DE60009861T2 - METHOD FOR DRILLING SECONDARY BRANCH HOLES IN A HOLE HOLE SYSTEM - Google Patents
METHOD FOR DRILLING SECONDARY BRANCH HOLES IN A HOLE HOLE SYSTEM Download PDFInfo
- Publication number
- DE60009861T2 DE60009861T2 DE60009861T DE60009861T DE60009861T2 DE 60009861 T2 DE60009861 T2 DE 60009861T2 DE 60009861 T DE60009861 T DE 60009861T DE 60009861 T DE60009861 T DE 60009861T DE 60009861 T2 DE60009861 T2 DE 60009861T2
- Authority
- DE
- Germany
- Prior art keywords
- borehole
- branch hole
- hole
- expanded
- lining
- 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
Links
- 238000000034 method Methods 0.000 title claims description 20
- 238000005553 drilling Methods 0.000 claims description 17
- 239000012530 fluid Substances 0.000 claims description 16
- 239000004215 Carbon black (E152) Substances 0.000 claims description 14
- 229930195733 hydrocarbon Natural products 0.000 claims description 14
- 150000002430 hydrocarbons Chemical class 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 11
- 239000004576 sand Substances 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000005755 formation reaction Methods 0.000 description 9
- 239000004459 forage Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0035—Apparatus or methods for multilateral well technology, e.g. for the completion of or workover on wells with one or more lateral branches
-
- 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
- E21B43/02—Subsoil filtering
- E21B43/10—Setting of casings, screens, liners or the like in wells
- E21B43/103—Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like
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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)
- Earth Drilling (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Portable Outdoor Equipment (AREA)
- Road Paving Structures (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Description
Hintergrund der Erfindungbackground the invention
Die Erfindung bezieht sich auf ein Verfahren zum Erzeugen von sekundären Abzweigungslöchern in einem Bohrlochsystem, das ein Hauptbohrloch aufweist, in das ein oder mehrere primäre Abzweigungslöcher münden.The invention relates to a Process for creating secondary branch holes in a borehole system having a main borehole into which a or more primary Abzweigungslöcher lead.
Ein solches Bohrlochsystem ist aus der internationalen Patentanmeldung WO 98/49424 bekannt.Such a borehole system is over the international patent application WO 98/49424 known.
Eine Schwierigkeit, die bei einem solchen Bohrlochsystem auftreten kann, besteht darin, daß konventionelle Bohrlöcher teleskopartig ausgebildet sind, was aus der Tatsache herrührt, daß eine Auskleidung in das Hauptbohrloch in verschiedenen Stadien des Bohrverfahrens eingesetzt wird, und daß die Auskleidungsabschnitte, die danach eingesetzt werden, einen kleineren Außendurchmesser haben als der Innendurchmesser der vorher installierten Auskleidungsabschnitte, und daß das Futter, das nachfolgend in das primäre Abzweigungsloch eingesetzt wird, einen Außendurchmesser haben muß, der signifikant kleiner als der Innendurchmesser der Auskleidung des Hauptbohrloches am Abzweigungspunkt ist, um ein glattes Einsetzen des Futters von dem Hauptbohrloch in das primäre Abzweigungsloch zu ermöglichen.A difficulty with one Such a well system can occur that conventional wells are telescopic, which results from the fact that a lining into the main well at various stages of the drilling process is used, and that the lining sections, which are then used have a smaller outer diameter than that Inner diameter of the previously installed lining sections, and that that Lining that is subsequently inserted into the primary branch hole an outer diameter must have, which is significantly smaller than the inner diameter of the lining the main hole is at the junction point for a smooth insertion of the feed from the main borehole into the primary tap hole.
Infolgedessen muß das Futter des primären Abzweigungsloches einen so kleinen Durchmesser haben, daß es kaum möglich und ökonomisch unattraktiv ist, sekundäre Abzweigungslöcher von dem primären Abzweigungsloch weg zu bohren.As a result, the lining of the primary tap hole must have such a small diameter that it is hardly possible and economically unattractive, secondary Abzweigungslöcher from the primary Drill the branch hole away.
