Method for testing filtration loss of rough natural fracture fracturing fluid

A technology of natural fractures and testing methods, which is applied in the directions of measuring devices, earthwork drilling, image data processing, etc., and can solve the problem that the research on the law of fracturing fluid loss in natural fractures is not systematic and in-depth.

Pending Publication Date: 2022-01-25
CHINA PETROLEUM & CHEM CORP +1
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  • Description
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Problems solved by technology

However, the existing theory of fracturing fluid loss in fractured reservoirs is not systematic enough to study the law of fracturing fluid loss in natural fractures.

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  • Method for testing filtration loss of rough natural fracture fracturing fluid
  • Method for testing filtration loss of rough natural fracture fracturing fluid
  • Method for testing filtration loss of rough natural fracture fracturing fluid

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Embodiment Construction

[0036] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0037] A kind of rough natural fracture fracturing fluid fluid loss test method of the present invention, comprises the following steps successively:

[0038] Step S1, artificially drill the outcrop of the target oil field construction site to obtain 7 columnar cores, each columnar core has a length of about 50 mm and a diameter of about 25 mm;

[0039] Step S2, processing the columnar core and obtaining the cross-sectional area of ​​the core, and then artificially creating fractures on the processed columnar ...

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Abstract

The invention discloses a method for testing filtration loss of rough natural fracture fracturing fluid. The method comprises the following steps: manually drilling an outcrop of a construction site of a target oil field to obtain a cylindrical rock core; treating the cylindrical rock core, and then conducting artificial fracture forming on the cylindrical rock core in an artificial fracture cutting mode; scanning cracks of the cylindrical rock core to obtain a crack profile map of the cylindrical rock core; calculating the surface roughness of each crack surface; conducting a displacement experiment on the cylindrical rock core subjected to fracture forming; according to the filtration loss time and the accumulated filtration loss of the filtration loss, making a filtration loss and time square root relational graph; according to the filtration loss and time square root relational graph, obtaining a linear relational expression of the filtration loss and time square root and the slope and intercept of a straight line; and according to the cross sectional area of the rock core, the slope of the straight line and the intercept, obtaining the filtration coefficient, the filtration velocity and the initial filtration amount through calculation. According to the method, the filtration law of the fracturing fluid in the natural crack can be accurately obtained, and a basis is provided for hydraulic fracturing during subsequent site construction.

Description

technical field [0001] The invention relates to the technical field of shale oil and gas exploration and development, in particular to a method for testing rough natural fracture fracturing fluid loss. Background technique [0002] The success of the shale gas revolution in the United States in recent years has led the world to gradually pay attention to the development of unconventional oil and gas, and major resource countries in the world have increased their efforts in shale oil and gas exploration and development. In China, the Sichuan Basin is rich in shale gas resources. The annual shale gas production of the Southwest Oil and Gas Field has exceeded 10 billion cubic meters, and future development is expected. [0003] In the development process of unconventional oil and gas exploration and development technology, reservoir stimulation technology such as hydraulic fracturing has become the key technology for economic development in oil and gas field exploration and dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26E21B49/00G06T17/00G01B11/30
CPCE21B43/26E21B49/00G06T17/00G01B11/30
Inventor 张炜肖佳林易招波高婷刘湘黎琴
Owner CHINA PETROLEUM & CHEM CORP
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