Mechanism Analysis of the Production Performance of Multi-stage Fractured Horizontal Well in Tight Gas Reservoir

doi:10.11885/j.issn.1674-5086.2020.04.10.01

Abstract

Abstract: In order to accurately predict the production performance of multi-stage fractured horizontal wells in tight gas reservoirs under the nonlinear flow mechanisms and complex fracture distribution characteristics, the dual continuum discrete fracture coupling model is used to describe the flow characteristics of original tight reservoirs and hydraulic fractures, and a comprehensive flow mathematical model is constructed. The unstructured 3D tetrahedron mesh and control volume finite element method are used to establish the fully implicit numerical model, and the modified Peaceman method is used to establish the numerical well model of complex fractured horizontal wells, so as to obtain accurate numerical solutions. The influences of some key parameters such as water saturation, stress sensitive coefficient, opening degree and spatial asymmetric distribution of hydraulic fractures on the production performance of fractured horizontal wells in one block of X tight gas reservoir are analyzed. The results show that the simulation method in this paper can accurately predict the production performance of multi-stage fractured horizontal wells in tight gas reservoir, and provide theoretical support and calculation tools for efficient development of tight gas reservoir.

Key words: tight gas, multi-stage fractured horizontal well, gas-water flow, control volume finite element method, numerical simulation

CLC Number:

TE357

ZHANG Boning, ZHANG Ruihan, WU Tingting, LU Youchang. Mechanism Analysis of the Production Performance of Multi-stage Fractured Horizontal Well in Tight Gas Reservoir[J]. 西南石油大学学报(自然科学版), 2020, 42(5): 107-117.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2020.04.10.01

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