump 40 to the surface. Continued injection of hot solvent through well l2 and production of oil through well 14 cause zone 42 to bc gradually enlarged downwardly. When the lower boundary of zone 42 approaches the lower boundary of the tar sand l0, or the viscosity of the remaining tar sand oil has been reduce by heating or dilution with solvent, the hot solvent injection is stopped. The solvent and low viscosity oil remaining in the tar sand can be readily displaced through the tar sand to the production well by a tertiary recovery process such as water or insert gas flooding. Forward combustion can also bc used to displace the remaining oil.

lt is essential to this invention that the hot solvent be injected into the formation near its upper boundary. lf hot solvent is injected into a lower part of the tar sand, oil above the level of injection made fluid by the hot solvent drains downwardly into the vapor zone, condenses the hot solvent, and prevents the rapid establishment of a well-to-well vapor zone.

This invention has been described for a production well having perforations 32 near the lower boundary of the tars and l0 from the beginning of the operation. Perforations could initially be made near the upper boundary of the tar zone and then, as the zone 42 is enlarged, new perforations made at successively lower positions, in each instance below the lower boundary of the zone 42, and the packer 36 successively resets just above the lowest perforations. Oil made mobile or fluid by heat and dilution will still flow into the production well by gravity drainage, but will not have as far to drain.

lclaim: l. A method of producing heavy asphaltic oil from a tar sand comprising injecting into the upper portion of the tar sand at an injection well penetrating the tars and a hot fluid consisting essentially of a hydrocarbon solvent selected from the group consisting of at least one aromatic hydrocarbon selected from the group consisting of benzene, toluene and xylene, mixtures containing a high concentration of such aromatic hydrocarbons with nonaromatic hydrocarbons of of substantially the same boiling point, and kerosene; the temperature of the hot solvent injected into the formation being in the range of 300 to 700 F. such that the temperature exceeds the initial boiling point of the solvent at the tar sand formation pressure to form a vapor zone extending substantially horizontally across the tar sad near the lower boundary thereof at a production well production well spaced from the injection well; and continuing the injection of the hot solvent to extend the vapor zone in the tar sand to the vicinity of the production well and heat oil in the tar sand below the vapor zone whereby said heated oil whereby said heated oil drains to the production well.

LColumn Eggg UNITED STATES PATENT QFFICE CERTIFICATE OF CORRECTION Patent No. 3, 608, 638 Dated September 28, 1971 Inventor(s) Paul L. 'lerwilliger It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column l, line 9, insert after "Canada" Column l, line l3, "the" should read "those" Column l, line 23, "sand" should read "sands" Column l, line 30, "sand" should read "sands" Column l, line 30, delete "by" second occurrence Column l, line 34, insert after "channel" Column l, line 34, cancel "the", third occurrence Column 2, line 49, "constitutes" should read "constituents" Column 3, line 13 delete "and reduce the production well" Column 3, line 25, "volumes" should read "volume" Column 3, line 39, "of" should read "near" Column line 3 "reduce" should read "reduced" Column line 8, "insert" should read "inert" Column line 18, "tars and" should read "tar sand" line 23, "resets" should read "reset" Column line 30, "tars and" should read "tar sand" Column 4,

Column 4, line 35, delete "of" second occurrence line 4l, "tar sad" should read "top of the tar sand J formation, withdrawing oil from the tar sandI lines 45 and 46, delete "whereby said heated oil" second occurrence Column 4,

Signed and sealed this Zth day of June 'I 972.

(SEAL) Attest:

ROBERT GOT'I'SCHALK EDWARD MTLETGHERJR.

Commissioner of Patents .Attesting Officer

Claims (1)

1. A method of producing heavy asphaltic oil from a tar sand comprising injecting into the upper portion of the tar sand at an injection well penetrating the tars and a hot fluid consisting essentially of a hydrocarbon solvent selected from the group consisting of at least one aromatic hydrocarbon selected from the group consisting of benzene, toluene and xylene, mixtures containing a high concentration of such aromatic hydrocarbons with nonaromatic hydrocarbons of of substantially the same boiling point, and kerosene; the temperature of the hot solvent injected into the formation being in the range of 300* to 700* F. such that the temperature exceeds the initial boiling point of the solvent at the tar sand formation pressure to form a vapor zone extending substantially horizontally across the tar sad near the lower boundary thereof at a production well production well spaced from the injection well; and continuing the injection of the hot solvent to extend the vapor zone in the tar sand to the vicinity of the production well and heat oil in the tar sand below the vapor zone whereby said heated oil whereby said heated oil drains to the production well.
US3608638A 1969-12-23 1969-12-23 Heavy oil recovery method Expired - Lifetime US3608638A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US88761369 true 1969-12-23 1969-12-23

Publications (1)

