A hole layout optimization method for multi-radial hole assisted fracturing

Abstract

The invention discloses a hole layout optimization method for assisted fracturing with multi-radial holes, which comprises the following steps: determining the fracture shape under different radial hole conditions; simulating the swept area of ​​a single fracture, and performing area fitting with an ellipse; The ellipse is rotated concentrically to obtain the total swept area in the case of multiple main fractures; calculate the total swept area. The present invention uses the swept area of ​​a single fracture in a homogeneous reservoir and superimposes the swept area of ​​multiple fractures, and takes the maximum swept area of ​​multiple fractures as the evaluation standard to optimize the radial hole layout method, providing the best solution for the multi-fracture form. Basis for the Ubukon scheme. The present invention uses an ellipse as a substitute figure for a single fracture sweep area, simplifies the calculation method of the sweep area, different reservoirs and fracture parameters can achieve a good fitting effect by adjusting the values ​​of the major and minor axes of the ellipse, and has flexibility and universality .

Description

technical field [0001] The invention relates to a hole layout optimization method for multi-radial hole assisted fracturing, and belongs to the technical field of radial hole assisted fracturing. Background technique [0002] At present, the "fracture conductivity" index is often used to evaluate the two-wing fractures produced by conventional fracturing. This index is only suitable for evaluating a single fracture in the reservoir, and cannot evaluate the multi-radial hole-assisted fracturing that can produce multiple fractures. For the fractures produced by volume fracturing, the index of "reservoir stimulation volume" is often used to evaluate, but volume fracturing will open a large number of reservoir micro-fractures and generate a large number of secondary fractures, which is still not suitable for micro-fractures and few secondary fractures. Evaluation of multiple primary fractures. [0003] In the radial hole-assisted fracturing technology, multiple main fractures c...

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Problems solved by technology

[0002] At present, the "fracture conductivity" index is often used to evaluate the two-wing fractures produced by conventional fracturing. This index is only suitable for evaluating a single fracture in the reservoir, and cannot evaluate the multi-radial hole-assisted fracturing that can generate multiple fractures.

For the fractures produced by volume fracturing, the index of "reservoir stimulation volume" is often used to evaluate, but volume fracturing will open a large number of reservoir micro-fractures and generate a large number of secondary fractures, which is still not suitable for micro-fractures and few secondary fractures. Evaluation of Multiple Main Fractures

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