WO2017193504A1 - Tubage de complétion de puits horizontal de pétrole épaissi permettant une extraction de sous-section - Google Patents

Tubage de complétion de puits horizontal de pétrole épaissi permettant une extraction de sous-section Download PDF

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Publication number
WO2017193504A1
WO2017193504A1 PCT/CN2016/097426 CN2016097426W WO2017193504A1 WO 2017193504 A1 WO2017193504 A1 WO 2017193504A1 CN 2016097426 W CN2016097426 W CN 2016097426W WO 2017193504 A1 WO2017193504 A1 WO 2017193504A1
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Prior art keywords
section
horizontal
oil
secondary screen
pipe
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Ceased
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PCT/CN2016/097426
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English (en)
Chinese (zh)
Inventor
贺昶明
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Sichuan Xingzhi Zhihui Intellectual Property Operation Co Ltd
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Sichuan Xingzhi Zhihui Intellectual Property Operation Co Ltd
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Publication of WO2017193504A1 publication Critical patent/WO2017193504A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • E21B43/02—Subsoil filtering
    • E21B43/08—Screens or liners
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • 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
    • E21B37/00—Methods or apparatus for cleaning boreholes or wells
    • 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
    • E21B37/00—Methods or apparatus for cleaning boreholes or wells
    • E21B37/08—Methods or apparatus for cleaning boreholes or wells cleaning in situ of down-hole filters, screens, e.g. casing perforations, or gravel packs
    • 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
    • E21B43/08—Screens or liners
    • E21B43/086—Screens with preformed openings, e.g. slotted liners
    • 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

