EP0435756B1 - Verfahren und Vorrichtung zur Stimulation einer Untergrundformation durch Injektion eines Fluids aus einer benachbarten Schicht, entlängs von Rissen, ausgehend von einer Bohrung in einer niedrigpermeablen Zwischenschicht - Google Patents

Verfahren und Vorrichtung zur Stimulation einer Untergrundformation durch Injektion eines Fluids aus einer benachbarten Schicht, entlängs von Rissen, ausgehend von einer Bohrung in einer niedrigpermeablen Zwischenschicht Download PDF

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Publication number
EP0435756B1
EP0435756B1 EP90403707A EP90403707A EP0435756B1 EP 0435756 B1 EP0435756 B1 EP 0435756B1 EP 90403707 A EP90403707 A EP 90403707A EP 90403707 A EP90403707 A EP 90403707A EP 0435756 B1 EP0435756 B1 EP 0435756B1
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EP
European Patent Office
Prior art keywords
zone
drain
section
intermediate layer
accordance
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
EP90403707A
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English (en)
French (fr)
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EP0435756A1 (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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    • 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
    • E21B43/25—Methods for stimulating production
    • E21B43/26—Methods for stimulating production by forming crevices or fractures

Definitions

  • the present invention relates to a method for stimulating an underground zone by delayed injection of pressurized fluid from a neighboring zone 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.
  • 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 In certain types of basins, the aquifer is located under the oil zone and separated from it by a very low permeable layer due in particular to the presence of hydrocarbon products heavy and very viscous ("tarmat").
  • the method according to the invention makes it possible to stimulate a reservoir zone of an underground formation, separated from a neighboring zone containing a pressurized fluid by an intermediate layer less permeable than the two zones on either side, by performing a hydraulic fracturing in a deflected drain portion after closing this deflected drain portion to delimit a fracturing zone.
  • the deflected drain is pierced so that over at least part of its length, it crosses the intermediate layer, the method comprising the delayed opening by hydraulic fracturing carried out entirely in this part of the drain, 'at least one communication channel connecting the neighboring area to the reservoir area, so as to promote the drainage of the reservoir area by the pressurized fluid.
  • the method comprises, for example, carrying out from the drain, fractures making an oil zone communicate with an underlying aquifer zone.
  • the method also includes, for example, carrying out from the drain, fractures making an oil zone communicate with a second underlying oil zone.
  • the drain can be pierced in an intermediate layer which is not very permeable. It can also be drilled in a non-oil-bearing intermediate layer.
  • 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 be horizontal.
  • a very low permeability layer 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.
  • This fluid can be water or even a petroleum fluid.
  • 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 deviated drain D (horizontal or slightly inclined relative to the horizontal) so as to remain in the intermediate layer.
  • a deviated drain D horizontal or slightly inclined relative to the horizontal
  • the drain D is drilled, it is provided with a casing or casing C over its entire length.
  • Known sealing means close the annular space between the casing and the drain.
  • the casing C is provided with lateral openings O putting the crossed formations in communication with the interior of the drain D.
  • the drain can be drilled at any time, before the production of the oil zone Z1 or possibly during the production period.
  • zone Z1 requires stimulation
  • fracturing operations are carried out on the intermediate layer from the previously drilled drain D.
  • a tube (not shown) communicating the confined part with a hydraulic system, a fluid is applied under sufficient pressure to fracture the walls until the establishment of communication channels F between the two zones Z1 and Z2.
  • the previous sequence of operations may be repeated at several different points in the drain, so as to widen the fractured area.
  • a blocking block B3 is installed in the casing so as to isolate the drain from the outside environment.
  • the fluid in this case the water of zone Z2, being at a higher pressure and the drain being confined by the obturation block B3, the water enters zone Z1 by the fractures F of casing C and flushes out the oil accumulated in the formation.
  • the drain D is arranged so that it can be used as a production well.
  • the casing C is provided in its part which crosses the production zone Z1, with another portion of length d2 provided with lateral orifices.
  • This other casing portion d2 is, depending on the case, 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 B4 Between the two portions d1 and d2 is disposed a shutter member B4 whose closure can be triggered from the surface installation.
  • the length portion d1 of the casing is fractured, in the same way as in the previous embodiment and the organ is closed B4 so as to isolate from one another the two parts d1 and d2 of the casing.
  • Water from the underlying zone penetrates by fracturing in the production zone Z1 and drives the oil towards the production wells and in particular towards the part d2 of the casing C open to the external environment. The drain thus participates in production.
  • the method according to the invention thus makes it possible to best use the high pressure fluid available in situ for the purpose of stimulating oil production.
  • the position of the vertical and / or horizontal production wells relative to the deflected drains D or vice versa of the drains with respect to the wells according to the order in which they will have been drilled is chosen according to the rules of the art so as to optimize oil production .

