摘要
以页岩储层为研究对象,针对页岩气的吸附解吸和生产问题,根据Langmuir吸附理论,进行参数敏感性分析,并进行运移机理研究。研究表明,Langmuir压力对气体的解析量影响并不大,Langmuir体积才是影响吸附解吸的重要因素。气体在页岩气中的运移主要有气体在裂缝中的渗流、气体在基质壁面的解吸、基质中分子的扩散3个步骤,并相应给出了每个过程的数学表征。详细分析了有机碳含量、有机质成熟度、矿物组成、天然微裂缝等因素对页岩气开发效果的影响,为后期页岩气的开发提供借鉴意义。
Taking shale reservoir as the study target and taking into account of adsorption and desorption of shale gas as well as production issues,parameter sensitivity is analyzed based on Langmuir adsorption theory and migration mechanism is studied.It is shown from the study that Langmuir pressure has little effect upon gas desorption volume and Langniuir volume is just the crucial factor affecting upon adsorption and desorption.Gas migration in shale gas includes three steps;gas filtration in fracture,desorption of gas on the wall surface of matrix and molecular diffusion in matrix,also,each process is characterized mathematically respectively.The effects of a number of factors on shale gas development are analyzed in detail,including organic carbon content,maturity of organic matter,mineral composition,natural micro-fracture,providing reference for late development of shale gas.
出处
《特种油气藏》
CAS
CSCD
北大核心
2014年第1期84-87,155,共4页
Special Oil & Gas Reservoirs
基金
国家重大专项"大型油气田及煤层气开发科技重大专项"之"特低渗油藏有效开发技术"(2011ZX05013-006)
国家重大专项"薄互层低渗透油藏先导试验区块开发技术政策研究"(2011ZX05051005-002)
关键词
页岩气
吸附解吸
运移过程
数学表征
开发效果
shale gas,adsorption and desorption
migration process
mathematical characterization
development result