Definitions

  • the invention belongs to the technical field of horizontal well production, and particularly relates to a heavy oil horizontal well completion string which can be segmentally mined.
  • Heavy oil is an important part of petroleum hydrocarbon energy, and its characteristics are as follows:
  • paraffin content in heavy oil is generally low, but there are also very few oil fields that are “double high oil fields”, that is, high asphaltene content and high paraffin content, characterized by high viscosity and high freezing point crude oil.
  • horizontal wells are beneficial to increase single well production, increase recoverable reserves and improve oil recovery.
  • horizontal well development technology is applied to various types of reservoirs.
  • traditional openhole completions, primary screen completions, and perforation completions can cause problems for horizontal well development. Due to the long production level, affected by the frictional resistance of the wellbore, the production pressure difference of the whole horizontal section is different, the pressure difference between the heel and the end is the largest, and the pressure difference between the toe ends is the smallest, which eventually leads to uneven production of the horizontal section and even appears. The situation that the toe end does not produce liquid greatly affects the development effect of the horizontal well.
  • the invention provides a heavy oil horizontal well completion pipe string which can be segmentally mined, reduces the production pressure difference of the heel end, enlarges the production pressure difference of the toe end, and realizes the relatively uniform output of the horizontal section, thereby realizing the horizontal well section mining.
  • a heavy oil horizontal well completion string that can be mined in sections, including an L-shaped production casing, the horizontal section of the production casing is connected with two primary screens, and the casing is disposed between the two primary screens,
  • An L-shaped oil suction pipe is fixed in the vertical section of the production casing by a packer, and an inner pipe packer is installed in the casing, and the horizontal end of the oil suction pipe is composed of two of the primary sieve pipes and the casing
  • the horizontal well section is freely extended, and the horizontal section of the oil sucking pipe is provided with a secondary screen, the secondary screen is connected to the primary screen of the horizontal section of the production casing, and two are installed outside the casing.
  • An out-of-tube packer, and two of the out-of-tube packers divide the open-eye into three parts;
  • the screen of the second-stage screen includes a narrowed section that is sequentially connected radially outward along the secondary screen, and straight The segment and the impact segment, the inner diameter of the reduced section decreases radially outward along the secondary screen, and the inner diameter of the impact section decreases radially outward along the secondary screen.
  • the present invention divides the naked eye into three parts in the horizontal well through two outer packers, that is, the oil in the horizontal well respectively
  • the two primary screens enter the pumping pipe; at this time, the oil entering from the two primary screens is transported to the upper part of the vertical section of the production casing through the end of the pumping pipe and the secondary screen on the horizontal section of the pumping pipe. In the middle, the section mining of the horizontal well is completed.
  • the invention utilizes sectional mining to reduce the frictional resistance of the liquid produced at the toe end of the horizontal well, enlarge the production pressure difference of the toe end, increase the frictional resistance of the horizontal well and the production fluid, and reduce the production pressure of the heel end.
  • Poor the horizontal production of the liquid is relatively evenly produced, effectively solving the uneven production of the horizontal section caused by the conventional horizontal well completion method, and even the toe end
  • the problem of non-liquid production is to achieve balanced production of horizontal sections and improve the development of horizontal wells.
  • the oil in the open hole near the end of the production casing passes through the primary screen and the secondary screen to filter, so that the solid phase content of the oil finally entering the pumping pipe is minimized, and the horizontal completion is washed in the later stage of oil recovery.
  • the washing fluid is injected into the production casing, and the oil suction pipe, the primary sieve pipe and the secondary sieve pipe are cleaned by the washing fluid to ensure the oil recovery efficiency of the horizontal completion in the later mining process;
  • the washing fluid when the washing fluid enters the oil sucking pipe from the production casing, the resistance of the washing fluid in the oil sucking pipe is relatively large due to the large pressure of the oil layer, and the washing is performed for the two primary screens.
  • the well fluid is injected into the primary screen near the side of the production casing by the secondary screen on the horizontal section of the pumping pipe. At this time, the washing fluid is sprayed out of the primary screen directly opposite the secondary screen to realize the dredging.
  • the effect of the mesh hole on the primary screen is difficult to achieve. Therefore, the inventors have improved the screen hole of the secondary screen, that is, the screen hole of the secondary screen includes a narrow section, a straight section and an impact section which are sequentially connected.
  • the inner diameter of the narrowing section and the impact section are all decreased along the radial direction of the secondary screen, while the inner diameter of the straight section remains unchanged.
  • the well fluid begins to flush the primary screen while maintaining its high speed state, while the solid phase particles that are blocked on the secondary screen and the primary screen are washed away by the washing fluid with strong impact force, so that the secondary screen and The primary screen maintains the smoothness of its mesh openings.
  • the lengths of the reduced section, the straight section, and the impact section in the radial direction of the secondary screen are sequentially increased.
  • the length of the narrowing section, the straight section and the impact section in the radial direction of the secondary screen is directly related to the jetting speed of the washing fluid on the secondary screen, that is, the speed of the washing fluid in the sieve hole is accelerated, and the primary sieve is
  • the impact force of the tube is larger, and the length of the narrow section, the straight section and the impact section in the present invention increases along the radial direction of the secondary screen, so that the acceleration time of the washing fluid in the sieve hole
  • the extension ensures that the impulse of the well washing liquid can completely remove the solid phase particles on the primary screen and the secondary screen to ensure stable output of the produced liquid in the later stage of horizontal completion.
