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A Calculation Method for Fracture Fracture Zone Volume of Shale Horizontal Well

A calculation method and technology of the crushing zone, which are applied in the fields of fluid production, earth-moving drilling, wellbore/well components, etc., can solve the problems of time-consuming, labor-intensive and expensive, and the volume evaluation of fracturing and crushing zone cannot be widely promoted and applied.

Active Publication Date: 2017-08-08
SOUTHWEST PETROLEUM UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention provides a volume calculation method for shale horizontal well fracturing fracture zone which solves the problem of time-consuming, labor-intensive and costly calculation of the volume of the fractured zone during the fracturing of the existing shale horizontal well and the problem that the volume evaluation of the fractured zone cannot be widely applied. method

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  • A Calculation Method for Fracture Fracture Zone Volume of Shale Horizontal Well
  • A Calculation Method for Fracture Fracture Zone Volume of Shale Horizontal Well
  • A Calculation Method for Fracture Fracture Zone Volume of Shale Horizontal Well

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Embodiment 1

[0101] A method for calculating the volume of a fracturing fracture zone in a shale horizontal well, comprising the following steps:

[0102] The geological parameters of a typical shale gas reservoir and the fracturing operation parameters of horizontal wells are known in the following table:

[0103]Table 1 Instance 1 Actual Parameters

[0104]

[0105]

[0106] First, the fracture propagation theory is used to establish the hydraulic fracture propagation model in the shale fracturing process, and the schematic diagram of the model is shown in Fig. figure 2 As shown, in conjunction with the following formula to calculate the extension of three hydraulic fractures in embodiment 1:

[0107] The crack width equation:

[0108]

[0109] The fluid flow equation in the fracture:

[0110]

[0111] Material balance equation:

[0112]

[0113] Solving conditions:

[0114] W(L,t)=0 at y≥=L(t) (42)

[0115]

[0116]

[0117] In the formula: W(y)—maximum fract...

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Abstract

The invention discloses a method for calculating the volume of a shale horizontal well fracturing fragmentation zone, which comprises the following steps: A. The hydraulic fracture extension model in the shale fracturing process can be established by using the fracture extension theory; B. The rock mechanics theory can be used to establish The stress field change model in the rock fracturing process; C. The pressure field change model in the rock fracturing process can be established by using the theory of seepage mechanics; D. The natural fracture failure criterion model in the rock fracturing process can be established by using the rock failure theory ; E. Combining the above four steps, the volume of the fracturing fracture zone can be calculated and characterized through the calculation process. The beneficial effect is that it solves the problem that the volume calculation process of the fractured area is time-consuming, laborious and costly during the fracturing of the existing shale horizontal well, and the evaluation of the volume of the fractured area cannot be widely popularized and applied.

Description

technical field [0001] The invention relates to the field of shale gas development, in particular to a method for calculating the volume of a fracturing fracture zone of a shale horizontal well. Background technique [0002] At present, horizontal well fracture network fracturing technology is a widely used stimulation measure in the development of shale gas reservoirs around the world. This technology can significantly improve the economy and efficiency of shale gas development. The basic feature of volume fracturing is to use large liquid volume, large displacement, large sand volume, small particle size, and low sand ratio for fracturing construction, with the purpose of using artificial fractures to maximize damage, activation, and communication of reservoirs The natural fractures in the wells form a larger volume of the fracture fracture zone, thereby increasing the effective permeability in the area near the horizontal well. [0003] For the pre-design and post-evalua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/26E21B49/00
Inventor 任岚林然赵金洲黄静
Owner SOUTHWEST PETROLEUM UNIV
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