EP0435727B1 - Verfahren und Vorrichtung zur Stimulation einer Untergrundformation durch Injektion eines Fluids aus einer benachbarten Schicht, die durch eine eine niedrigpermeable Zwischenschicht durchquerende Bohrung mit ersterer verbunden ist - Google Patents

Verfahren und Vorrichtung zur Stimulation einer Untergrundformation durch Injektion eines Fluids aus einer benachbarten Schicht, die durch eine eine niedrigpermeable Zwischenschicht durchquerende Bohrung mit ersterer verbunden ist Download PDF

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Publication number
EP0435727B1
EP0435727B1 EP90403557A EP90403557A EP0435727B1 EP 0435727 B1 EP0435727 B1 EP 0435727B1 EP 90403557 A EP90403557 A EP 90403557A EP 90403557 A EP90403557 A EP 90403557A EP 0435727 B1 EP0435727 B1 EP 0435727B1
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EP
European Patent Office
Prior art keywords
zone
intermediate layer
tube
drain
blocking device
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
EP90403557A
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English (en)
French (fr)
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EP0435727A1 (de
Inventor
Claude Gadelle
Jacques Lessi
Gérard Renard
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IFP Energies Nouvelles IFPEN
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IFP Energies Nouvelles IFPEN
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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
    • E21B43/18—Repressuring or vacuum methods

Definitions

  • the present invention relates to a method for stimulating an underground zone by deferred injection of pressurized fluid from a neighboring zone which is connected to the first by means of a deflected drain passing through an intermediate layer which is very slightly permeable.
  • a deflected drain passing through an intermediate layer which is very slightly permeable.
  • the method according to the invention more particularly makes it possible to stimulate the production of an oil zone separated from an underlying zone containing a pressurized fluid, such as an aquifer zone or possibly oil zone.
  • US-A-2,736,381 relates to the stimulation of a formation by placing in communication with an underlying zone by a vertical well and production by another vertical well laterally offset from the first, drilled through layers of separation.
  • US-A-2,856,000 shows an application of the technique of stimulating an oil formation by controlled communication with an underlying zone containing fluids at a higher pressure.
  • Two wells are drilled, a first well used for the production of the upper zone, the second well, for the production of the lower zone.
  • the second well is equipped with separation means making it possible to separate the liquid effluents and the gaseous effluents and to inject the latter into the upper zone to stimulate production by the other well.
  • the delayed communication of the two zones is carried out by perforating the casing at the level of the two formations.
  • the fluid used is for example pressurized water injected by drains drilled through the formation. It may also be water existing deep in the production basin itself in the form of an underlying aquifer.
  • the aquifer lies beneath the oil zone and separated from it by a layer which is very slightly permeable, in particular due to the presence of heavy and very viscous hydrocarbon products ("tarmat").
  • tarmat heavy and very viscous hydrocarbon products
  • the method according to the invention makes it possible to stimulate the production of an underground zone by deferred injection of a fluid coming from a neighboring zone separated from the first by an intermediate layer which is not very permeable, avoiding the drawbacks mentioned above.
  • the second obturation block is placed at the level of the underground zone in an intermediate position to separate an injection zone from a production zone.
  • the method comprises for example the drilling of a deviated drain drilled through an oil zone of an intermediate zone and an aquifer zone.
  • the method also includes, for example, piercing a deflected drain through an oil zone with an intermediate layer and a second underlying oil zone.
  • the drain is pierced, for example through an intermediate layer which is not very permeable. It can also be pierced through a non-oil-bearing intermediate layer.
  • the implementation device comprises a casing tube disposed in a deviated drain connecting the underground zone and the adjacent zone, this tube comprising a first and a second portion of length provided with openings respectively at each of said zones, a first sealing block arranged in the tube at the level of the intermediate layer and a second sealing block for confining at least part of the tube.
  • the tube comprises, in its part passing through the underground zone, a third portion of length provided with openings, this other portion being laterally offset with respect to the second portion in the underground zone and the second obturation block being disposed in the tube between the first and third portions of the underground area.
  • the oil zone Z1 produces oil by at least one production well P1.
  • This well can be vertical as shown in fig. 1 or alternatively, horizontal.
  • a layer with very little permeability L there is a neighboring zone containing a fluid under pressure.
  • the pressure of this fluid is higher than the pressure prevailing in the production zone Z1 because the neighboring zone is at a greater depth, but above all due to the partial exhaustion of the oil zone resulting from its exploitation.
  • This fluid can be water or even a petroleum fluid.
  • the neighboring area is aquiferous, it is generally of the active type i.e. it is supplied by external water supplies and the pressure which reigns there remains substantially constant.
  • the intermediate layer L can for example be an area made almost impermeable due to the presence of very heavy and viscous hydrocarbon products.
  • This layer L can also be of a non-oil type.
  • the method according to the invention comprises drilling from the surface S of a drain D deflected so as to cross the oil zone Z1 horizontally or at an angle slightly inclined with respect to the horizontal.
  • the direction of drilling is bent so that the drain crosses the poorly permeable layer L and enters the neighboring zone Z2.
  • the drain is drilled, it is provided with a casing or casing C over its entire length.
  • Sealing means of a known type allow the annular space between the casing and the drain to be closed in a sealed manner at the level of the layer L for example.
  • the casing C is provided with lateral openings 01 putting the crossed formations in communication with the interior of the casing C.
  • a BP sealing device of the type known to specialists under the name of "bridge plug” is lowered into the drain into the intermediate layer L. Since the installation of surface, by means of a control device not shown, the first shutter block BP is actuated so as to close any communication between the two zones Z1 and Z2.
  • the drain can be drilled at any time, before the production of the oil zone Z1 or possibly during the production period.
  • the drain D is arranged so that it can be used as a production well.
  • the casing C is provided in its deviated part which crosses the production area, with another portion of length d3 provided with lateral orifices O3.
  • this other casing portion d3 is more or less distant from the portion d1 through which the water coming from the zone Z2 can enter and laterally offset with respect thereto.
  • a shutter member B1 Between the two portions d1 and d3, both open in the zone Z1, is arranged a shutter member B1, the closure of which can be triggered from the surface installation in the same way as the shutter device BP.
  • the BP obturation device is opened and the organ B1 is closed so as to confine the drain D.
  • the water coming from the area under - adjacent Z2 enters the production zone Z1 through the openings in part d1 and drives the oil out towards part d3 of the casing C open to the outside environment.
  • the method according to the invention thus makes it possible to best use the high pressure fluid available at depth for the purpose of stimulating oil production.