  • a lost hand that is connected to the upper end of the packer by a thread. After the hand is connected to the packer, it can be directly connected with the pumping string in the technical casing. At the same time, the packer separates the vertical part of the first section of the oil pipe into upper and lower parts, and the oil hole is opened in the lower part. The hand is located at the upper part, so that the product fluid flowing in the first stage of the primary screen is directly mixed with the liquid phase flowing in from the second section of the oil pipe after flowing into the oil hole, and is concentrated in the hand and is taken out of the well. outer.
  • the present invention has the following advantages and beneficial effects:
  • the oil in the open hole near the end of the production sleeve of the invention is filtered through the primary screen and the secondary screen, so that the solid phase content of the oil finally entering the pumping pipe is minimized, and the horizontal completion is performed in the late stage of oil recovery.
  • the washing fluid is injected into the production casing, and the oil suction pipe, the primary sieve pipe and the secondary sieve pipe are cleaned by the washing fluid to ensure the oil recovery efficiency of the horizontal completion in the later mining process.
  • Figure 1 is a schematic structural view of the present invention
  • Figure 2 is a schematic view showing the structure of the secondary screen.
  • 1-production casing 2-casing, 3-tube outer packer, 4-primary screen, 5-handle, 6-packer, 7-oil pipe, 8-in-tube packer, 9- Open-hole, 10-technical casing, 11-secondary screen, 111-impact section, 112-straight section, 113-reduced section, A-heel end, B-toe end.
  • the present embodiment comprises an L-shaped production casing 2, the horizontal section of which is connected to two primary screens, and the casing 2 is arranged between the two primary screens.
  • An L-shaped oil suction pipe 7 is fixed in the vertical section of the production casing 2 by a packer 6, and an inner pipe packer 8 is installed in the casing 2, and the horizontal end of the oil suction pipe 7 is two
  • the horizontal screen formed by the primary screen and the casing 2 is freely extended, and the horizontal section of the oil suction pipe 7 is provided with a secondary screen 11 which is opposite to the horizontal section of the production casing 2 Connected primary screen, two outboard packers 3 are mounted outside the casing 2, and the two outboard packers 3 divide the open eye 9 into three parts; the screen of the secondary screen 11
  • the hole includes a narrowing section 113, a straight section 112 and an impact section 111 which are sequentially connected radially outward along the secondary screen 11, and the inner diameter of the reducing section 113 decreases radially outward along the secondary screen 11, the impact
  • the present invention divides the naked eye 9 into three parts in the horizontal well through the two outer tube packers 3, namely The oil in the horizontal well enters the pumping pipe 7 through two primary screens respectively; at this time, the oil entering from the two primary screens passes through the end of the oil suction pipe 7 and the secondary screen 11 on the horizontal section of the oil suction pipe 7, respectively.
  • the invention utilizes the sectional mining to reduce the frictional resistance of the liquid produced at the toe end of the horizontal well, enlarges the production pressure difference of the toe end B, and increases the frictional resistance of the horizontal well A and the liquid A, and reduces the friction.
  • Production pressure difference with the end A real Now the production of liquid in the horizontal section is relatively evenly produced, which effectively solves the problem of uneven production of liquid in the horizontal section caused by the completion of the conventional horizontal well completion method, and even the problem of non-liquid production at the toe end B, achieving balanced production of liquid in the horizontal section and increasing water.
  • the oil in the open hole 9 near the end of the production casing 2 is filtered through the primary screen and the secondary screen 11, so that the solid phase content of the oil finally entering the suction pipe 7 is minimized, and at the later stage of the oil recovery.
  • the washing fluid is injected into the production casing 2, and the oil sucking pipe 7, the primary screen and the secondary screen 11 are cleaned by the washing fluid to ensure the horizontal completion in the later mining process. Oil recovery efficiency;
  • the two primary screens are correspondingly Said that the washing fluid is injected into the primary screen near the side of the production casing 2 by the secondary screen on the horizontal section of the oil suction pipe 7, at which time the washing fluid is directed to the primary screen directly opposite the secondary screen.
  • the effect of ejecting to achieve the unblocking of the mesh holes in the primary screen is difficult to achieve. Therefore, the inventors have improved the screen openings of the secondary screen 11, that is, the screen holes of the secondary screen 11 include the narrowing sections 113 which are sequentially connected.
  • the flow rate of the washing fluid will increase continuously after passing through the flow cross section, and the acceleration in the impact section 111 is again accelerated by the gentle transition in the straight section 112, and
  • the pressure in the horizontal well is equivalent to the pressure in the secondary screen 11 compared to the ordinary sieve.
  • the washing fluid finally overflowing from the impact section 111 starts to wash the primary screen while maintaining its high speed state, and the solid phase particles blocked on the secondary screen 11 and the primary screen are strongly impacted.
  • the well washing liquid is washed away, so that the secondary screen 11 and the primary screen maintain the smoothness of the mesh.
  • the straight section 112 and the impact section 111 are in two
  • the length of the stage screen 11 in the radial direction is sequentially increased.
  • the length of the narrowing section 113, the straight section 112 and the impact section 111 in the radial direction of the secondary screen 11 is directly related to the jetting speed of the washing fluid on the secondary screen 11, that is, the speed of the washing fluid in the screen is accelerated. More, the impact on the primary screen is greater, and in the present invention, the length of the narrow section 113, the straight section 112 and the impact section 111 increases along the radial direction of the secondary screen 11, so that the washing fluid is sieved.
  • the acceleration time in the hole is prolonged, and the impulse at the time of the injection of the washing liquid can completely remove the solid phase particles on the primary screen and the secondary screen 11, thereby ensuring the stable output of the production liquid in the later stage of horizontal completion.
  • This embodiment further includes a lost hand 5, which is connected to the upper end of the packer 6 by a thread.
  • the lost hand 5 After the lost hand 5 is connected with the packer 6, it can directly interface with the sucker 7 column in the technical casing 10, and the packer 6 blocks the vertical portion of the first section of the oil pipe into upper and lower parts.
  • the oil hole is opened at the lower part, and the hand 5 is located at the upper portion, so that the product liquid flowing in the first stage primary sieve tube is directly mixed with the liquid phase flowing in from the second stage oil pipe after being flowed into the oil hole, and concentrated in After losing the hand 5, he was taken out of the well.

