Horizontal well multi-section multi-cluster limit flow-limiting fracturing process design method

Abstract

The invention relates to the technical field of horizontal well fracturing, in particular to a horizontal well multi-section multi-cluster limit flow-limiting fracturing process design method which comprises the following steps: (1) data collection; (2) carrying out the segment cluster spacing design; (3) designing a single-segment cluster number; (4) designing the number of single-section holes;(5) designing a phase angle; (6) designing construction displacement and scale; and (7) designing a sand adding mode. The fracturing technology can solve the problems that in an existing fracturing technology, the number of effective fractures is small, the air leakage area is small, even transformation cannot be achieved, the propping agent laying effect is poor, and the single well constructioncost is relatively high. The fracturing technology of subdivision segment dense clustering, limit flow limiting and high-strength sand adding is adopted, and on the basis that the average constructioncost is not increased, the fracturing technology is simple and convenient to implement. The air leakage area is effectively increased, the productivity is improved, the perforation cluster efficiencyin a multi-cluster section is improved, and uniform transformation of multi-cluster cracks is realized; Through optimization of a sand adding mode and optimization of a well entering material, the paving effect of the propping agent is greatly improved, and the effective crack quality and the transformation strength are improved.

Description

technical field [0001] The invention relates to the technical field of horizontal well fracturing, in particular to a multi-stage multi-cluster limit flow limiting fracturing process design method for a horizontal well. Background technique [0002] Staged fracturing of horizontal wells is the main process technology for realizing the commercial development of shale gas. This technology divides the horizontal well into different sections through isolation tools, and performs multi-cluster simultaneous fracturing in each section, so that the shale gas Reservoirs are stimulated to achieve high-efficiency development of shale gas. At present, domestic staged fracturing technology for horizontal wells for shale gas is mainly pumped bridge plug perforation combined staged fracturing technology, and its process parameters are mainly: single-stage length 70-80m, cluster distance 25-35m, The single-stage perforation mainly consists of 3 clusters of equal length perforation, adopts ...

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Problems solved by technology

[0004] The present invention intends to provide a multi-stage multi-cluster limit flow limiting fracturing process design method for horizontal wells to solve the problem of low number of effective fractures, small deflated area, inability to achieve uniform reconstruction and proppant laying in the existing fracturing process. The problem of poor performance

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