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  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Catching Or Destruction (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Claims (6)

  1. Verfahren zum Stimulieren der Produktion einer unterirdischen Zone (Z1), die von einer benachbarten ein Fluid unter Druck enthaltenden Zone (Z2) durch eine Zwischenzone (L) getrennt ist, umfassend:
    - das Bohren wenigstens eines abgelenkten mit einem Ausbaurohr (C) ausgestatten Drains (D), durch die unterirdische Zone, die Zwischenschicht und die benachbarte Zone hindurch, wobei der diese unterirdische Zone durchsetzende Drain sehr stark bezüglich der Vertikalen über wenigstens einen Teil seiner Länge abgelenkt ist, das Ausbaurohr mit einem ersten Block zum intermittierenden Verschließen (BP), der in dem die Zwischenschicht (L) durchsetzenden Rohrteil oder Rohrstück, angeordnet ist und mit einem zweiten Block (B1, B0) zum intermittierenen Verschließen versehen ist, der in dem Teil des Rohres (C) oberhalb der Zwischenschicht angeordnet ist und
    - das verzögerte In-Verbindung-Setzen der benachbarten Zone (Z2) und der unterirdischen Zone (Z1) vermittels des Drains durch Einwirken auf den ersten Schließblock, derart, daß die Drainage dieser unterirdischen Schicht durch dieses Fluid unter Druck begünstigt ist; wobei das Verfahren sich dadurch auszeichnet, daß man den zweiten Schließblock in Höhe der unterirdischen Schicht in einer Zwischenposition anordnet, um eine Injektionszone (d1) von einer Produktionszone (d3) zu trennen.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der abgelenkte Drain durch eine erdölführende Zone, eine Zwischenzone und eine wasserführende Zone hindurch gebohrt wird.
  3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der abgelenkte Drain (D) durch eine erdölführende Zone, eine Zwischenschicht und eine darunter befindliche erdölführende Zone hindurch gebohrt wird.
  4. Verfahren nach einem der vorliegenden Ansprüche, dadurch gekennzeichnet, daß der Drain durch eine sehr wenig permeable Zwischenschicht hindurch gebohrt wird.
  5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß der abgelenkte Drain durch eine Erdöl-nicht-führende Zwischenschicht gebohrt wird.
  6. Vorrichtung zum Stimulieren der Produktion einer unterirdischen Zone (Z1), die von einer benachbarten Fluid, unter einem Druck höher als dem der erdölführenden Zone enthaltenden Zone durch eine sehr wenig permeable Schicht (L) getrennt ist, die ein Ausbaurohr (C) umfaßt, das in einem abgelenkten Drain, der die unterirdische Zone und die benachbarte Zone verbindet, angeordnet ist, wobei dieses Rohr (C) ein erstes und ein zweites Längsstück (d1, d2), die mit Öffnungen (O1, O2) jeweils in Höhe jeder dieser Schichten versehen sind, einen ersten Schließblock (BP) in dem Rohr in Höhe der Zwischenschicht und einen zweiten Schließblock (BO) umfaßt, um wenigstens einen Teil dieses Rohres (C) zu begrenzen, dadurch gekennzeichnet, daß das Rohr (C) in seinem die unterirdische Zone (Z1) durchsetzenden Teil ein drittes mit Öffnungen (O3) versehenes Längsstück (d3) umfaßt, wobei dieses andere Stück oder dieses andere Teil seitlich bezogen auf das zweite Stück oder den zweiten Teil (d2) in der unterirdischen Zone versetzt ist und der zweite Schließblock (B1) in dem Rohr (C) zwischen dem ersten und zweiten Teil der unterirdischen Zone (Z1) angeordnet ist.
EP90403557A 1989-12-29 1990-12-12 Verfahren und Vorrichtung zur Stimulation einer Untergrundformation durch Injektion eines Fluids aus einer benachbarten Schicht, die durch eine eine niedrigpermeable Zwischenschicht durchquerende Bohrung mit ersterer verbunden ist Expired - Lifetime EP0435727B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8917481A FR2656650B1 (fr) 1989-12-29 1989-12-29 Methode et dispositif pour stimuler une zone souterraine par injection controlee de fluide provenant d'une zone voisine que l'on relie a la premiere par un drain traversant une couche intermediaire peu permeable.
FR8917481 1989-12-29

