Indoor simulation experiment device and method for temporary blocking of near wellbore formation

A simulation experiment device and near-wellbore technology, applied in the field of petroleum fracturing, can solve the problems of inability to simulate particle type and fiber type diverting agent plugging, lagging technology evaluation technology for fracture diverting agent plugging ability, and inability to simulate fracture conditions, etc. Achieve the effect of improving construction effect, improving credibility and improving plugging quality

Pending Publication Date: 2018-05-01
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there is no relevant method to determine the process parameters of this technology, mainly relying on field experience, and the evaluation technology of fracture diverting agent plugging ability is relatively lagging behind, and single-tube or parallel-connected double-tube cores or sand filling model flow simulation experimental devices are used to qualitatively evaluate the sealing capacity of diverting agents. plugging ability, but there are problems such as failure to simulate fracture conditions, and failure to simulate plugging of particle type and fiber type diverting agents due to injection problems

Method used

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  • Indoor simulation experiment device and method for temporary blocking of near wellbore formation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 As shown, the near-wellbore temporary plugging indoor simulation experiment device includes an experiment end and an information collection end 1. The experiment end includes an injection body and an experiment body. The injection body is connected to the experiment body through pipelines. The experiment body includes a vertical wellbore 2 and at least one Branch 3, at least one branch interface 4 is provided on the lower side wall of the vertical wellbore 2, one end of the branch 3 is detachably connected with the vertical wellbore 2 through the branch interface 4, and the side wall of the branch 3 is provided with simulated blast holes 5 and simulated cracks 6, The information collection terminal 1 is connected with the sensor set in the experiment body.

[0029] When simulation experiments are required, the pre-prepared temporary plugging agent is put into the injection main body, the temporary plugging agent enters the vertical wellbore 2 through th...

Embodiment 2

[0033] Such as figure 1 As shown, the experimental body also includes at least one dead plug 7, which is detachably connected to the vertical wellbore 2 through the branch interface 4, and the number of dead plug 7 and branch 3 is equal to the number of branch interfaces 4.

[0034] The simulated blast hole 5 is evenly distributed along the extension of the other end of the branch 3, and is a cylindrical hole with a diameter of 1-2cm and a length of 5-10cm. The simulated crack 6 is distributed along the side wall of the branch 3, and is aligned with the axial direction of the branch 3. Parallel, the cracks are wedge-shaped, with a width of 0.2-2cm and a length of 20-50cm.

[0035] The axis of the branch 3 is perpendicular to the axis of the vertical wellbore 2, the angle between adjacent branches 3 is 0°-360°, and the diameter of the vertical wellbore 2 is 38.1mm.

[0036] There are multiple sensors, which are respectively located at the upper part of the inner side of the ve...

Embodiment 3

[0041] Such as figure 1 As shown, the injection body includes a piston container 8, a displacement pump 9 and a safety valve 10, one end of the piston container 8 is connected to the displacement pump 9, the other end of the piston container 8 is connected to the safety valve 10, and the other end of the safety valve 10 One end communicates with the temporary plugging agent inlet of the vertical wellbore 2.

[0042] A stirring device is arranged in the piston container 8 .

[0043] The vertical shaft 2 is provided with a pressure display device 11 .

[0044] After the temporary plugging agent is placed in the piston container 8, when an experiment is required, the displacement pump 9 is turned on, and the displacement pump 9 can send the temporary blocking agent into the vertical wellbore 2, and the safety valve 10 can be used to control the flow of the temporary blocking agent. flow, the working pressure of the system is 0-50MPa, the displacement range of the displacement p...

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Abstract

The invention relates to an indoor simulation experiment device for temporary blocking of a near wellbore formation. The indoor simulation experiment device comprises an experiment end and an information acquisition end, wherein the experiment end comprises an injection main body and an experiment main body; the experiment main body comprises a vertical shaft and at least one branch; at least onebranch connector is arranged on a side wall at the lower part of the vertical shaft; a simulation blast hole and a simulation crack are arranged on the side wall of a branch; the information acquisition end is connected with a sensor arranged in the experiment main body. An indoor simulation experiment method for the temporary blocking of the near wellbore formation is applied to the indoor simulation experiment device for the temporary blocking of the near wellbore formation. The indoor simulation experiment device and method for the temporary blocking of the near wellbore formation can be used for really simulating different blast holes and corresponding crack conditions so that a near wellbore temporary blocking process is simulated, an on-site construction design is effectively guidedand the construction effect is improved. The information acquisition end is used for acquiring data and the result credibility is high; on-site experience is not needed, and the actual plugging effectand plugging quality are improved.

Description

technical field [0001] The invention relates to the field of petroleum fracturing, in particular to an indoor simulation experiment device and method for temporary plugging near a well zone. Background technique [0002] At present, Schlumberger broadband fracturing, Sichuan split flow temporary plugging fracturing, and Changqing oilfield dynamic multi-stage temporary plugging fracturing technologies are novel, and their principles are similar to flow-limited fracturing and blast hole plugging technologies. General combined pressure, during the stimulation process, the temporary plugging material is used to realize the natural selective plugging of the near-wellbore zone, and improve the effectiveness of vertical reservoir interlayer stimulation. This technology can not only try to solve the problem of dense and thin interlayer fracturing, but also has reference significance for vertical well refracturing, horizontal well refracturing, and horizontal well segmented multi-clu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00E21B33/13
CPCG01N33/00E21B33/13
Inventor 许洪星王祖文张冕兰建平曹欣温亚魁高红平陈飞纪冬冬
Owner BC P INC CHINA NAT PETROLEUM CORP
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