Es ist aus dem Artikel „How mulilateral boreholes impact ultimate recovery strategies" in dem Magazin „Offshore", Band 57, Nr. 7, 1. Juli 1997, bekannt, ein vielseitiges Bohrlochsystem mit sekundären Zweigen zu erzeugen, die mit primären Bohrlochzweigen verbunden sind, indem die Zweige als Offenlochbohrun gen ausgekleidet werden. Dieser Artikel illustriert auch, daß rohrförmige Futter und die Y-förmigen Verzweigungspunktfutter in ein vielseitiges Bohrloch eingesetzt werden können, ohne zu offenbaren, wie diese Futter in das Bohrloch eingesetzt werden. Der Artikel „Expandible slotted tubulars offer well design benefits" in dem Magazin „Petroleum Engineer International", Band 69, Nr. 10, 1. Oktober 1996, offenbart, daß ein vielseitiges Bohrlochsystem mit einem Futter mit expandierbaren geschlitzten Rohren versehen werden kann, um das Bohrloch zu stabilisieren und die Bohrlochgröße zu maximieren. Ein Nachteil von expandierbaren geschlitzten Rohren besteht darin, daß sie keine fluiddichte Abdichtung zwischen dem Inneren und dem Äußeren des Bohrloches ergeben.It is from the article "How mulilateral boreholes impact ultimate recovery strategies "in the magazine" Offshore ", Volume 57, No. 7, July 1, 1997, to produce a versatile well system with secondary branches that with primary Borehole branches are connected by the branches as open hole drilling to be lined. This article also illustrates that tubular linings and the Y-shaped ones Branch point chuck inserted into a versatile borehole can be without revealing how these chucks are used in the borehole. The article “Expandible slotted tubulars offer well design benefits "in the magazine" Petroleum Engineer International ", Volume 69, No. 10, October 1, 1996, discloses that a versatile borehole system with a lining with expandable slotted pipes can be provided to stabilize the borehole and maximize the borehole size. On Disadvantage of expandable slotted tubes is that they do not fluid tight seal between the inside and the outside of the Drill hole result.
Ein Ziel der vorliegenden Erfindung besteht darin, ein Verfahren zum Erzeugen eines oder mehrerer sekundärer Abzweigungslöcher in einem Bohrlochsystem auf wirksame und wirtschaftliche Weise zu schaffen.An object of the present invention is a method of creating one or more secondary tap holes in to create a well system in an effective and economical manner.
Zusammenfassung der ErfindungSummary the invention
Gemäß der vorliegenden Erfindung wird ein Verfahren zum Erzeugen eines sekundären Abzweigungsloches in einem Bohrlochsystem zur Förderung von Kohlenwasserstofffluiden geschaffen, welches ein Hauptbohrloch und primäre Abzweigungslöcher aufweist, die in das Hauptbohrloch münden, wobei das Verfahren umfaßt:
- – Einsetzen eines nicht expandierten expandierbaren Futters in das primäre Abzweigungsloch;
- – radiales Expandieren des Futters derart, daß das expandierte Futter eine Bohrlochstahlauskleidung bildet;
- – Erzeugen einer Öffnung in der Wand des expandierten Futters; und
- – Bohren eines sekundären Abzweigungsloches in die Kohlenwasserstofformation durch diese Öffnung.
- Inserting an unexpanded expandable liner into the primary branch hole;
- - radial expansion of the chuck such that the expanded chuck forms a tubular steel liner;
- - creating an opening in the wall of the expanded lining; and
- - Drilling a secondary branch hole in the hydrocarbon formation through this opening.
Vorzugsweise ist das expandierbare Futter ein Stahlfutter, das expandiert wird, indem ein Expansionsdorn durch das Futter hindurchgedrückt oder -gezogen wird, der mit einer konischen verschleißfesten Außenfläche und/oder mit Rollen ausgestattet ist.This is preferably expandable Lining a steel lining that is expanded by an expansion mandrel pushed through the feed or is pulled with a conical wear-resistant Outer surface and / or is equipped with wheels.
Das expandierte Futter hat einen Innendurchmesser, der ausreichend groß ist, um das Bohren und/oder das Einsetzen der Ausrüstung in das primäre Abzweigungsloch zum Bohren eines oder mehrerer sekundärer Abzweigungslöcher zu ermöglichen, die eine Innenweite haben, welche ausreichend groß ist, um als Bohrlochzweig zu dienen, durch welchen Kohlenwasserstofffluide in das Bohrlochsystem einströmen können.The expanded feed has one Inner diameter that is large enough to drill and / or the installation of the equipment in the primary Branch hole for drilling one or more secondary branch holes enable, that have an inside width that is big enough to to serve as a borehole branch through which hydrocarbon fluids flow into the borehole system can.
Somit gestattet das Verfahren gemäß der Erfindung die Erzeugung eines wurzelartigen Bohrlochsystems, das eine optimale Abfuhr von Kohlenwasserstofffluiden aus einer kohlenwasserstoffhältigen Formation gewährleistet, selbst wenn die Formation geringe Durchlässigkeit hat.Thus the method according to the invention allows creating a root-like borehole system that is optimal Removal of hydrocarbon fluids from a hydrocarbon-containing formation guaranteed even if the formation has low permeability.
