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CN-121994604-A - Interface channeling simulation test device and method considering perforation initial damage

CN121994604ACN 121994604 ACN121994604 ACN 121994604ACN-121994604-A

Abstract

The invention discloses an interface channeling simulation test device and method considering perforation initial damage, belonging to the technical field of oil gas exploitation, the interface channeling simulation test device considering perforation initial damage comprises an inner barrel assembly, an outer barrel assembly, a cement ring body, a container assembly and a perforation gun. Through design and sleeve pipe component and rock component size assorted simulation sleeve pipe and simulation rock to form inner tube subassembly and urceolus subassembly, and then realize the simulation of pit shaft structure, and through setting up cement ring body and perforating gun's setting in the filling interval between inner tube subassembly and urceolus subassembly, can realize the construction of test device under the initial damage environment, based on the test device of construction, can realize the simulation of pit shaft hydraulic pressure through the injection of the intraductal liquid of first injection interval of simulation sleeve, utilize container assembly to pour into fluid to first interface, second interface and second injection interval, with the interface channeling simulation test of accomplishing the initial damage of taking into account the perforation.

Inventors

  • CHEN PENGYU
  • Leng Youheng
  • CHENG MUWEI
  • SHI HAIDONG
  • LIU RONGHE
  • LIU BIN
  • LIU XIAOYAN
  • LI MING

Assignees

  • 中国石油天然气股份有限公司
  • 中国石油国际勘探开发有限公司
  • 中石油阿姆河天然气勘探开发(北京)有限公司
  • 中国石油集团科学技术研究院有限公司

Dates

Publication Date
20260508
Application Date
20241105

Claims (11)

  1. 1. An interface channeling simulation test device considering perforation initial damage, which is characterized by comprising: An inner barrel assembly (100) comprising a simulated casing (103) defining a first injection zone (102) therein and a casing member (101) defining a second injection zone (104) therein; A seal member (105) which is provided at a connection position between the dummy sleeve (103) and the sleeve member (101) and which separates the first injection region (102) and the second injection region (104) in the axial direction; An outer cylinder assembly arranged radially outside the inner cylinder assembly (100), a filling section (203) being defined between the inner cylinder assembly (100) and the outer cylinder assembly (200), the outer cylinder assembly comprising a simulated rock (202) and a rock member (201) connected by a connection structure (204); The cement body (300) is arranged in the filling section (203), a first interface (301) is defined between the inner wall surface of the cement body (300) and the outer wall surface of the inner cylinder assembly (100), and a second interface (302) is defined between the outer wall surface of the cement body (300) and the inner wall surface of the outer cylinder assembly; a first sealing piece (400) and a second sealing piece (401) are respectively assembled at two axial ends of the outer cylinder assembly; A container assembly (500) configured to supply liquid and/or gas to the first injection zone (102), the second injection zone (104), the first interface (301) and the second interface (302); A perforating gun (800) configured to create radially extending tunnels (801) in the casing member (101), cement sheath (300), and rock member (201); And the hoop member (802) is sleeved on the rock member (201).
  2. 2. The interface channeling simulation test device considering perforation initiation damage according to claim 1, wherein the simulation casing (103) and the simulation rock (202) are made of transparent materials.
  3. 3. The interface channeling simulation test device considering perforation initiation damage according to claim 1, wherein the container assembly (500) comprises a first water tank (501) and a first pipeline (502), and the first pipeline (502) is a connecting pipeline of the first water tank (501) and the first injection zone (102).
  4. 4. The interface channeling simulation test device considering perforation initiation damage according to claim 1, wherein the container assembly (500) further comprises a second water tank (505), a gas tank (506) and a second pipeline (507), the second pipeline (507) comprising: A first flow section (507 a) having a first end connected to the gas tank (506) and a second end extending away from the first end, and the second water tank (505) being connected to the first flow section (507 a); At least three second flow sections (507 b), wherein the single second flow section (507 b) is a connecting pipeline of the second end of the first flow section (507 a) and the second injection zone (104), the first interface (301) or the second interface (302) respectively.
  5. 5. The interface channeling simulation test device considering perforation initiation damage according to claim 1, further comprising a first strain gauge (600) disposed between the contact surface of the casing member (101) and the cement sheath body (300) and a second strain gauge (601) disposed between the rock member (201) and the cement sheath body (300).
  6. 6. The interface channeling simulation test device considering perforation initiation damage according to claim 1, further comprising a first flow sensor (700) disposed between the simulation casing (103) and the cement sheath (300) and a second flow sensor (701) disposed between the simulation rock (202) and the cement sheath (300).
  7. 7. The interface channeling simulation test device considering perforation initiation damage according to claim 1, wherein the connection structure (204) is a flange structure.
  8. 8. The interface channeling simulation test device considering perforation initiation damage according to claim 1, wherein the first sealing member (400) and the second sealing member (401) are flange bodies.
  9. 9. The interface channeling simulation test device considering perforation initial damage according to claim 1, wherein the simulation test device further comprises an image capturing assembly (900), and the image capturing assembly (900) comprises an image capturing device (901) arranged in the first injection zone (102) and an image capturing control module (902) configured outside the first injection zone (102) and used for controlling the image capturing device (901) and collecting data.
  10. 10. An interface channeling simulation test method considering perforation initial damage, the method being implemented based on the simulation test device of any one of claims 1-9, the method comprising: injecting a liquid into the first injection zone (102) to simulate wellbore hydraulics; Injecting a cement body into the filling section (203) to form a cement sheath (300); Controlling the action of the perforating gun (800) to form a pore canal (801) extending in the radial direction on the sleeve component (101), the cement sheath body (300) and the rock component (201), and closing the radial outer side of the pore canal (801) through the hoop component (802); injecting liquid into the first interface (301), the second interface (302) and the second injection interval (104), and observing and collecting test data.
  11. 11. The method of claim 10, further comprising injecting gas into the second injection zone (104), the first interface (301), and the second interface (302) for gas tightness testing prior to injecting liquid into the first injection zone (102) to simulate wellbore fluid pressure.