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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)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Earth Drilling (AREA)

Claims (10)

  1. Verfahren zum Stimulieren einer Speicherzone einer unterirdischen Formation, die getrennt ist von einer benachbarten ein Fluid unter Druck enthaltenden Zone durch eine Zwischenschicht, die weniger permeabel ist, als die beiden danebenliegenden Zonen, indem man eine hydraulische Frakturierung in einem Teil der abgelenkten Drainbohrung nach Verschluß dieses Teils der abgelenkten Drainbohrung vornimmt, um eine Frakturierungszone zu begrenzen, dadurch gekennzeichnet, daß man die abgelenkte Drainbohrung derart durchbohrt, daß sie auf wenigstens einem Teil ihrer Länge die Zwischenschicht durchsetzt, wobei das Verfahren das verzögerte Öffnen durch hydraulisches Frakturieren umfaßt, welches völlig in diesem Teil der Drainbohrung vorgenommen wird, wobei wenigstens ein Verbindungsweg die dieser Speicherzone benachbarte Zone derart verbindet, daß die Drainage der Speicherzone durch das Fluid unter Druck begünstigt wird.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man ausgehend von der Drainbohrung Frakturierungen vornimmt, die eine erdölhaltige Zone (Z1) und eine darunter befindliche wasserhaltige Zone (Z2) in Verbindung treten läßt.
  3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man ausgehend von der Drainbohrung Frakturierungen durchführt, die eine erdölhaltige Zone (Z1) und eine zweite erdölhaltige darunter befindliche Zone (Z2) in Verbindung treten läßt.
  4. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Drainbohrung (D) durch eine sehr wenig permeable Zwischenschicht gebohrt wird.
  5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die Drainbohrung (D) in eine nicht erdölhaltige Zwischenschicht gebohrt wird.
  6. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die unterirdische Zone (Z1) mit der Oberfläche über wenigstens eine vertikale Produktionsbohrung (P) in Verbindung steht, deren Position relativ zur abgelenkten Drainbohrung zur Optimierung der Produktion gewählt wird.
  7. Verfahren nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß die unterirdische Zone (Z1) mit der Oberfläche über wenigstens ein abgelenktes Produktionsbohrloch in Verbindung steht, dessen Position relativ zur abgelenkten Drainbohrung zur Optimierung der Produktion gewählt wird.
  8. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß man die Drainbohrung in ihrem gebohrten Teil längs der Zwischenschicht derart verschließt, daß man einen Teil der Drainbohrung als Produktionsbohrung verwenden kann.
  9. Vorrichtung zum Stimulieren der Produktion einer Zone dieser Formation durch hydraulische Frakturieungn, die in einem Teil einer abgelenkten Drainbohrung durchgeführt wird, die durch eine unterirdische Formation gebohrt wurde, nach Absperren dieses Teils, erhalten durch intermittierendes Verschließen der Drainbohrung, wobei diese eine Zone von einer benachbarten Zone, die ein Fluid bei einem Druck höher als dem der unterirdischen Zone enthält, durch eine im wesentlichen impermeable Zwischenschicht getrennt ist, die eine in der abgelenkten Drainbohrung angeordnete Leitung, einen Sperrblock dieser Leitung (C), der es ermöglicht, diesen Längenteil gegen außen zu isolieren und Mittel, um hydraulische Frakturierungsdrücke aufzubringen, umfaßt, dadurch gekennzeichnet, daß, da die abgelenkte Drainbohrung in der Zwischenzone durchbohrt ist, die Leitung einen Teil von der Länge (d1), der mit Öffnungen (O) versehen ist, umfaßt und die Vorrichtung Verschlußblöcke (B1, B2) umfaßt, um an ihren gegenüberliegenden Enden Teile der Leitung zu begrenzen, welche den Teil von der Länge (d1) durchsetzt.
  10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß die Leitung (C) einen zweiten Teil von der Länge (d2) umfaßt, der mit Öffnungen in seinem diese unterirdische Zone (Z1) durchsetzenden Teil versehen ist, wobei dieser Teil von der Länge (d2) seitlich bezüglich des ersten Teils von der Länge (d1) in der Zwischenschicht (L) versetzt ist und ein Verschlußblock (B4) in der Leitung (C) zwischen den beiden Teilen von der Länge (d1, d2) angeordnet ist.
EP90403707A 1989-12-29 1990-12-20 Verfahren und Vorrichtung zur Stimulation einer Untergrundformation durch Injektion eines Fluids aus einer benachbarten Schicht, entlängs von Rissen, ausgehend von einer Bohrung in einer niedrigpermeablen Zwischenschicht Expired - Lifetime EP0435756B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8917482 1989-12-29
FR8917482A FR2656651B1 (fr) 1989-12-29 1989-12-29 Methode et dispositif pour stimuler une zone souterraine par injection differee de fluide provenant d'une zone voisine, le long de fractures faites depuis un drain fore dans une couche intermediaire peu permeable.

