EP1125037A1 - Procede d'application sequentielle d'un drainage par gravite au moyen de la vapeur a des parties adjacentes d'un gisement de petrole - Google Patents

Procede d'application sequentielle d'un drainage par gravite au moyen de la vapeur a des parties adjacentes d'un gisement de petrole

Info

Publication number
EP1125037A1
EP1125037A1 EP99952188A EP99952188A EP1125037A1 EP 1125037 A1 EP1125037 A1 EP 1125037A1 EP 99952188 A EP99952188 A EP 99952188A EP 99952188 A EP99952188 A EP 99952188A EP 1125037 A1 EP1125037 A1 EP 1125037A1
Authority
EP
European Patent Office
Prior art keywords
section
steam
sagd
reservoir
oil
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Withdrawn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
EP99952188A
Other languages
German (de)
English (en)
Inventor
William Keith Alberta Research Council GOOD
Rick W. Alberta Research Council LUHNING
Kenneth E. Kisman
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.)
Alberta Oil Sands Technology and Research Authority
Original Assignee
Alberta Oil Sands Technology and Research Authority
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 Alberta Oil Sands Technology and Research Authority filed Critical Alberta Oil Sands Technology and Research Authority
Publication of EP1125037A1 publication Critical patent/EP1125037A1/fr
Withdrawn legal-status Critical Current

Links

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
    • E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
    • E21B43/2406—Steam assisted gravity drainage [SAGD]
    • 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
    • E21B43/2406—Steam assisted gravity drainage [SAGD]
    • E21B43/2408—SAGD in combination with other methods

Definitions

  • This invention relates to recovering heavy oil from an underground reservoir using a staged process involving, in the first stage, steam assisted gravity drainage, and in the second stage, non-condensible gas injection and reservoir pressurization.
  • SAGD Steam assisted gravity drainage
  • UTF Underground Test Facility
  • AOSTRA Alberta Oil Sands Technology and Research Authority
  • the upper well was used to inject steam and the lower well was used to produce a product mixture of heated oil and condensed water.
  • the chamber extended along the length of the horizontal portions of the well pair. Oil that had originally filled the chamber sand was heated, to mobilize it, and drained, along with condensed water, down to the production well, through which they were removed.
  • the chamber was thus filled with steam and was permeable to liquid flow. Newly injected steam moved through the chamber and supplied heat to its peripheral surface, thereby enlarging the chamber upwardly and outwardly as the oil was mobilized and drained together with the condensed water down to the production well.
  • This process is described in greater detail in Canadian patent 1 ,304,287 (Edmunds, Haston and Cordell). The process was shown to be commercially viable and is now being tested by several oil companies in a significant number of pilot projects.
  • the Kisman patent teaches injecting a non-condensible gas, such as natural gas, into the more depleted section to raise its pressure and equalize it with the pressure in the relatively undepleted section. By this means, the loss of steam from the one section to the other can be curtailed or minimized.
  • the Kisman patent further teaches that pressurizing the more depleted section with natural gas has been characterized by an increase in production rate from that section, if the production well penetrating the section is produced during pressurization.
  • Each section is penetrated by one or more wells completed for SAGD operation, preferably one or more pairs of horizontal injection and production wells.
  • the process comprises: (a) injecting steam into the first section of the reservoir to practice SAGD and produce contained oil, until the steam/oil ratio rises sufficiently so that further production by SAGD from the section is substantially uneconomic; (b) then reducing or terminating steam injection into the first section and injecting non-condensible gas into the section to maintain it pressurized; (c) continuing to produce oil from the first section while it is pressurized; and (d) concurrently with step (c), injecting steam into the adjacent second section to practice SAGD therein and produce contained oil; (e) while preferably maintaining the first section pressurized to substantially the same pressure as exists in the second section during step (d).
  • Steps (b) and (c) constitute a post-steam wind-down of oil production from the first section. Over time, oil production rate will drop off during wind- down and eventually it will again become uneconomic to justify continuing to produce the first section. However it may still be desirable to continue maintaining pressurization in the first section to limit steam loss from the second section.
  • the process provides a strategy for sequentially producing adjacent sections across the reservoir. It takes advantage of gas pressurization to prevent steam leakage from a less depleted section undergoing SAGD to a mature, more depleted section. It also maximizes production from each section by subjecting it to sequential SAGD and pressurization production stages.
  • DESCRIPTION OF THE PREFERRED EMBODIMENT comprises: (a) directionally drilling one or more pairs of wells from ground surface into a reservoir first section, to provide generally parallel, horizontal, co-extensive, spaced apart, upper and lower well portions extending through the section, and completing the wells for SAGD production; (b) establishing fluid communication between the injection and production wells of each pair, for example by circulating steam through both wells, to heat the span between the wells by heat conduction, and then displacing and draining the oil in the span by injecting steam through the upper injection well and opening the lower production well for production; (c) practising SAGD in the reservoir first section by injecting steam through the injection wells and producing the produced heated oil and condensed water through the production wells while operating said production wells under steam trap control; (d) preparing a second adjoining section of the reservoir for SAGD production by carrying out the provision of wells and establishing fluid communication between the wells of each
  • thermocouples • measuring the downhole temperature at the injection and production wells of an operating pair, using thermocouples; • establishing the temperature differential between the two wells and throttling the production well to maintain the differential at a generally constant value (say 7°);
  • the invention is characterized by the following advantages:
  • a finite steam-producing plant can be applied in sequence to a plurality of adjacent sections of the reservoir, without severe steam loss from a section undergoing SAGD to an adjacent depleted section.