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Removal Of Floating Material (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Abstract

La présente invention concerne un tubage de complétion de puits horizontal de pétrole épaissi permettant une extraction de sous-section. Le tubage de complétion de puits horizontal comprend un manchon de production (1). Deux tubes filtres primaires (4) sont raccordés à une section horizontale du manchon de production (1). Un tuyau d'extraction de pétrole (7) est fixé dans une section verticale du manchon de production (1) par l'intermédiaire d'une garniture d'étanchéité (6). L'extrémité horizontale du tuyau d'extraction de pétrole (7) s'étend librement dans la section de puits horizontale formée par les deux tubes filtres primaires (4) et un manchon (2). Une section horizontale du tuyau d'extraction de pétrole (7) est pourvue d'un tube filter (11) secondaire . Un trou de filtre du tube filtre (11) secondaire comprend une section de retrait (113), une section droite (112) et une section d'impact (111). Le diamètre interne de la section de retrait (113) diminue progressivement vers l'extérieur dans la direction radiale du tube filtre secondaire. Le diamètre interne de la section d'impact (111) diminue progressivement vers l'extérieur dans la direction radiale du tube filtre (11) secondaire . Dans le puits horizontal, deux garnitures de tube externe (3) permettent de diviser un puits ouvert (9) en trois parties. C'est-à-dire que le pétrole liquide dans le puits horizontal pénètre dans la périphérie du tuyau d'extraction de pétrole (7) à travers les deux tubes filtres (11) primaires. À ce moment, le pétrole liquide entrant depuis les deux tubes filtres (11) primaires est transporté dans la partie supérieure de la section verticale du manchon de production (1) par l'intermédiaire de l'extrémité du tuyau d'extraction de pétrole (7) et le tube filtre (11) secondaire sur la section horizontale du tuyau d'extraction de pétrole (7), respectivement, et ensuite, l'extraction de sous-section d'un puits horizontal est réalisée. Le tubage de complétion de puits horizontal de pétrole épaissi permettant une extraction de sous-section peut réduire au minimum la teneur en matières solides du pétrole liquide pénétrant dans le tuyau d'extraction de pétrole, et peut assurer l'efficacité de récupération de pétrole du puits horizontal à un stade ultérieur dans le processus d'extraction.
PCT/CN2016/097426 2016-05-11 2016-09-28 Tubage de complétion de puits horizontal de pétrole épaissi permettant une extraction de sous-section Ceased WO2017193504A1 (fr)

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CN201610309003.2 2016-05-11
CN201610309003.2A CN105952388A (zh) 2016-05-11 2016-05-11 可分段开采的稠油水平井完井管柱

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105952388A (zh) * 2016-05-11 2016-09-21 四川行之智汇知识产权运营有限公司 可分段开采的稠油水平井完井管柱
CN105863579A (zh) * 2016-05-11 2016-08-17 四川行之智汇知识产权运营有限公司 一种稠油水平井热采用的生产管柱
CN106837262A (zh) * 2017-04-14 2017-06-13 张兴 水平井完井管柱及水平井

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CN105927164A (zh) * 2016-05-11 2016-09-07 四川行之智汇知识产权运营有限公司 一种浅层稠油油藏完井管柱
CN105952388A (zh) * 2016-05-11 2016-09-21 四川行之智汇知识产权运营有限公司 可分段开采的稠油水平井完井管柱

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CN2632314Y (zh) * 2003-07-01 2004-08-11 中国石油天然气股份有限公司 新型梯形割缝筛管
US8267169B2 (en) * 2008-03-13 2012-09-18 Schlumberger Technology Corporation Methods and apparatus for attaching accessories to sand screen assemblies
CN101864921A (zh) * 2010-06-11 2010-10-20 大港油田集团有限责任公司 水平井的完井、采油管柱及其完井、采油工艺
CN203559882U (zh) * 2013-10-15 2014-04-23 西安科技大学 一种石油筛管
CN204163702U (zh) * 2014-10-23 2015-02-18 天津中杰科技发展有限公司 台阶缝割缝筛管
CN204283367U (zh) * 2014-12-08 2015-04-22 众通（北京）能源技术有限公司 水平井智能控水完井管柱
CN105863590A (zh) * 2016-05-11 2016-08-17 四川行之智汇知识产权运营有限公司 用于浅层稠油油藏的防砂管柱
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CN105863578A (zh) * 2016-05-11 2016-08-17 四川行之智汇知识产权运营有限公司 一种可实现分段开采的水平井完井管柱
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CN105952388A (zh) * 2016-05-11 2016-09-21 四川行之智汇知识产权运营有限公司 可分段开采的稠油水平井完井管柱

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