
Review of research methods on water production mechanisms in tight sandstone gas reservoirs
ZiHao HAN, ZhanSong ZHANG, JianHong GUO, Hao ZHANG, Jian SONG
Prog Geophy ›› 2025, Vol. 40 ›› Issue (2) : 619-633.
Review of research methods on water production mechanisms in tight sandstone gas reservoirs
Tight sandstone gas reservoirs, as a crucial component of global unconventional natural gas resources, face challenges in efficient development due to the unclear water production mechanisms. This paper systematically reviews the research methods for studying water production mechanisms in tight sandstone gas reservoirs through a literature survey, providing more comprehensive theoretical and methodological support to address this issue. The research methods are primarily categorized into three types: theoretical and model analysis, experimental analysis, and produced water characteristic analysis. Theoretical analysis integrates theories related to gas and water occurrence, revealing the distribution, flow, and interactions of gas and water in reservoirs at both macro and micro levels. Experimental analysis verifies the flow characteristics of gas and water and the water production mechanisms through methods such as Nuclear Magnetic Resonance (NMR) experiments, capillary pressure experiments, and gas drive water experiments. The produced water characteristic analysis method uses field production data and water sample chemical compositions to determine the type of water production and, combined with the first two methods, specifically analyzes the gas-water occurrence state and water production mechanisms. The results indicate that analyzing water production mechanisms in tight sandstone gas reservoirs requires a comprehensive application of multiple methods to enhance predictive accuracy. The paper concludes with a discussion and outlook on the development trends and existing achievements in reservoir water production mechanism research methods, proposing improvements in predictive accuracy through cross-validation, refining experimental processes, and employing chemical or isotope analysis techniques combined with big data and artificial intelligence algorithms to further enhance the accuracy and applicability of water production mechanism research.
Tight sandstone gas reservoir / Water production mechanism / Produced water characteristics / Review
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感谢审稿专家提出的修改意见和编辑部的大力支持!
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