EP2009231A1 - Verfahren zur Produktion von Rohöl - Google Patents

Verfahren zur Produktion von Rohöl Download PDF

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Publication number
EP2009231A1
EP2009231A1 EP07111358A EP07111358A EP2009231A1 EP 2009231 A1 EP2009231 A1 EP 2009231A1 EP 07111358 A EP07111358 A EP 07111358A EP 07111358 A EP07111358 A EP 07111358A EP 2009231 A1 EP2009231 A1 EP 2009231A1
Authority
EP
European Patent Office
Prior art keywords
well
cavity
crude oil
water
upper section
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Withdrawn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
EP07111358A
Other languages
English (en)
French (fr)
Inventor
Wilhelmus Hubertus Paulus Maria Heijnen
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 EP07111358A priority Critical patent/EP2009231A1/de
Publication of EP2009231A1 publication Critical patent/EP2009231A1/de
Withdrawn legal-status Critical Current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
    • E21B43/14—Obtaining from a multiple-zone well
    • 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
    • E21B43/162—Injecting fluid from longitudinally spaced locations in injection well
    • 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
    • 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
    • E21B43/18—Repressuring or vacuum methods
    • 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
    • E21B43/20—Displacing by water
    • 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
    • E21B43/34—Arrangements for separating materials produced by the well
    • E21B43/38—Arrangements for separating materials produced by the well in the well

Definitions

  • the invention relates to a method of producing crude oil from a crude oil containing formation.
  • Gas lift injection systems and ESP's comprise wear prone components that require regular inspection, maintenance and/or replacement, which is a time consuming and expensive procedure, which may render crude oil production unecomical, in particular if the crude oil comprises fines and/or acidic components, such as hydrogen sulphide and/or carbon dioxide.
  • the estimated lifetime of an ESP may be less than 500 days, after which a work over is required to replace the pump.
  • sour gases such as hydrogen sulphide
  • the cavity may be created in one or more salt layers surrounding the well in an upper section of the well located between the crude oil containing formation and the wellhead, for example by injecting water from the upper section of the well through perforations in a well casing into one or more of the salt layers, thereby leaching salt into the injected flux of water.
  • the produced crude oil may be associated with gas comprising hydrogen sulphide and the associated gas may be treated in a vessel containing a hydrogen sulphide scavenger, such as a sulferox scrubber, which vessel is located in a gas transportation conduit located between the wellhead and the flare.
  • a hydrogen sulphide scavenger such as a sulferox scrubber
  • step h) water may be pumped from the cavern by inserting a hose or other conduit carrying at its lower end a pump through the wellhead into the upper section of the well, and pumping water from upper section of the well until the upper section of the well and the flow channel and cavity are substantially dry.
  • an oxygen depleted inert gas may be injected into the upper section of the well, which oxygen depleted inert gas may comprise at least 90 vol% nitrogen.
  • the valve in the wellbore between the oil containing earth layer and the salt cavern may be a one way valve, which permits fluid to flow from a lower section of the well traversing the crude oil containing earth layer, and the upper section of the well, and which inhibits fluid to flow from the upper into the lower section of the well.
  • FIG.1 shows a wellbore 1 that penetrates a sour crude oil, methane (CH 4 ), hydrogen sulphide(H2S) and water containing earth layer 2.
  • a casing 3 has been cemented within the wellbore 1 such that sour crude influx from the earth layer into the wellbore 1 is inhibited.
  • the casing 3 comprises a perforated section 3A, 3B that is located in a region above the crude oil containing earth layer 2 where the wellbore 1 traverses a series of salt layers 4, which are also identified as halite layers.
  • a water injection tube 6 has been inserted into the wellbore 1, which tube 6 carries a movable packer 7 near its lower end.
  • the packer is located adjacent to the perforated section 3A, 3B of the casing 3, such that when fresh water is injected through the water injection tube 6, the injected water is pumped through the perforations 3A below the movable packer 7 into the lowermost salt layer 4, thereby leaching a cavity 8A in this salt layer 4 and the water and leached salt mixture returns to surface through the perforations 3B above the packer 7 and through an annular space 9 between the casing 3 and water injection tube 6, as indicated by arrows 10.
  • Fig. 2 shows the completed wellbore 1 after retrieval of the water injection tubing 6, wherein a mixture of sour crude oil, CH 4 , H S S and water flows through perforations 12 in the casing adjacent to the sour crude oil, CH 4 , H S S and water containing earth layer 2.
  • the produced mixture flows through a one way check valve 13 up through the wellbore 1 and through the perforated casing sections 3A and 3B into the cavity 8 in the salt layer(s) 4 as illustrated by arrows 14.
  • the gaseous components CH 4 and H 2 S predominantly flow up through the wellbore 1 via the well head 15 and a gas discharge conduit 16 into a gas treating unit 17 in which H 2 S is removed from the produced methane CH 4 and from which the purified methane CH 4 may be discharged into a gas production pipe or a flare 18.
  • the cavity 8 performs as a gravity separation vessel in which crude oil and water will be separated by gravity forces and an upper layer of crude oil 20 will float on top of a lower layer of water (H 2 O) 21.
  • FIG.3 shows how a water injection tube 30 is inserted through the wellhead 15 into the wellbore 1 such that water is injected through the perforated sections 3A, 3B of the casing 3 into the cavity 8.
  • the one way check valve 13 prevents that the injected water reaches the perforations 12 in the lower inflow region of the wellbore 1.
  • the injected flux of water pushes the crude oil layer 20 that floats on top of the water layer 21 to flow up through the wellbore 1 via the wellhead 15 into a crude oil discharge conduit 31.
  • the discharge conduit 31 may be connected to an oil production pipeline or to a crude oil collecting tank, from which the collected crude oil may be discharged by a road tanker.
  • FIG.4 shows how after discharging the crude oil from the wellbore 1 water is pumped out of the wellbore 1 by a submerged pump 41, which is suspended at the lower end of a water discharge hose 42, while at the same time nitrogen (N 2 ) is injected into the wellbore 1 via a nitrogen feed conduit 43, such that after removal of the water the cavern is substantially filled with nitrogen (N 2 ) at an ambient atmospheric pressure of about 1 bar.
  • the cyclic production of crude oil and water into the cavern 8 and subsequent injection of water and nitrogen into the cavern 8 as illustrated in FIG.2-4 is cyclically repeated until at least a substantial part of the crude oil has been produced from the earth layer 2.
  • the method according to the invention permits production of crude oil such that a relatively low hydrostatic pressure is maintained in the wellbore 1 and a low bottom hole pressure (BHP) permits production of a large flux of crude oil from the crude oil containing earth layer 2, without using a corrosion prone permanently installed electrical submersible pump(ESP).
  • BHP bottom hole pressure

