页岩气和根缘气成藏特征及成藏机理对比研究  

Contrast Research on Hydrocarbon Accumulation Characteristics and Mechanism of Shale Gas and Sources-contacting Gas

作　　者：徐波[1] 郑兆慧[1] 唐玄[1] 郭华强[1] 聂海宽[1] 张培先[1] 

机构地区：[1]中国地质大学(北京)海相储层演化与油气富集机理教育部重点实验室,北京100083

出　　处：《石油天然气学报》2009年第1期26-30,共5页Journal of Oil and Gas Technology

基　　金：国家自然科学基金项目(40672087)

摘　　要：页岩气和根缘气是非常规天然气藏的重要类型。对比分析表明,这2类气藏在成藏条件、成藏特征、成藏方式上具有相似性,表现为储层低孔低渗、气藏邻近源岩、气藏面积大、丰度低、不依赖常规圈闭存在等。同时,这2类气藏在储集层岩性、保存条件等方面也存在着明显区别;分析认为,这2类气藏在成藏机理和成藏过程上既有明显的区别,也有着密切的联系。进一步结合具体地区分析,指出页岩气和根缘气藏在分布上具有一定的序列性。Shale gas and source-contacting gas were important types of unconventional natural gas reservoirs.Comparative analysis shows that they have similar features of accumulation conditions,characteristics and styles,such as low porosity and permeability,gas accumulating closely to source rocks,large reservoir area,low gas bearing abundance and gas accumulating independent of conventional trap and so on.Meanwhile,there exist obvious differences between shale gas and source-contacting gas reservoirs on the reservoir lithology and preservation conditions.Further analysis indicates that their accumulation mechanisms and process are visible different,and at the same time,they have close relationship.Furthermore,in combination with some areas,shale gas and source-contacting gas accumulation has a sequence property in gas accumulation.

关 键 词：页岩气 根缘气 成藏特征 成藏机理 吸附作用 

分 类 号：P618.13[天文地球—矿床学]