Publications (2)

Publication Number Publication Date
EP0435756A1 EP0435756A1 (de) 1991-07-03
EP0435756B1 true EP0435756B1 (de) 1994-10-26

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EP90403707A Expired - Lifetime EP0435756B1 (de) 1989-12-29 1990-12-20 Verfahren und Vorrichtung zur Stimulation einer Untergrundformation durch Injektion eines Fluids aus einer benachbarten Schicht, entlängs von Rissen, ausgehend von einer Bohrung in einer niedrigpermeablen Zwischenschicht

Country Status (7)

Country Link
US (1) US5133410A (de)
EP (1) EP0435756B1 (de)
CA (1) CA2033358C (de)
DE (1) DE69013661T2 (de)
DK (1) DK0435756T3 (de)
FR (1) FR2656651B1 (de)
NO (1) NO301091B1 (de)

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US5361856A (en) * 1992-09-29 1994-11-08 Halliburton Company Well jetting apparatus and met of modifying a well therewith
EP0671549A1 (de) * 1994-03-10 1995-09-13 Shell Internationale Researchmaatschappij B.V. Verfahren zur Gewinnung einer Flüssigkeit aus einer Erdformation
US6729394B1 (en) * 1997-05-01 2004-05-04 Bp Corporation North America Inc. Method of producing a communicating horizontal well network
DK174493B1 (da) * 2001-05-22 2003-04-22 Maersk Olie & Gas Fremgangsmåde til styring af injektionsfrakturers udbredelsesretning i permeable formationer
US6796381B2 (en) 2001-11-12 2004-09-28 Ormexla Usa, Inc. Apparatus for extraction of oil via underground drilling and production location
US20090090499A1 (en) * 2007-10-05 2009-04-09 Schlumberger Technology Corporation Well system and method for controlling the production of fluids
US9580998B2 (en) 2009-02-05 2017-02-28 Cft Technologies (Hk) Limited Recovery or storage process
RU2513955C1 (ru) * 2012-11-12 2014-04-20 Общество с ограниченной ответственностью "ЛУКОЙЛ-Инжиниринг" ООО "ЛУКОЙЛ-Инжиниринг" Способ разработки слоистой нефтяной залежи
RU2563463C1 (ru) * 2014-12-02 2015-09-20 Открытое акционерное общество "Татнефть" им. В.Д.Шашина Способ разработки слоистой нефтяной залежи с высоковязкой нефтью
RU2578090C1 (ru) * 2015-02-13 2016-03-20 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Способ разработки нефтяной залежи
RU2599646C1 (ru) * 2015-04-30 2016-10-10 Открытое акционерное общество "Татнефть" им. В.Д.Шашина Способ разработки слоистой карбонатной залежи нефти
RU2584190C1 (ru) * 2015-05-01 2016-05-20 Открытое акционерное общество "Татнефть" им. В.Д.Шашина Способ разработки многопластовой нефтяной залежи
RU2595112C1 (ru) * 2015-09-01 2016-08-20 Публичное акционерное общество "Татнефть" имени В.Д. Шашина Способ разработки нефтяной залежи на поздней стадии разработки
US11203918B2 (en) 2020-02-14 2021-12-21 Saudi Arabian Oil Company Oil well flowback with zero outflow
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Also Published As

Publication number Publication date
DE69013661T2 (de) 1995-03-02
NO301091B1 (no) 1997-09-08
DE69013661D1 (de) 1994-12-01
DK0435756T3 (da) 1994-11-21
NO905594L (no) 1991-07-01
FR2656651A1 (fr) 1991-07-05
CA2033358A1 (fr) 1991-06-30
CA2033358C (fr) 2002-01-22
EP0435756A1 (de) 1991-07-03
US5133410A (en) 1992-07-28
FR2656651B1 (fr) 1995-09-08
NO905594D0 (no) 1990-12-27

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