Landscapes

  • 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)
EP07111358A 2007-06-29 2007-06-29 Verfahren zur Produktion von Rohöl Withdrawn EP2009231A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07111358A EP2009231A1 (de) 2007-06-29 2007-06-29 Verfahren zur Produktion von Rohöl

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07111358A EP2009231A1 (de) 2007-06-29 2007-06-29 Verfahren zur Produktion von Rohöl

Publications (1)

Publication Number Publication Date
EP2009231A1 true EP2009231A1 (de) 2008-12-31

Family

ID=38702020

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07111358A Withdrawn EP2009231A1 (de) 2007-06-29 2007-06-29 Verfahren zur Produktion von Rohöl

Country Status (1)

Country Link
EP (1) EP2009231A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105781506A (zh) * 2014-12-19 2016-07-20 中国石油天然气股份有限公司 一种油井分层注水的方法
CN106150460A (zh) * 2016-08-25 2016-11-23 中国石油天然气股份有限公司 一种注水井分层测调工艺装置及其测调方法
WO2021119115A1 (en) * 2019-12-10 2021-06-17 Saudi Arabian Oil Company Production cavern

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3739851A (en) * 1971-11-24 1973-06-19 Shell Oil Co Method of producing oil from an oil shale formation
US4016930A (en) * 1975-10-23 1977-04-12 Arnold James F Oil well producing method and system
US4034812A (en) * 1975-07-28 1977-07-12 Texaco Inc. Method for recovering viscous petroleum from unconsolidated mineral formations
US4456065A (en) * 1981-08-20 1984-06-26 Elektra Energie A.G. Heavy oil recovering
EP0517597A1 (de) * 1991-06-05 1992-12-09 Société Française de Stockage Géologique "GEOSTOCK" (Société à responsabilité limitée) Verfahren zur Förderung von Kohlenwasserstoffen, unterirdischer Hohlraum zur Durchführung des Verfahrens und anderweitige Verwendung dieses Hohlraumes
GB2384508A (en) * 1999-04-16 2003-07-30 Halliburton Energy Serv Inc Downhole separator for use in a subterrranean well and method
WO2003091133A1 (en) * 2002-04-25 2003-11-06 Conocophillips Company Petroleum production utilizing a salt cavern
WO2005049964A1 (en) * 2003-11-17 2005-06-02 Cdx Gas, Llc Multi-purpose well bores and method for accessing a subterranean zone from the surface

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3739851A (en) * 1971-11-24 1973-06-19 Shell Oil Co Method of producing oil from an oil shale formation
US4034812A (en) * 1975-07-28 1977-07-12 Texaco Inc. Method for recovering viscous petroleum from unconsolidated mineral formations
US4016930A (en) * 1975-10-23 1977-04-12 Arnold James F Oil well producing method and system
US4456065A (en) * 1981-08-20 1984-06-26 Elektra Energie A.G. Heavy oil recovering
EP0517597A1 (de) * 1991-06-05 1992-12-09 Société Française de Stockage Géologique "GEOSTOCK" (Société à responsabilité limitée) Verfahren zur Förderung von Kohlenwasserstoffen, unterirdischer Hohlraum zur Durchführung des Verfahrens und anderweitige Verwendung dieses Hohlraumes
GB2384508A (en) * 1999-04-16 2003-07-30 Halliburton Energy Serv Inc Downhole separator for use in a subterrranean well and method
WO2003091133A1 (en) * 2002-04-25 2003-11-06 Conocophillips Company Petroleum production utilizing a salt cavern
WO2005049964A1 (en) * 2003-11-17 2005-06-02 Cdx Gas, Llc Multi-purpose well bores and method for accessing a subterranean zone from the surface

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105781506A (zh) * 2014-12-19 2016-07-20 中国石油天然气股份有限公司 一种油井分层注水的方法
CN105781506B (zh) * 2014-12-19 2018-08-10 中国石油天然气股份有限公司 一种油井分层注水的方法
CN106150460A (zh) * 2016-08-25 2016-11-23 中国石油天然气股份有限公司 一种注水井分层测调工艺装置及其测调方法
CN106150460B (zh) * 2016-08-25 2020-02-07 中国石油天然气股份有限公司 一种注水井分层测调工艺装置及其测调方法
WO2021119115A1 (en) * 2019-12-10 2021-06-17 Saudi Arabian Oil Company Production cavern
US11187044B2 (en) 2019-12-10 2021-11-30 Saudi Arabian Oil Company Production cavern

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