Numerical Simulation of Water Distribution of Bio-reef Gas Reservoir

doi:10.11885/j.issn.1674-5086.2020.02.26.01

Abstract

Abstract: The distribution of gas and water is usually very complicated in water-bearing bio-reef gas reservoir with strong heterogeneity. The correct understanding of gas and water distribution is the key to forecasting water production and plan adjustment in development of gas reservoir. There are some limitations for the existing methods of logging interpretation and seismic interpretation to stratigraphic water distribution. Numerical simulation, a technique that can fully combine geological static knowledge and production dynamic data, provides an important means for studying formation water distribution. Firstly, to analyze and quantify the active parameters of water intrusion, and study water intrusion mechanism based on three-dimensional model of gas reservoir considering reservoir heterogeneity, analyze the sensitivity of gas well production index to various parameters. Then identify the most possible situation of formation water state based on geological knowledge and production dynamic data. At the same time, describe the formation water distribution in detail by J function. Finally, a fine numerical simulation model that is more consistent with the actual gas reservoir is obtained. The research in this article has deepened the understanding of the formation water distribution of the Changxing complex reef gas reservoir in Yuanba. The research idea is also applicable to other types of water gas reservoirs with different degree of heterogeneity.

Key words: bio-reef, water-bearing gas reservoir, numerical simulation, mechanism research, J function, gas and water transition zone

CLC Number:

TE33

YANG Lijuan, ZHANG Mingdi, WANG Bencheng, WEN Shanzhi, LIU Yuanyang. Numerical Simulation of Water Distribution of Bio-reef Gas Reservoir[J]. 西南石油大学学报(自然科学版), 2020, 42(5): 118-126.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2020.02.26.01

http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2020/V42/I5/118

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