临清坳陷东濮凹陷新近系油气网毯式成藏条件和特征初探  

AN APPROACH TO THE NEOGENE MESHWORK-CARPET OIL AND GAS POOL-FORMING SYSTEM IN THE DONGPU SAG,LINQING DEPRESSION

作　　者：石砥石[1] 王永诗[1] 王亚琳[1] 杨贵丽[1] 

机构地区：[1]中国石油化工股份有限公司胜利油田分公司地质科学研究院,山东东营257015

出　　处：《地质科学》2007年第3期417-429,共13页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：中国石化科技攻关项目"东濮凹陷隐蔽油气藏成藏规律及勘探目标研究"的部分成果

摘　　要：网毯式成藏体系作为近几年发展起来的油气成藏理论,在济阳坳陷乃至渤海湾盆地新近系隐蔽油气藏勘探过程中发挥了重要的指导作用。东濮凹陷作为渤海湾盆地的一部分,至今尚未发现新近系油气田。本文运用网毯式油气成藏体系的研究方法,分析了东濮凹陷西部斜坡带新近系成藏条件,认为馆陶组块状砂岩层厚度大,分布广,物性和连通性好,是本文所称的“毯”;长期活动的断层连通了古近系烃源岩和“毯”,是油气运移的网。由此建立的东濮凹陷油气成藏模式指出馆陶组是主要勘探目的层,可以形成与济阳坳陷斜坡带类似的新近系地层超覆油藏,具有古地貌形态控制油藏分布、连续性差和油水关系复杂等特点。The meshwork-carpet type oil and gas pool-forming systems, as a new theory on oil-gas accumulation, have played an important role to subtle trap exploration in the Neogene of the Jiyang Depression, Bohai Bay Basin. So far, the Neogene oil-gas field in the Dongpu Sag, Linqing Depression, had been rarely discovered. For changing the situation and applying the principle of meshwork-carpet oil and gas pool-forming systems, the conditions of pool-forming were analyzed in the Neogene of the West Slope of the Dongpu Sag. The Guantao Formation dominated the thick sandstones with fine connection, which was considered to be the carpets. The long-term active faults, which linked the Paleogene source rocks and the carpets, were considered to be the meshwork of oil-gas migration. The Guantao Formation was considered to be the main exploration target-layer based on the hydrocarbon accumulation model presented in this paper. It could creat the Neogene strata overlap oil pools similar with that in the slope belt of the Jiyang Depression. In addition, its paleofeature of morphology controlled the distribution of reservoirs, the continuity was bad and the relationship between oil and water was complicated.

关 键 词：网毯式油气成藏体系 断层 油气运移 新近系 东濮凹陷 

分 类 号：TE121.1[石油与天然气工程—油气勘探]