Evaluation method of volume fracturing stimulation effect

Abstract

The present invention relates to a volume fracturing reforestation effect evaluation method. The volume fracturing reforestation effect evaluation method includes the following steps that: a plurality of wells in a certain region of a field are measured, so that initial basic parameters can be obtained; the average width of fractures in a fracture network is calculated according to the initial basic parameters of a certain well in the region; a constant C is determined according to a boundary condition that the expansion speed of the fractures at an initial time point is equal to the flowing speed of a liquid in the wall at the initial time point; the average fracture length and the number of equivalent fractures in the volume fracturing complex fracture network is solved iteratively, so that key parameters for describing fracture intensity and flow guiding capability in the reforestation volume of volume fracturing can be obtained; a volume fracturing reforestation effect evaluation parameter is calculated; the volume fracturing reforestation effect evaluation parameters of the other volume fracturing wells in the region can be obtained; and the calculation results of the volume fracturing reforestation effect evaluation parameters of the plurality of wells in the region are put into statistics, and the fracturing reforestation effect of the volume fracturing wells is evaluated. With the method of the invention adopted, the reforestation effect of the volume fracturing can be reflected authentically and reasonably.

Description

Technical field [0001] The invention relates to a volume fracturing reconstruction technology for low-permeability unconventional reservoirs, in particular to a method for evaluating the effect of volume fracturing reconstruction. Background technique [0002] Due to its low porosity and low permeability, low-permeability unconventional reservoirs must adopt large-scale volume fracturing technology to achieve industrial development. Volume fracturing technology refers to the use of segmented multi-cluster perforation technology, which uses high net pressure in fractures and inter-fracture interference to realize the communication between artificial fractures and natural fractures and the generation of transverse fractures, forming long and wide reservoirs. , The complex fracture network with high three-dimensional directions makes the oil and gas in the matrix in any direction "shortest" the seepage distance to the fractures, which greatly improves the overall permeability of the...

AI Technical Summary

Problems solved by technology

[0011] One object of the present invention is to provide a method for evaluating the effect of volume fracturing, which is used to solve the problem that the effect of volume fracturing in unconventional tight reservoirs cannot be evaluated objectively, accurately and reasonably

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