郯庐断裂带东支复杂构造区正断层成因模式及刻画研究——以渤海P油田为例  

Genesis mechanism and characterization of normal faults in complex structural area of Tanlu fault zone east branch-taking P oilfield in Bohai Sea as an example

作　　者：孟云涛 韩建斌 汪利兵 刘建华 杨青 MENG Yuntao;HAN Jianbin;WANG Libing;LIU Jianhua;YANG Qing(Tianjin Branch,CNOOCCo.,Ltd.,Tianjin 300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《天津科技》2025年第2期23-25,29,共4页Tianjin Science & Technology

摘　　要：P油田构造位于郯庐断裂带东支、渤南凸起带中段的东北端,整体呈近南北走向,由北向东新近系地层内发育一系列“似花状”正断层组合,在平面上呈“垒-堑”相间的构造。基于断层性质、区域构造演化及构造应力作用机制等,认为该区“似花状”正断层并非区域走滑断层的伴生断层,而是在区域热沉降差异作用下,基底泥岩塑性变形产生的伸展作用。根据“似花状”正断层成因,提出针对性的资料处理和断裂系统识别技术,即多信息驱动的气云区成像改善及频率域多尺度断裂检测技术,通过精细化断层描述,指导油田16号区块构造精细解释和井位优化部署,为井位实施优化调整和油田高效开发提供指导。The P oilfield structure is located in the northeastern end of the Tanlu fault zone’s eastern branch and the middle section of the Bohai South uplift zone.The structure as a whole has a nearly north-south trend and develops a series of“flower-like”normal faults in the recent strata from north to south.In the plane,it presents a“ridge-trench”alternating structural feature.Through research on the fault properties,regional tectonic evolution,and structural stress action mechanism,this paper believes that the“flower-like”normal faults in the area are not the accompanying faults of regional strike-slip faults,but are formed by the plastic deformation of the basement mudstone under the action of regional thermal subsidence differences.Based on the genesis of“flower-like”normal faults,targeted data processing and fault system identification technologies were proposed:multi-information-driven gas cloud area imaging enhancement and frequency domain multi-scale fault detection technology.Through fine fault description,the paper guides the detailed interpretation of the 16 block structure and the optimal deployment of wells,providing guidance for the optimization of well positions and the efficient development of the oilfield.

关 键 词：“垒-堑”相间构造 热沉降 构造再活动 “似花状”正断层 断裂检测 

分 类 号：TE112.2[石油与天然气工程—油气勘探]