Publication Number Publication Date
US3608638A true US3608638A (en) 1971-09-28

Family

ID=25391509

Family Applications (1)

Application Number Title Priority Date Filing Date
US3608638A Expired - Lifetime US3608638A (en) 1969-12-23 1969-12-23 Heavy oil recovery method

Country Status (1)

Country Link
US (1) US3608638A (en)

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3881550A (en) * 1973-05-24 1975-05-06 Parsons Co Ralph M In situ recovery of hydrocarbons from tar sands
US3881551A (en) * 1973-10-12 1975-05-06 Ruel C Terry Method of extracting immobile hydrocarbons
US3954139A (en) * 1971-09-30 1976-05-04 Texaco Inc. Secondary recovery by miscible vertical drive
US3954141A (en) * 1973-10-15 1976-05-04 Texaco Inc. Multiple solvent heavy oil recovery method
US3983939A (en) * 1975-10-31 1976-10-05 Texaco Inc. Method for recovering viscous petroleum
US4004636A (en) * 1975-05-27 1977-01-25 Texaco Inc. Combined multiple solvent and thermal heavy oil recovery
US4007791A (en) * 1975-08-07 1977-02-15 J. Carroll Baisch Method for recovery of crude oil from oil wells
US4008765A (en) * 1975-12-22 1977-02-22 Chevron Research Company Method of recovering viscous petroleum from thick tar sand
US4019575A (en) * 1975-12-22 1977-04-26 Chevron Research Company System for recovering viscous petroleum from thick tar sand
US4067391A (en) * 1976-06-18 1978-01-10 Dewell Robert R In-situ extraction of asphaltic sands by counter-current hydrocarbon vapors
US4120357A (en) * 1977-10-11 1978-10-17 Chevron Research Company Method and apparatus for recovering viscous petroleum from thick tar sand
US4697642A (en) * 1986-06-27 1987-10-06 Tenneco Oil Company Gravity stabilized thermal miscible displacement process
US5022466A (en) * 1989-01-03 1991-06-11 Mobil Oil Corporation Method for steam flooding profile control
US5052487A (en) * 1989-12-29 1991-10-01 Chevron Research & Technology Company Sequential injection foam process for enhanced oil recovery
US5390740A (en) * 1993-12-17 1995-02-21 Texaco Inc. Method and apparatus to recycle production well casing vapor
US6305472B2 (en) 1998-11-20 2001-10-23 Texaco Inc. Chemically assisted thermal flood process
US6372123B1 (en) 2000-06-26 2002-04-16 Colt Engineering Corporation Method of removing water and contaminants from crude oil containing same
US6536523B1 (en) 1997-01-14 2003-03-25 Aqua Pure Ventures Inc. Water treatment process for thermal heavy oil recovery
US6662872B2 (en) 2000-11-10 2003-12-16 Exxonmobil Upstream Research Company Combined steam and vapor extraction process (SAVEX) for in situ bitumen and heavy oil production
US6708759B2 (en) 2001-04-04 2004-03-23 Exxonmobil Upstream Research Company Liquid addition to steam for enhancing recovery of cyclic steam stimulation or LASER-CSS
US6769486B2 (en) 2001-05-31 2004-08-03 Exxonmobil Upstream Research Company Cyclic solvent process for in-situ bitumen and heavy oil production
US20050145383A1 (en) * 2001-06-21 2005-07-07 John Nenniger Method and apparatus for stimulating heavy oil production
US20050211434A1 (en) * 2004-03-24 2005-09-29 Gates Ian D Process for in situ recovery of bitumen and heavy oil
US20080261835A1 (en) * 2007-04-23 2008-10-23 Paul Daniel Berger Surfactant based compositions and process for heavy oil recovery
US7640987B2 (en) 2005-08-17 2010-01-05 Halliburton Energy Services, Inc. Communicating fluids with a heated-fluid generation system
US20100096147A1 (en) * 2006-07-19 2010-04-22 John Nenniger Methods and Apparatuses For Enhanced In Situ Hydrocarbon Production
US20100163229A1 (en) * 2006-06-07 2010-07-01 John Nenniger Methods and apparatuses for sagd hydrocarbon production
US7770643B2 (en) 2006-10-10 2010-08-10 Halliburton Energy Services, Inc. Hydrocarbon recovery using fluids
US7809538B2 (en) 2006-01-13 2010-10-05 Halliburton Energy Services, Inc. Real time monitoring and control of thermal recovery operations for heavy oil reservoirs
US7832482B2 (en) 2006-10-10 2010-11-16 Halliburton Energy Services, Inc. Producing resources using steam injection
US8684079B2 (en) 2010-03-16 2014-04-01 Exxonmobile Upstream Research Company Use of a solvent and emulsion for in situ oil recovery
US8752623B2 (en) 2010-02-17 2014-06-17 Exxonmobil Upstream Research Company Solvent separation in a solvent-dominated recovery process
US8899321B2 (en) 2010-05-26 2014-12-02 Exxonmobil Upstream Research Company Method of distributing a viscosity reducing solvent to a set of wells
US9085972B1 (en) * 2005-06-20 2015-07-21 Gilman A. Hill Integrated in situ retorting and refining of heavy-oil and tar sand deposits

