中国页岩气藏压裂的关键科学问题

发布时间：2018-05-05 17:35

本文选题：页岩气 + 缝网压裂　；参考：《中国科学:物理学力学天文学》2017年11期

【摘要】：水力压裂技术的提高是保障页岩气高效环保开发的重要途径.本文概述了中美页岩气藏在工程地质、作业环境和技术需求方面的差异.分析表明,中国页岩气藏埋深普遍偏大、闭合压力高、地貌复杂、建井成本高以及水资源匮乏,与美国存在较大差异.针对这些特殊的压裂条件,提出了我国页岩气藏压裂亟待解决的4个关键前沿科学问题:(1)井工厂模式下页岩缝网非平面、非线性动态扩展机理;(2)复杂缝网扩展过程中支撑剂的空间运移和沉降机理;(3)热-流-固三场非线性耦合作用下的页岩气藏重复造缝机理;(4)无水压裂介质流变调控机制与造缝机理.针对各关键科学问题综述了其研究进展和发展方向,对研发原创性的页岩气压裂技术具有重要的理论指导意义.
[Abstract]:The improvement of hydraulic fracturing technology is an important way to guarantee the development of shale gas. This paper summarizes the differences in engineering geology, operating environment and technical requirements of shale gas reservoirs in China and America. The analysis shows that the buried depth of shale gas reservoirs in China is on the high side, the closing pressure is high, the geomorphology is complex, the well construction cost is high and the water resources are scarce, which is quite different from that in the United States. In view of these special fracturing conditions, four key front-line scientific questions to be solved urgently for fracturing in shale gas reservoirs in China are put forward. Nonlinear dynamic Propagation Mechanism: the Spatial Migration of proppant and settlement Mechanism during complex fracture Network expansion the rheological control of water-free fracturing medium in shale gas reservoir under the nonlinear coupling of thermo-fluid-solid three fields Mechanism and jointing mechanism. This paper summarizes the research progress and development direction of various key scientific problems, which is of great theoretical significance for the research and development of the original shale pressure fracture technology.
【作者单位】：西南石油大学油气藏地质及开发工程国家重点实验室;
【基金】：国家自然科学基金(编号:51490653) 四川省青年科技创新研究团队专项计划(编号:2017TD0013) 国家留学基金资助项目
【分类号】：TE377

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