Description

Interface channeling simulation test device and method considering perforation initial damage Technical Field The invention belongs to the technical field of oil and gas exploitation, and particularly relates to an interface channeling simulation test device and method considering perforation initial damage. Background At present, the trend of oil gas exploitation gradually progresses toward deep oil gas reservoirs, 70% of newly increased reserves of crude oil belong to low-permeability reservoirs, the difficulty of oil gas exploitation is greatly increased, the conventional exploitation method cannot meet the commercial production requirement, in order to improve the yield of compact deep oil gas reservoirs, the horizontal well multistage fracturing technology is applied to drilling and exploitation engineering and is used as an efficient reservoir reconstruction measure, and the technology is widely applied to the production of deep oil gas reservoirs. In the multistage fracturing process of the horizontal well, the interface channeling phenomenon is directly related to the fracturing effect and the integrity of shaft sealing, so that it is important to prevent channeling among fracturing sections, in order to keep good sealing performance of cement rings, related researches on the sleeve-cement ring interface and cement ring-stratum interface channeling rule during hydraulic fracturing production increasing operation are needed to be carried out, and then the fracturing fluid design and a cement slurry system is optimized. Disclosure of Invention The invention aims to provide an interface channeling simulation test device and method considering perforation initial damage, so as to solve the defects of the prior research in the background technology. In order to achieve the purpose, the invention provides the following technical scheme that the interface channeling simulation test device considering perforation initial damage comprises: an inner barrel assembly including a simulated sleeve having a first injection zone defined therein and a sleeve member having a second injection zone defined therein; a sealing member which is provided at a connection position of the dummy sleeve and the sleeve member and separates the first injection section and the second injection section in an axial direction; the outer cylinder assembly is arranged on the radial outer side of the inner cylinder assembly, a filling interval is defined between the inner cylinder assembly and the outer cylinder assembly, and the outer cylinder assembly comprises simulated rock and rock components which are connected through a connecting structure; the cement ring body is arranged in the filling interval, a first interface is defined between the inner wall surface of the cement ring body and the outer wall surface of the inner cylinder assembly, and a second interface is defined between the outer wall surface of the cement ring body and the inner wall surface of the outer cylinder assembly; the first sealing piece and the second sealing piece are respectively assembled at two axial ends of the outer cylinder assembly; a container group configured to supply liquid and/or gas to the first injection zone, the second injection zone, the first interface, and the second interface; A perforating gun configured to create radially extending tunnels in the casing member, cement sheath, and rock member; and the hoop member is sleeved on the rock member. Further, the simulated casing and the simulated rock are both made of transparent materials. Further, the container assembly comprises a first water tank and a first pipeline, wherein the first pipeline is a connecting pipeline between the first water tank and a first injection zone. Further, the container assembly further includes a second water tank, a gas tank, and a second line, the second line including: A first flow section connected to the first end of the gas tank and a second end extending away from the first end, the second flow section being connected to the first flow section; At least three second flow sections, wherein the single second flow section is a connecting pipeline of the second end of the first flow section and the second injection section, the first interface or the second interface respectively. Further, the simulation test device further comprises a first strain gauge arranged between the contact surface of the sleeve member and the cement sheath body and a second strain gauge arranged between the rock member and the cement sheath body. Further, the simulation test device further comprises a first flow sensor arranged between the simulation sleeve and the cement sheath body and a second flow sensor arranged between the simulation rock and the cement sheath body. Further, the connecting structure is a flange structure. Further, the first sealing piece and the second sealing piece are flange plate bodies. Further, the simulation test device further comprises a camera shootin