沧东中生界火山岩特征与油气成藏模式  

Geologic Characteristics and Hydrocarbon Accumulation Model of Mesozoic Volcanic Rocks in Cangdong Area

作　　者：周立宏[1] 李洪香[1] 杨朋[1] 林伶[1] 曲宁[1] Zhou Lihong Li Hongxiang Yang Peng Lin Ling Qu Ning(PetroChina Dagang Oilfield Company, Tianjin 300280, Chin)

机构地区：[1]中国石油大港油田分公司,天津300280

出　　处：《特种油气藏》2017年第3期9-14,共6页Special Oil & Gas Reservoirs

基　　金：中国石油科技重大专项"大港油区大油气田勘探开发关键技术研究"(2014E-06-03)

摘　　要：针对沧东地区火山岩发育、构造运动强烈、控藏因素复杂的问题,在分析火山岩发育构造背景与分布的基础上,综合运用钻井、地震及分析化验等成果,分析沧东地区火山岩地质特征与油气成藏模式。研究结果表明:受基底走滑带控制,火山岩呈NNW向展布,形成南、北2个火山喷溢中心复合体;平面上,火山岩相带围绕喷溢中心呈环带状分布;喜山期断裂活动形成立体供油网络,与孔二段有效烃源岩匹配,构成了源储侧接-近源充注、断储接力-横向输导2种运聚体系。该研究为进一步落实沧东地区大中型火山岩油气藏提供了依据。Cangdong area is characterized by developed volcanic rocks,strong tectonic movement and complicated reservoir controlling factors. In this paper,the tectonic setting of volcanic rock development and the distribution of volcanic rocks were investigated. Then,geologic characteristics and hydrocarbon accumulation models of volcanic rocks in Cangdong area were analyzed by using drilling,seismic and assay results comprehensively. It is indicated that under the control of strike-slip belts at the basement,volcanic rocks are distributed along NNW,and two volcano eruption center complexes（ i.e. south and north） are formed. In area,volcanic lithofacies are distributed in the shape of girdle around the eruption centers. In Himalayan faulting stage,stereo oil supply networks were formed,and combined with the effective source rocks of Kong 2 Member,constituted two migration and accumulation systems,i.e.,lateral contact between source rocks and reservoirs-proximal charging,and alternation between faults and reservoirs-lateral migration. The research results provide the basis for the further confirmation of large and middle volcanic oil and gas reservoirs in Cangdong area.

关 键 词：火山岩 火山岩岩相 地质特征 喷发模式 运聚模式 中生界 沧东地区 

分 类 号：TE122.2[石油与天然气工程—油气勘探]