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2365591A (en) * 1942-08-15 1944-12-19 Ranney Leo Method for producing oil from viscous deposits
US2862558A (en) * 1955-12-28 1958-12-02 Phillips Petroleum Co Recovering oils from formations
US3351132A (en) * 1965-07-16 1967-11-07 Equity Oil Company Post-primary thermal method of recovering oil from oil wells and the like
US3358756A (en) * 1965-03-12 1967-12-19 Shell Oil Co Method for in situ recovery of solid or semi-solid petroleum deposits
US3439743A (en) * 1967-07-13 1969-04-22 Gulf Research Development Co Miscible flooding process

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2365591A (en) * 1942-08-15 1944-12-19 Ranney Leo Method for producing oil from viscous deposits
US2862558A (en) * 1955-12-28 1958-12-02 Phillips Petroleum Co Recovering oils from formations
US3358756A (en) * 1965-03-12 1967-12-19 Shell Oil Co Method for in situ recovery of solid or semi-solid petroleum deposits
US3351132A (en) * 1965-07-16 1967-11-07 Equity Oil Company Post-primary thermal method of recovering oil from oil wells and the like
US3439743A (en) * 1967-07-13 1969-04-22 Gulf Research Development Co Miscible flooding process

Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3954139A (en) * 1971-09-30 1976-05-04 Texaco Inc. Secondary recovery by miscible vertical drive
US3881550A (en) * 1973-05-24 1975-05-06 Parsons Co Ralph M In situ recovery of hydrocarbons from tar sands
US3881551A (en) * 1973-10-12 1975-05-06 Ruel C Terry Method of extracting immobile hydrocarbons
US3954141A (en) * 1973-10-15 1976-05-04 Texaco Inc. Multiple solvent heavy oil recovery method
US4004636A (en) * 1975-05-27 1977-01-25 Texaco Inc. Combined multiple solvent and thermal heavy oil recovery
US4007791A (en) * 1975-08-07 1977-02-15 J. Carroll Baisch Method for recovery of crude oil from oil wells
US3983939A (en) * 1975-10-31 1976-10-05 Texaco Inc. Method for recovering viscous petroleum
US4008765A (en) * 1975-12-22 1977-02-22 Chevron Research Company Method of recovering viscous petroleum from thick tar sand
US4019575A (en) * 1975-12-22 1977-04-26 Chevron Research Company System for recovering viscous petroleum from thick tar sand
US4067391A (en) * 1976-06-18 1978-01-10 Dewell Robert R In-situ extraction of asphaltic sands by counter-current hydrocarbon vapors
US4120357A (en) * 1977-10-11 1978-10-17 Chevron Research Company Method and apparatus for recovering viscous petroleum from thick tar sand
US4697642A (en) * 1986-06-27 1987-10-06 Tenneco Oil Company Gravity stabilized thermal miscible displacement process
US5022466A (en) * 1989-01-03 1991-06-11 Mobil Oil Corporation Method for steam flooding profile control
US5052487A (en) * 1989-12-29 1991-10-01 Chevron Research & Technology Company Sequential injection foam process for enhanced oil recovery
US5390740A (en) * 1993-12-17 1995-02-21 Texaco Inc. Method and apparatus to recycle production well casing vapor
US6536523B1 (en) 1997-01-14 2003-03-25 Aqua Pure Ventures Inc. Water treatment process for thermal heavy oil recovery
US20030127400A1 (en) * 1997-01-14 2003-07-10 Steve Kresnyak Water treatment process for thermal heavy oil recovery
US6984292B2 (en) 1997-01-14 2006-01-10 Encana Corporation Water treatment process for thermal heavy oil recovery
US6305472B2 (en) 1998-11-20 2001-10-23 Texaco Inc. Chemically assisted thermal flood process
US6372123B1 (en) 2000-06-26 2002-04-16 Colt Engineering Corporation Method of removing water and contaminants from crude oil containing same
US6662872B2 (en) 2000-11-10 2003-12-16 Exxonmobil Upstream Research Company Combined steam and vapor extraction process (SAVEX) for in situ bitumen and heavy oil production
US6708759B2 (en) 2001-04-04 2004-03-23 Exxonmobil Upstream Research Company Liquid addition to steam for enhancing recovery of cyclic steam stimulation or LASER-CSS
US6769486B2 (en) 2001-05-31 2004-08-03 Exxonmobil Upstream Research Company Cyclic solvent process for in-situ bitumen and heavy oil production
US7363973B2 (en) 2001-06-21 2008-04-29 N Solv Corp Method and apparatus for stimulating heavy oil production
US20050145383A1 (en) * 2001-06-21 2005-07-07 John Nenniger Method and apparatus for stimulating heavy oil production
US7464756B2 (en) 2004-03-24 2008-12-16 Exxon Mobil Upstream Research Company Process for in situ recovery of bitumen and heavy oil
US20050211434A1 (en) * 2004-03-24 2005-09-29 Gates Ian D Process for in situ recovery of bitumen and heavy oil
US9085972B1 (en) * 2005-06-20 2015-07-21 Gilman A. Hill Integrated in situ retorting and refining of heavy-oil and tar sand deposits
US7640987B2 (en) 2005-08-17 2010-01-05 Halliburton Energy Services, Inc. Communicating fluids with a heated-fluid generation system
US7809538B2 (en) 2006-01-13 2010-10-05 Halliburton Energy Services, Inc. Real time monitoring and control of thermal recovery operations for heavy oil reservoirs
US20100163229A1 (en) * 2006-06-07 2010-07-01 John Nenniger Methods and apparatuses for sagd hydrocarbon production
US8596357B2 (en) 2006-06-07 2013-12-03 John Nenniger Methods and apparatuses for SAGD hydrocarbon production
US20100096147A1 (en) * 2006-07-19 2010-04-22 John Nenniger Methods and Apparatuses For Enhanced In Situ Hydrocarbon Production
US8776900B2 (en) 2006-07-19 2014-07-15 John Nenniger Methods and apparatuses for enhanced in situ hydrocarbon production
US7832482B2 (en) 2006-10-10 2010-11-16 Halliburton Energy Services, Inc. Producing resources using steam injection
US7770643B2 (en) 2006-10-10 2010-08-10 Halliburton Energy Services, Inc. Hydrocarbon recovery using fluids
US20080261835A1 (en) * 2007-04-23 2008-10-23 Paul Daniel Berger Surfactant based compositions and process for heavy oil recovery
US8752623B2 (en) 2010-02-17 2014-06-17 Exxonmobil Upstream Research Company Solvent separation in a solvent-dominated recovery process
US8684079B2 (en) 2010-03-16 2014-04-01 Exxonmobile Upstream Research Company Use of a solvent and emulsion for in situ oil recovery
US8899321B2 (en) 2010-05-26 2014-12-02 Exxonmobil Upstream Research Company Method of distributing a viscosity reducing solvent to a set of wells

