摘要
页岩气是指以吸附或游离状态聚集在暗色泥页岩或高碳泥页岩中的一种非常规天然气,储集空间为有机质孔隙及矿物基质孔隙和裂缝,其来源有生物成因和热解成因2种,具有典型的自生自储特征。页岩气孔隙度(<10%)和渗透率(μD～nD)较低,需通过压裂(一般为水力压裂)来增强连通性,进而获得经济开发。页岩气在美国的成功开发展示了页岩气是基础地质和石油工程高度结合的典范。页岩气勘探程度低,技术不成熟,页岩气藏主控因素不清楚,成藏理论或模式有待深入研究,是当前我国页岩气发展面临的主要问题。
Shale gas is one of unconventional gas resources and stores in organic rich shales and mudstones as free gas and absorbed gas in pores developed in organic matter and mineral matrix. Shale gas accumulation is considered as a cumulative gas charging within organic rich shales, and the organic rich shales serve as gas source, reservoir and seals. The gas origin in shale gas reservoirs could be thermogenic, biogenic or the mixing of both. The feature of low porosity （〈 10%） and low permeability （~D^nD） in shales requires hydraulic fracturing to enhance pore connectivity for achieving commercial gas production. A success of shale gas development in the United States is a typical model of comprehensive integrating between shale gas geological characterization and petroleum engineering technologies. Shale gas exploration in China is in its early stage but shows a great resource potential. The low level shale gas survey, immature technologies for shale gas development, unclear understanding of main controlling factors of shale gas reservoirs, the lack of the theory and model of shale gas accumulation are challenging issues for shale gas success in China.
出处
《岩性油气藏》
CSCD
2013年第2期116-122,共7页
Lithologic Reservoirs
基金
国家重点基础研究发展计划(973)项目"页岩气形成与含气性的影响因素研究"(编号:2012CB214701)
国家自然科学基金项目"页岩气藏天然气赋存方式
储存空间和保存条件的地球化学研究"(编号:41072092)
兰州大学中央高校基本科研业务费专项资金(编号:lzujbky-2010-180)联合资助
关键词
页岩气
成藏条件
资源量
水力压裂
shale gas
accumulation conditions
resources
hydraulic fracturing
作者简介
作者简介：张小龙（1988-），男，兰州大学在读博士研究生，研究方向为油气有机地球化学。地址：（7300000）甘肃省兰州市城关区天水南路222号兰州大学齐云楼1913室。E—mail：zhangx1112@lzu．edu．cn
通信作者：张同伟（1965-），男，教授，博士生导师，主要从事石油、天然气地质地球化学及成藏地球化学方面的研究。E-mail：zhangtw@lzu．edu．cn
