大庆石油地质与开发2025，Vol.44Issue(4)：109-116,8.DOI:10.19597/J.ISSN.1000-3754.202405017
考虑原生水的页岩基质孔内气体传质机理
Gas mass transfer mechanism in shale matrix pores considering connate water
摘要
Abstract
Shale reservoirs are characterized by micro-nano pores development and connate water occurrence.The existing mass transfer models are mainly established for single-phase gas and cannot effectively describe mass trans-fer laws of shale gas in matrix pores.Mass transfer mechanism of shale gas with influence of connate water is re-vealed by analyzing occurrence characteristics of connate water,free gas and adsorbed gas in shale matrix pores,and mathematical model of shale gas mass transfer considering 12 influencing factors including connate water is es-tablished by apparent permeability method.The results show that connate water significantly reduces mass transfer capacity of shale matrix,and the degree of influence is positively correlated with pressure and pore size.When con-nate water saturation of reservoir is 60%,with influence of connate water ignored,matrix permeability is overesti-mated by at least 87%with high pressure(>120 MPa)and large pores(pore diameter>25 nm),and over 70%with low pressure(1～10 MPa)and small pores(pore diameter<5 nm).The research describes the influence process of connate water on mass transfer capacity of shale gas in matrix pores,guiding the whole life cycle development of gas wells.关键词
页岩气/原生水/表观渗透率/基质孔/吸附/传质Key words
shale gas/connate water/apparent permeability/matrix pore/adsorption/mass transfer分类
能源科技引用本文复制引用
游恺涛,戚志林,梁洪彬,黄小亮,莫非,袁迎中..考虑原生水的页岩基质孔内气体传质机理[J].大庆石油地质与开发,2025,44(4):109-116,8.基金项目
国家自然科学基金青年科学基金项目"深层页岩多场耦合吸附解吸机制及数学模型研究"(52304024) （52304024）
国家自然科学基金面上项目"高温高压水溶性气藏气水运移机理研究"(52274034) （52274034）
重庆市自然科学基金面上项目"深层页岩气藏压裂水平井流固耦合气水两相流动机理研究"(CSTB2023NSCQ-MSX0264) （CSTB2023NSCQ-MSX0264）
重庆科技大学科研项目"页岩储层气水两相相渗规律及表征方法研究"(20240323) （20240323）
重庆科技大学研究生科技创新项目"深层页岩气流固耦合跨尺度流动机理研究"(YKJCX2320121). （YKJCX2320121）
