摘要
盆地中心气为一类储量巨大的非常规天然气资源。这类天然气除北美已成功地进行了勘探与开发外，世界其他地区还没有得到充分的认识。为此，对盆地中心气系统的概念、该系统的形成演化、成藏机理与成藏模式进行了阐述；在此基础上，对准噶尔盆地腹部盆地中心天然气系统进行了分析，认为该区深层4100-4500m以下存在一异常压力封闭层，相应的煤系烃源岩成熟度Ro〉0．7％、储层致密，泥浆中气显示丰富，推测该区存在一个巨大的盆地中心天然气系统。
Basin-centered gas accumulation(BCGA) is potentially a huge unconventional gas resource. Except its successful exploration and production in North America, BCGA is not fully understood in the rest of the world. The concept, evolution, reservoir forming mechanism and mode of the basin-centered gas system are described. On the basis stated above, the basin centered gas system in the hinterland of Junggar Basin is analyzed. It is considered that below 4100~4500m, there exists a abnormal high pressure confining bed, maturity R_o of corresponding coal bed source rock is >0.7%, reservoir is tightened with rich gas show in mud. It is suggested that there exists a huge basin-centered gas system in the area.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2006年第4期6-11,共6页
Journal of Oil and Gas Technology
基金
教育部科学技术研究重大项目(10419)。
关键词
盆地中心气系统
异常压力
成藏机理
成藏模式
准噶尔盆地
basin-centered gas system
abnormal high pressure
reservoir forming mechanism reservoir forming mode
Junggar Basin
