歧口凹陷辉绿岩成藏条件分析  

Analysis of hydrocarbon reservoirs associated with diabase in the Qikou depression of Dagang oilfield,eastern China

作　　者：苏立萍[1] 王振升[1] 史卜庆 孙福利[3] 米兴夺[1] 

机构地区：[1]中油大港油田分公司,天津300280 [2]中油天然气勘探开发公司,北京100034 [3]中科院地质与地球物理研究所,北京100029

出　　处：《特种油气藏》2011年第5期29-32,136,共4页Special Oil & Gas Reservoirs

基　　金：中石油股份公司歧口专项之四"潜山;火成岩油气藏条件及勘探突破口选择"(2008E-0604)

摘　　要：从钻井标定、地震预测的侵入体宏观分布及勘探现状入手,依据钻井实验分析数据及对歧口凹陷辉绿岩体的岩心观察、铸体薄片鉴定、岩性及蚀变特征等研究,认为该类岩体主要侵入沙一段至东营组地层,其储层以各种成因裂缝、接触变质及围岩蚀变形成的储集空间为主。通过综合分析歧口凹陷的油气成藏要素及时空配置关系,得出其辉绿岩油气藏的成藏模式,进一步指明歧口凹陷辉绿岩体的油气勘探潜力。The diabase in the Qikou depression of Dagang oilfield,eastern China is analyzed for lithology and alteration characteristics through core observation and cast thin section identification based on analytical data of drilling demarcated and seismic predicted distribution of diabase intrusion.It is concluded that the diabase intrusion mainly occurs in formations from Es1 to Ed,with dominant reservoir space formed by fractures of various genesis,contact metamorphism and wall rock alteration.This paper analyzes the key elements of hydrocarbon accumulation and their spatial and temporal configuration,presents the accumulation model of diabase reservoir,and indicates exploration potential in the diabase rocks in Qikou depression.

关 键 词：油气成藏 储层特征 辉绿岩 成藏潜力 歧口凹陷 

分 类 号：TE122.1[石油与天然气工程—油气勘探]