Research on Transient Flow Model of Gas Reservoir Based on Boundary Element Theory

doi:10.11885/j.issn.1674-5086.2020.12.16.02

Abstract

Abstract: The reserves of gas reservoir in Permian Qixia Formation, Shuangyushi Area of northwestern Sichuan Basin is abundant, and the research on transient flow model is difficult due to the development fractures and complex boundary caused by multi-period tectonic movement. On the basis of fundamental principle of seepage theory, a composite dual-porosity physical and mathematical model for vertical well is established by considering arbitrary shape boundary, and then the fundamental and pressure response solution of vertical well in such composite model is derived by point source function and BEM. Combining the principle of superposition and computer programming techniques, the dimensionless pseudo-pressure and its derivative are obtained under different variables, and the gas flow regimes are divided and the parameters sensitives are analyzed. In the end, a field case of Well Shuangyu001—1 in Qixia Formation, Shuangyushi Area in northwestern Sichuan Basin is applied by the method proposed in this paper, and obtained an excellent agreement. It provides a new method for well test interpretation of this kind of complex gas reservoir.

Key words: BEM, arbitrary boundary, composite gas reservoir, transient fluid flow

CLC Number:

TE353

DENG Bo, LU Zhengyuan, ZHAO Na. Research on Transient Flow Model of Gas Reservoir Based on Boundary Element Theory[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2023, 45(2): 58-66.

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