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)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Abstract

Un drainage par gravité au moyen de la vapeur (SAGD) est utilisé dans une première partie d'un gisement de pétrole lourd. Lorsque la production ne devient plus rentable, on arrête l'injection de vapeur dans la première partie. On injecte ensuite du gaz non condensable dans ladite partie pour la pressuriser alors que la production de pétrole résiduel et de condensat de vapeur continue. Concurremment à la pressurisation, on pratique un drainage par gravité au moyen de la vapeur dans une partie adjacente du gisement. Ainsi, on récupère une partie du pétrole résiduel dans la première partie et on minimise la perte de vapeur de la deuxième partie à la première partie.
EP99952188A 1998-10-26 1999-10-26 Procede d'application sequentielle d'un drainage par gravite au moyen de la vapeur a des parties adjacentes d'un gisement de petrole Withdrawn EP1125037A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CA002251157A CA2251157C (fr) 1998-10-26 1998-10-26 Processus permettant d'appliquer sequentiellement le sagd aux sections adjacentes d'un gisement de petrole
CA2251157 1998-10-26
PCT/CA1999/000996 WO2000025002A1 (fr) 1998-10-26 1999-10-26 Procede d'application sequentielle d'un drainage par gravite au moyen de la vapeur a des parties adjacentes d'un gisement de petrole

Publications (1)

Publication Number Publication Date
EP1125037A1 true EP1125037A1 (fr) 2001-08-22

Family

ID=4162935

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99952188A Withdrawn EP1125037A1 (fr) 1998-10-26 1999-10-26 Procede d'application sequentielle d'un drainage par gravite au moyen de la vapeur a des parties adjacentes d'un gisement de petrole

Country Status (3)

Country Link
EP (1) EP1125037A1 (fr)
CA (1) CA2251157C (fr)
WO (1) WO2000025002A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2351148C (fr) 2001-06-21 2008-07-29 John Nenniger Methode et appareil pour ameliorer la production d'hydrocarbures lourds
CA2549614C (fr) * 2006-06-07 2014-11-25 N-Solv Corporation Methodes et appareillage de production d'hydrocarbures a dgmv
CA2552482C (fr) 2006-07-19 2015-02-24 N-Solv Corporation Methodes et appareillage permettant d'ameliorer la production d'hydrocarbures in situ
CN101122224B (zh) * 2006-08-11 2010-07-28 中国石油天然气股份有限公司 一种厚层普通稠油油藏的重力辅助蒸汽驱开采方法
US7909094B2 (en) 2007-07-06 2011-03-22 Halliburton Energy Services, Inc. Oscillating fluid flow in a wellbore
CA2631977C (fr) 2008-05-22 2009-06-16 Gokhan Coskuner Procede thermique in situ de recuperation du petrole de sables bitumineux
US9551207B2 (en) 2011-05-19 2017-01-24 Jason Swist Pressure assisted oil recovery
CN102268983B (zh) * 2011-06-23 2015-03-25 李剑 一种浅油藏提高稠油采收率的混合开采方法
CA2762451C (fr) 2011-12-16 2019-02-26 Imperial Oil Resources Limited Methode et systeme de prelevement de fluides dans un reservoir
CA2780670C (fr) 2012-06-22 2017-10-31 Imperial Oil Resources Limited Amelioration de la recuperation a partir d'un reservoir d'hydrocarbures de subsurface
CN104265253B (zh) * 2014-08-06 2017-01-11 中国石油天然气股份有限公司 稠油油藏sagd开采方法
CA2972203C (fr) 2017-06-29 2018-07-17 Exxonmobil Upstream Research Company Solvant de chasse destine aux procedes ameliores de recuperation
CA2974712C (fr) 2017-07-27 2018-09-25 Imperial Oil Resources Limited Methodes ameliorees de recuperation d'hydrocarbures visqueux d'une formation souterraine comme etape qui suit des procedes de recuperation thermique
CA2978157C (fr) 2017-08-31 2018-10-16 Exxonmobil Upstream Research Company Methodes de recuperation thermique servant a recuperer des hydrocarbures visqueux d'une formation souterraine
CA2983541C (fr) 2017-10-24 2019-01-22 Exxonmobil Upstream Research Company Systemes et methodes de surveillance et controle dynamiques de niveau de liquide

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1463444A (fr) * 1975-06-13 1977-02-02
US4166504A (en) * 1978-08-24 1979-09-04 Texaco Inc. High vertical conformance steam drive oil recovery method
US4903768A (en) * 1989-01-03 1990-02-27 Mobil Oil Corporation Method for profile control of enhanced oil recovery
CA2015460C (fr) * 1990-04-26 1993-12-14 Kenneth Edwin Kisman Procede de confinement de la vapeur injectee dans un reservoir d'huile lourde
CA2055549C (fr) * 1991-11-14 2002-07-23 Tee Sing Ong Extraction d'hydrocarbures de reservoirs de petrole lourd ou de sables bitumineux

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0025002A1 *

Also Published As

Publication number Publication date
WO2000025002A1 (fr) 2000-05-04
CA2251157C (fr) 2003-05-27
CA2251157A1 (fr) 2000-04-26

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