Similar Documents

Publication Publication Date Title
US3528501A (en) Recovery of oil from oil shale
US3542131A (en) Method of recovering hydrocarbons from oil shale
US3515213A (en) Shale oil recovery process using heated oil-miscible fluids
US3554285A (en) Production and upgrading of heavy viscous oils
US3333637A (en) Petroleum recovery by gas-cock thermal backflow
US3501201A (en) Method of producing shale oil from a subterranean oil shale formation
US3292702A (en) Thermal well stimulation method
US3593790A (en) Method for producing shale oil from an oil shale formation
US3438439A (en) Method for plugging formations by production of sulfur therein
US3513914A (en) Method for producing shale oil from an oil shale formation
US3351132A (en) Post-primary thermal method of recovering oil from oil wells and the like
US3149670A (en) In-situ heating process
US3322194A (en) In-place retorting of oil shale
US3221813A (en) Recovery of viscous petroleum materials
US3342258A (en) Underground oil recovery from solid oil-bearing deposits
US3358756A (en) Method for in situ recovery of solid or semi-solid petroleum deposits
Thomas Enhanced oil recovery-an overview
US3072187A (en) Production and upgrading of hydrocarbons in situ
US2819761A (en) Process of removing viscous oil from a well bore
US3120264A (en) Recovery of oil by in situ combustion
US5005645A (en) Method for enhancing heavy oil production using hydraulic fracturing
US5215146A (en) Method for reducing startup time during a steam assisted gravity drainage process in parallel horizontal wells
US4494605A (en) Sand control employing halogenated, oil soluble hydrocarbons
US4324291A (en) Viscous oil recovery method
US4640352A (en) In-situ steam drive oil recovery process

Legal Events

Date Code Title Description
AS Assignment

Owner name: CHEVRON RESEARCH COMPANY, SAN FRANCISCO, CA. A COR

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:GULF RESEARCH AND DEVELOPMENT COMPANY, A CORP. OF DE.;REEL/FRAME:004610/0801

Effective date: 19860423

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:GULF RESEARCH AND DEVELOPMENT COMPANY, A CORP. OF DE.;REEL/FRAME:004610/0801