渤海西部海域新生代构造与演化及对油气聚集的控制  

Cenozoic tectonic evolution and its control on the hydrocarbon accumulation of the western Bohai Sea

作　　者：黄雷[1,2] 周心怀 王应斌 韦阿娟 刘廷海 武强 江涛 

机构地区：[1]西北大学大陆动力学国家重点实验室,西安710069 [2]中海石油(中国)有限公司天津分公司,天津塘沽3004521

出　　处：《地质科学》2013年第1期275-290,共16页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家科技重大专项(编号:2011ZX05023)资助

摘　　要：渤海西部处于渤海湾盆地黄骅坳陷中北区,东与渤中坳陷衔接,周临多个新生代富(含)烃洼陷,该区具有较大的油气勘探潜力。本文利用区内现有的大量勘探资料对其基本构造特征、演化史及其对油气聚集的控制作用进行了详细的研究与探讨。认为研究区整体构造格架受近东西向、北东向、北西向3组基底断裂控制,近东西向和北西向断层控制古近纪断陷及区内整体构造格局,而北东向与北西向断层在新近纪发生较强烈的走滑活动;研究区新生代经历了多阶段演化过程,同时又整体表现出具隆拗过渡、整体隆升的演化背景;复杂多阶段的演化过程使得区内油气多层位复式成藏;另外,新近纪晚期构造活跃使得区内油气多在新近系浅层晚期成藏,并沿北西向与北东向断层优势成藏展布。The western Bohai Sea is located on the conjunct zone of the middle and northern Huanghua Depression and Bozhong Depression in the Bohai Bay Basin. It contains several Cenozoic petroliferous sags, and therefore, this area has a lager hydrocarbon exploration potential. In this study, the tectonic evolution and its control on the hydrocarbon accumulation of the Cenozoic basin in western Bohai Sea are studied with large quantities of exploration data. The results show that, the structural framework was controlled by the three groups of fault systems,the E-W-trending,NW-trending and NE-trending faults; the E-W-trending and NW- trending faults controlled the Paleogene rifting, whereas during the Neogene, the NW-trending and NE-trending faults occurred intensive reactivation with a large component of sinistral-slip and dextral-slip movements, respectively; the study area underwent six evolutionary stages during Cenozoic, the initial rifting stage during Kongdian period, regional uplift and eroded stage during Sha4 period,widely and intensively rifting stage during Sha3 period, rift-depression transition stage during Sha2-Shal-Dongying period, the post-rift stage during Guangtao and lower Minghuazhen periods,the tectonic reactivation from upper Minghuazhen period to now; just because this multiple evolutionary process resulted that the hydrocarbon can accumulate in several layers in this area, besides, the intensive Neogene tectonic reactivation resulted more hydrocarbon occurring in the shallow level, and with a characteristic of distributing along the NW-trending and NE-trending faults.

关 键 词：渤海西部 构造演化 区域应力场 油气聚集 

分 类 号：P542[天文地球—构造地质学] TE121[天文地球—地质学]