Bei einem attraktiven Ausführungsbeispiel des Verfahrens gemäß der Erfindung ist das expandierbare Futter durch ein gewundenes Rohr gebildet, durch welches Bohrfluid gegen eine Bohranordnung im Bohrloch gepumpt wird, die dazu verwendet wird, ein primäres Abzweigungsloch zu bohren, und wobei das gewundene Rohr radial expandiert wird, nachdem das primäre Abzweigungsloch gebohrt ist.In an attractive embodiment of the Method according to the invention the expandable lining is formed by a winding tube, through which drilling fluid is pumped against a drilling assembly in the borehole, used to drill a primary tap hole and wherein the coiled tube is expanded radially after the primary Branch hole is drilled.
Das sekundäre Abzweigungsloch kann auch unter Verwendung eines gewundenen Rohres gebohrt werden, um nach dem Beenden der Bohraktivitäten ein expandiertes Futter zu bilden.The secondary branch hole can also be under Use a coiled tube to be drilled to after exiting of drilling activities to form an expanded feed.
Alternativ kann das sekundäre Abzweigungsloch mit einem Futter unter Verwendung eines expandierbaren geschlitzten Futters versehen werden, dessen Schlitze versetzt sind und sich beim Expandieren des Futters zu rautenförmigen Öffnungen erweitern. Ein derartiges expandierbares geschlitztes Futter ist aus dem US-Patent Nr. 5,366,012 bekannt. Ein solches geschlitztes Futter kann im Einströmbereich des sekundären Abzweigungsloches von einem expandierbaren Sandfilter umgeben sein, wie einem Sandfilter, der in der internationalen Patentanmeldung PCT/EP96/ 04887 offenbart ist.Alternatively, the secondary branch hole can be lined using an expandable slotted liner, the slots of which are staggered and expand into diamond-shaped openings as the liner expands. Such an expandable slotted liner is known from US Patent No. 5,366,012. Such a slotted chuck can be surrounded in the inflow area of the secondary branch hole by an expandable sand filter, such as a sand filter, which is disclosed in the international patent application PCT / EP96 / 04887.
In stabilen Vorratsformationen kann das sekundäre Abzweigungsloch ein offenes unausgekleidetes Loch sein, wogegen bei einer sehr unstabilen Vorratsformation das sekundäre Abzweigungsloch mit einem anfänglich nicht geschlitzten, expandierten oder nicht expandierten Futter ausgekleidet werden kann, in welches Perforationen unter Verwendung eines Perforationswerkzeuges geschossen werden, das an sich bekannt ist.In stable stock formations can the secondary Branch hole to be an open bare hole, whereas with a very unstable supply formation, the secondary branch hole with one initially not slotted, expanded or unexpanded lining Can be lined in which perforations are used a perforation tool that is known per se is.
Die Erfindung bezieht sich auch auf ein wurzelartiges Bohrlochsystem, das gemäß der Erfindung ausgebildet wird und das ein Hauptbohrloch aufweist, in welches ein oder mehrere primäre Abzweigungslöcher münden, die ein expandiertes expandierbares Futter aufweisen, wobei das Futter ein Bohrlochstahlfutter bildet, und eines oder mehrere sekundäre Abzweigungslöcher, welche in das primäre Abzweigungsloch bzw. in die primären Abzweigungslöcher über eine oder mehrere Öffnungen in der Wand des expandierten Futters bzw. der expandierten Futter münden.The invention also relates to a root-like borehole system constructed in accordance with the invention and which has a main borehole in which one or more primary Abzweigungslöcher lead, which have an expanded expandable lining, the Lining forms a downhole steel liner and one or more secondary branch holes which in the primary Branch hole or in the primary Branch holes over one or more openings in the wall of the expanded feed or the expanded feed lead.
Es versteht sich, daß es die Verwendung von expandierbaren Rohren in einem vielseitigen Bohrlochsystem ermöglicht, daß die Bohrlochrohre in dem Hauptbohrloch bzw. Mutterbohrloch und in den primären und sekundären Abzweigungslöchern bzw. Bohrlochzweigen im wesentlichen gleiche Innenabmessungen haben, so daß ein vielseitiges Monobohrloch erzeugt wird. In einem solchen Monobohrlochsystem ist es möglich, tertiäre Abzweigungslöcher von den sekundären Abzweigungslöchern weg zu bohren, wobei dieser Vorgang immer wieder wiederholt werden kann, so daß ein tatsächlich wurzelartiges vielseitiges Bohrlochsystem erzeugt wird.It is understood that it is the Use of expandable pipes in a versatile borehole system allows that the Borehole pipes in the main borehole or mother borehole and in the primary and secondary Abzweigungslöchern or borehole branches have essentially the same internal dimensions, so that a versatile monobore is created. In such a monobore system Is it possible, tertiary Abzweigungslöcher from the secondary Abzweigungslöchern drilling away, this process being repeated again and again can so that a indeed root-like versatile borehole system is generated.
