辽河坳陷太古宇变质岩内幕油藏成藏特征  

Forming features of interior reservoir in metamorphic rock of Archean Eonothem,Liaohe depression

作　　者：马志宏[1] 

机构地区：[1]中国石油辽河油田分公司勘探开发研究院,辽宁盘锦124010

出　　处：《油气地质与采收率》2013年第2期25-29,112,共5页Petroleum Geology and Recovery Efficiency

基　　金：中国石油天然气股份有限公司项目"成熟探区油气分布规律与精细勘探技术研究"(2011D-07)

摘　　要：太古宇变质岩内幕油藏的发现是辽河坳陷基岩勘探的重大突破,改变了以往只有变质岩风化壳才能形成油气成藏的认识,丰富了辽河坳陷基岩油气成藏理论,是今后重要的勘探目标。但随着勘探的不断深入,明确太古宇变质岩内幕油藏的成藏特征显得越来越重要。为此,从典型的太古宇变质岩内幕油藏入手,首先对其原油性质进行分析,然后对兴古7、沈311和赵古1等油藏进行剖析,最后总结出成藏特征。辽河坳陷太古宇变质岩内幕油藏的原油性质整体较好,属于轻质原油;其成藏特征为油源充足、裂缝型储层与隔层交互分布、具有多类型输导体系和良好的侧向封挡条件。其中,油源充足是成藏的基础,控制了油气的富集程度;裂缝型储层与隔层交互分布是成藏的关键;多类型输导体系和良好的侧向封挡条件是成藏的保障。It has been a great breakthrough of bed rock exploration in Liaohe depression that the interior reservoirs are found in the metamorphic rock of Archean Eonothem. Because the current understanding constrained that only the weatbered crust of metamorphic rock can form reservoirs, and it has been changed, and that, the formation theory of hydrocarbon reservoirs of bed rock in Liaohe depres sion has been enriched. The interior oil pools in metamorphic rock of Arc, bean Eonothem in Liaohe depression will be important prospective target because it has important potential capacities for exploration. With continuous exploration, the new difficulty questions will gradually appear, so, it will become more important that the formation features of interior oil pools in metamorphic rock of Archean Eonothem should be clarified. This paper discusses the known interior reservoir in metamorphic rock of Archean Eonothem. Firstly,their properties of crude oil are analyzed, then, the formation features of known interior reservoir, such as XingguT, Shen311, Zhaogul and so on, are presented, ultimately, the formation features of interior reservoir in metamorphic rock of Archean Eonothem in Liaohe depression are proposed. The theoretical knowledge in this paper will have important directive significance for the exploration of interior oil pools in metamorphic rock of Archean Eonothem in Liaohe depression and other similar exploration areas all over the world.

关 键 词：太古宇 变质岩 内幕油藏 成藏特征 辽河坳陷 

分 类 号：TE112.33[石油与天然气工程—油气勘探]