Publications (2)

Publication Number Publication Date
EP0435727A1 EP0435727A1 (de) 1991-07-03
EP0435727B1 true EP0435727B1 (de) 1995-05-24

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EP90403557A Expired - Lifetime EP0435727B1 (de) 1989-12-29 1990-12-12 Verfahren und Vorrichtung zur Stimulation einer Untergrundformation durch Injektion eines Fluids aus einer benachbarten Schicht, die durch eine eine niedrigpermeable Zwischenschicht durchquerende Bohrung mit ersterer verbunden ist

Country Status (7)

Country Link
US (1) US5133411A (de)
EP (1) EP0435727B1 (de)
CA (1) CA2033357C (de)
DE (1) DE69019709T2 (de)
DK (1) DK0435727T3 (de)
FR (1) FR2656650B1 (de)
NO (1) NO301090B1 (de)

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RU2063507C1 (ru) * 1992-12-28 1996-07-10 Акционерное общество закрытого типа "Биотехинвест" Способ добычи газа из пласта, содержащего ловушку
EP0671549A1 (de) * 1994-03-10 1995-09-13 Shell Internationale Researchmaatschappij B.V. Verfahren zur Gewinnung einer Flüssigkeit aus einer Erdformation
WO1999025952A1 (en) * 1997-11-15 1999-05-27 Baker Hughes Incorporated Repressurization of oilfield reservoir for enhanced hydrocarbon recovery
US8056629B2 (en) * 2010-01-07 2011-11-15 GEOSCIENCE Support Services, Inc. Slant well desalination feedwater supply system and method for constructing same
US8479815B2 (en) * 2010-01-07 2013-07-09 GEOSCIENCE Support Services, Inc. Desalination subsurface feedwater supply and brine disposal
CN102900402B (zh) * 2012-11-01 2014-05-07 中国海洋石油总公司 一种海上小规模气藏的开发方法
CN102943654A (zh) * 2012-11-01 2013-02-27 中国海洋石油总公司 利用高含co2气藏提高高含烃气藏采收率的方法
CN102913203B (zh) * 2012-11-01 2014-05-07 中国海洋石油总公司 一种开发低渗透气藏的方法
CN102926719A (zh) * 2012-11-01 2013-02-13 中国海洋石油总公司 一种异常高压气藏的开发方法
RU2520997C1 (ru) * 2013-04-01 2014-06-27 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Способ разработки мелких отдельных нефтяных линз
RU2634754C1 (ru) * 2016-08-16 2017-11-07 Публичное акционерное общество "Акционерная нефтяная Компания "Башнефть" Способ автоматического распределения суммарного потока газа по нагнетательным скважинам при водогазовом методе воздействия на пласт
CN108397173A (zh) 2018-02-07 2018-08-14 中国石油天然气股份有限公司 分层注水系统及分层注水方法

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US2736381A (en) * 1953-10-26 1956-02-28 Texas Co Method of increasing recovery from a subsurface oil or condensate reservoir
US2856000A (en) * 1954-07-20 1958-10-14 Texaco Development Corp Production of hydrocarbons from subsurface reservoirs
US3258069A (en) * 1963-02-07 1966-06-28 Shell Oil Co Method for producing a source of energy from an overpressured formation
US3354952A (en) * 1965-08-09 1967-11-28 Phillips Petroleum Co Oil recovery by waterflooding
US4194580A (en) * 1978-04-03 1980-03-25 Mobil Oil Corporation Drilling technique
US4262747A (en) * 1979-02-26 1981-04-21 Elliott Guy R B In situ recovery of gaseous hydrocarbons and steam
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US4945994A (en) * 1987-12-17 1990-08-07 Standard Alaska Production Company Inverted wellbore completion

Also Published As

Publication number Publication date
US5133411A (en) 1992-07-28
DK0435727T3 (da) 1995-08-07
FR2656650A1 (fr) 1991-07-05
EP0435727A1 (de) 1991-07-03
FR2656650B1 (fr) 1995-09-01
NO905593L (no) 1991-07-01
DE69019709D1 (de) 1995-06-29
NO905593D0 (no) 1990-12-27
CA2033357A1 (fr) 1991-06-30
CA2033357C (fr) 2001-09-11
DE69019709T2 (de) 1995-09-21
NO301090B1 (no) 1997-09-08

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