Kurze Beschreibung der ZeichnungenShort description of the drawings
Bevorzugte Ausführungsbeispiele des Verfahrens und Systems gemäß der vorliegenden Erfindung werden unter Bezugnahme auf die Zeichnungen beschrieben, in denen zeigen:Preferred embodiments of the method and systems according to the present Invention will be described with reference to the drawings, in which show:
Detaillierte Beschreibung der bevorzugten Ausführungsbeispieledetailed Description of the preferred embodiments
Unter Bezugnahme auf
Die Verwendung von expandierten Futtern
Eine solche Innenweite ist ein Minimalerfordernis
für das
Einsetzen einer Bohranordnung in die primären Abzweigungslöcher
Vorzugsweise ist auch das Hauptbohrloch
Dies gestattet eine weitere Zunahme
der Innenweite der Futter
Die primären und sekundären Abzweigungslöcher
Es versteht sich, daß das dargestellte
Bohrlochsystem eine wurzelartige Bohrlochkonfiguration hat, die
eine optimale Drainage der kohlenwasserstofffluidhältigen Formation
Gemäß
Das primäre Abzweigungsloch
Nach dem Beenden des Bohrens wird
das gewundene Rohr expandiert, derart, daß es das Bohrloch auskleidet
und nachfolgend als Stahlfutter des primären Abzweigungsloches
Danach wird ein 4,5 Zoll (= etwa
12 cm) Schuh
Dann wird ein Richtkeil
Bei dem gezeigten Beispiel ist ein.
konventionelles Stahlfutter
Nach dem Beenden des ersten sekundären Abzweigungsloches
Nach dem Einsetzen einer Stahlauskleidung
Claims (13)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99300717 | 1999-02-01 | ||
EP99300717 | 1999-02-01 | ||
PCT/EP2000/000791 WO2000046484A1 (en) | 1999-02-01 | 2000-02-01 | Method for creating secondary sidetracks in a well system |
Publications (2)
Publication Number | Publication Date |
---|---|
DE60009861D1 DE60009861D1 (en) | 2004-05-19 |
DE60009861T2 true DE60009861T2 (en) | 2004-09-02 |
Family
ID=8241204
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE60009861T Expired - Lifetime DE60009861T2 (en) | 1999-02-01 | 2000-02-01 | METHOD FOR DRILLING SECONDARY BRANCH HOLES IN A HOLE HOLE SYSTEM |
Country Status (21)
Country | Link |
---|---|
EP (1) | EP1149225B1 (en) |
CN (1) | CN1205403C (en) |
AR (1) | AR022692A1 (en) |
AT (1) | ATE264451T1 (en) |
AU (1) | AU764042B2 (en) |
BR (1) | BR0007696B1 (en) |
CA (1) | CA2357719C (en) |
CO (1) | CO5211015A1 (en) |
DE (1) | DE60009861T2 (en) |
DK (1) | DK1149225T3 (en) |
EA (1) | EA002465B1 (en) |
EG (1) | EG22061A (en) |
GC (1) | GC0000090A (en) |
ID (1) | ID29532A (en) |
MY (1) | MY121129A (en) |
NO (1) | NO331427B1 (en) |
NZ (1) | NZ512774A (en) |
OA (1) | OA11826A (en) |
TR (1) | TR200102201T2 (en) |
UA (1) | UA73296C2 (en) |
WO (1) | WO2000046484A1 (en) |
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1999
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- 1999-12-28 GC GCP1999471 patent/GC0000090A/en active
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2000
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- 2000-02-01 AT AT00910636T patent/ATE264451T1/en not_active IP Right Cessation
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- 2000-02-01 DE DE60009861T patent/DE60009861T2/en not_active Expired - Lifetime
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DK1149225T3 (en) | 2004-05-10 |
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CN1339083A (en) | 2002-03-06 |
CO5211015A1 (en) | 2002-10-30 |
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NZ512774A (en) | 2003-07-25 |
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AU3278100A (en) | 2000-08-25 |
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TR200102201T2 (en) | 2001-12-21 |
AU764042B2 (en) | 2003-08-07 |
NO331427B1 (en) | 2011-12-27 |
EP1149225A1 (en) | 2001-10-31 |
BR0007696B1 (en) | 2008-11-18 |
GC0000090A (en) | 2004-06-30 |
ID29532A (en) | 2001-09-06 |
CN1205403C (en) | 2005-06-08 |
EA002465B1 (en) | 2002-04-25 |
MY121129A (en) | 2005-12-30 |
BR0007696A (en) | 2001-11-06 |
NO20013754D0 (en) | 2001-07-31 |
CA2357719C (en) | 2009-06-02 |
UA73296C2 (en) | 2005-07-15 |
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