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Horizontal well segmented temporary blockage fracturing method

A horizontal well and fracturing technology, which is applied in earthwork drilling, wellbore/well components, production fluids, etc. It can solve problems such as complex construction, residual wellbore, formation pollution, etc.

Active Publication Date: 2019-05-17
PEKING UNIV
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AI Technical Summary

Problems solved by technology

However, in this solution, the mixing of particles and gel will leave residues in the wellbore, and will also pollute the formation, making the fracturing fractures useless
[0007] To sum up, the existing horizontal well fracturing methods cannot effectively complete the fracturing technology, and the construction is complicated and the failure rate is high

Method used

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  • Horizontal well segmented temporary blockage fracturing method
  • Horizontal well segmented temporary blockage fracturing method
  • Horizontal well segmented temporary blockage fracturing method

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Embodiment Construction

[0014] ZDY-6 temporary plugging agent

[0015] ZDY-6 temporary plugging agent is a granular temporary plugging agent with a particle size of 2-10mm, which can meet different perforation apertures, and a temporary plugging agent with an appropriate particle size can be selected according to the perforation size of each well. In the fracturing construction project, when the fracturing fracture reaches a sufficient length, the ZDY-6 temporary plugging agent is pumped into the sand mixing vehicle and mixed with the fracturing fluid. : When the length of the temporary plugging agent plugging section reaches 0.2 ~ 1m, its pressure bearing capacity is 20 ~ 100MPa).

[0016] A method for staged temporary plugging and fracturing of a horizontal well, comprising the following steps:

[0017] (1) Drill the horizontal well, perform well logging and complete the relevant casing;

[0018] (2) Perform one-time perforation on the analyzed oil-bearing layer through the logging curve, without...

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Abstract

The invention relates to a horizontal well segmented temporary blockage fracturing method and belongs to the technical field of hydraulic fracturing of oil and gas field development. The method comprises the steps of: carrying out temporary blockage on a perforation of a horizontal well; forming a new crack around the temporary blocked perforation; and repeating the process above. The horizontal well segmented temporary blockage fracturing method achieves a segmented fracturing effect on a well section of a horizontal well and provides a more effective, rapider and more convenient mode for development of the horizontal well. Meanwhile, after a temporary blockage agent is degraded, a crack end port also can be supported so as to improve a fracturing success rate; the temporary blockage agent cannot be left in a shaft, meanwhile, has a very high degradation rate in fracturing fluid, and cannot generate pollution to the stratum, so that the transformation effect is greatly promoted.

Description

technical field [0001] The invention relates to a segmented temporary plugging and fracturing method for a horizontal well, belonging to the technical field of hydraulic fracturing for oil and gas field development. Background technique [0002] With the increasing demand for oil in the world, unconventional oil and gas resources are increasingly becoming new areas for exploration and development. my country's unconventional oil and gas resources are extensive and have great potential for increasing production. Hydraulic fracturing is an important measure for increasing production of oil and gas wells and increasing injection of water injection wells. Among them, the development potential of horizontal wells is much greater than that of vertical wells due to their large communication reservoirs. The resulting horizontal well staged fracturing technology is an important technical means for the development of unconventional oil and gas. The staged fracturing technology of hori...

Claims

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Application Information

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IPC IPC(8): E21B43/26
Inventor 温庆志张东晓牟绍艳
Owner PEKING UNIV
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