EP2022936A1 - Procédé de solvant assisté pour mobiliser un pétrole brut visqueux - Google Patents

Procédé de solvant assisté pour mobiliser un pétrole brut visqueux Download PDF

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Publication number
EP2022936A1
EP2022936A1 EP07113850A EP07113850A EP2022936A1 EP 2022936 A1 EP2022936 A1 EP 2022936A1 EP 07113850 A EP07113850 A EP 07113850A EP 07113850 A EP07113850 A EP 07113850A EP 2022936 A1 EP2022936 A1 EP 2022936A1
Authority
EP
European Patent Office
Prior art keywords
crude oil
methane
solvent
steam
bitumen
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.)
Withdrawn
Application number
EP07113850A
Other languages
German (de)
English (en)
Inventor
Peter Bakker
Chia-Fu Hsu
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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
Application filed by Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Priority to EP07113850A priority Critical patent/EP2022936A1/fr
Publication of EP2022936A1 publication Critical patent/EP2022936A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK 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
    • E21B43/166—Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium
    • E21B43/168—Injecting a gaseous medium
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK 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

  • the invention relates to a solvent assisted method to mobilize viscous crude oil in a viscous crude oil containing formation.
  • a steam soak method comprises the steps of:
  • the method according to the invention is based on the insight that a viscous crude oil generally comprises at least a small fraction methane, which reduces the viscosity of the viscous crude oil and that the injected steam tends to mobilize the methane, thereby stripping the crude oil and leaving an even more viscous methane depleted crude oil in the formation.
  • a methane containing solvent is injected into the viscous crude oil to counteract the depletion of methane and/or increase the methane content of the crude oil such that the viscosity of the crude oil is reduced in an optimum manner.
  • the solvent comprises at least 75% methane (CH 4 ) on a molar basis.
  • the steam stimulation method is a cyclic steam stimulation method, comprising the sequence of steps of:
  • the methane containing solvent preferably is injected into the well before step a).
  • the viscous crude oil may comprise bitumen, which has a lower viscosity if methane is dissolved in the bitumen.
  • the viscosity of bitumen in which methane is dissolved may be less than 55 cp at 8.73 MPa and the viscosity of methane-depleted bitumen may be more than 65 cp at 3.55Mpa.
  • Fig.1 illustrates that the viscosity of bitumen in the Peace River formation in Canada can be reduced by adding methane. The higher the saturation pressure the more methane will be dissolved in the bitumen.
  • Fig.2 is a forecast based on computer simulations, in which the continuous line 2 depicts the oil to steam ratio improvement of the method according to the invention, wherein methane is injected prior to each steam soaking step such that at least part of the bitumen in the reservoir is saturated with methane, compared to a traditional steam soak method without solvent injection, wherein after a few steam soak cycles the bitumen in the reservoir is substantially methane depleted, which is depicted by the broken line 3.
  • Fig.3 is a forecast based on computer simulations, which shows the steam injection and crude oil production rates of a traditional steam soak without solvent injection and a steam soak method with solvent injection in accordance with the invention.
  • the broken lines 4 and 5 depict the steam injection and crude oil production rates of a traditional steam soak process, without solvent injection and the continuous lines 6 and 7 depict the steam injection and crude oil production rates of the solvent assisted steam soak method according to the invention.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
EP07113850A 2007-08-06 2007-08-06 Procédé de solvant assisté pour mobiliser un pétrole brut visqueux Withdrawn EP2022936A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07113850A EP2022936A1 (fr) 2007-08-06 2007-08-06 Procédé de solvant assisté pour mobiliser un pétrole brut visqueux

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07113850A EP2022936A1 (fr) 2007-08-06 2007-08-06 Procédé de solvant assisté pour mobiliser un pétrole brut visqueux

Publications (1)

Publication Number Publication Date
EP2022936A1 true EP2022936A1 (fr) 2009-02-11

Family

ID=38830976

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07113850A Withdrawn EP2022936A1 (fr) 2007-08-06 2007-08-06 Procédé de solvant assisté pour mobiliser un pétrole brut visqueux

Country Status (1)

Country Link
EP (1) EP2022936A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102080523A (zh) * 2011-01-06 2011-06-01 中国石油化工股份有限公司 蒸汽与油溶性降粘剂复合吞吐采油方法
US8602098B2 (en) 2010-02-16 2013-12-10 Exxonmobil Upstream Research Company Hydrate control in a cyclic solvent-dominated hydrocarbon 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
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

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3908762A (en) * 1973-09-27 1975-09-30 Texaco Exploration Ca Ltd Method for establishing communication path in viscous petroleum-containing formations including tar sand deposits for use in oil recovery operations
US4099568A (en) * 1974-02-15 1978-07-11 Texaco Inc. Method for recovering viscous petroleum
US4121661A (en) * 1977-09-28 1978-10-24 Texas Exploration Canada, Ltd. Viscous oil recovery method
US4141415A (en) * 1977-07-01 1979-02-27 Texaco Inc. Method of recovering hydrocarbons by improving the vertical conformance in heavy oil formations
US4513819A (en) * 1984-02-27 1985-04-30 Mobil Oil Corporation Cyclic solvent assisted steam injection process for recovery of viscous oil
US20030015321A1 (en) * 2001-05-31 2003-01-23 Lim Git B. Cyclic solvent process for in-situ bitumen and heavy oil production
US20070199712A1 (en) * 2006-02-27 2007-08-30 Grant Hocking Enhanced hydrocarbon recovery by steam injection of oil sand formations

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3908762A (en) * 1973-09-27 1975-09-30 Texaco Exploration Ca Ltd Method for establishing communication path in viscous petroleum-containing formations including tar sand deposits for use in oil recovery operations
US4099568A (en) * 1974-02-15 1978-07-11 Texaco Inc. Method for recovering viscous petroleum
US4141415A (en) * 1977-07-01 1979-02-27 Texaco Inc. Method of recovering hydrocarbons by improving the vertical conformance in heavy oil formations
US4121661A (en) * 1977-09-28 1978-10-24 Texas Exploration Canada, Ltd. Viscous oil recovery method
US4513819A (en) * 1984-02-27 1985-04-30 Mobil Oil Corporation Cyclic solvent assisted steam injection process for recovery of viscous oil
US20030015321A1 (en) * 2001-05-31 2003-01-23 Lim Git B. Cyclic solvent process for in-situ bitumen and heavy oil production
US20070199712A1 (en) * 2006-02-27 2007-08-30 Grant Hocking Enhanced hydrocarbon recovery by steam injection of oil sand formations

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8602098B2 (en) 2010-02-16 2013-12-10 Exxonmobil Upstream Research Company Hydrate control in a cyclic solvent-dominated hydrocarbon recovery process
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
CN102080523A (zh) * 2011-01-06 2011-06-01 中国石油化工股份有限公司 蒸汽与油溶性降粘剂复合吞吐采油方法

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