隐性走滑断裂识别标志及其与油气聚集的关系——以青东—莱州湾构造带为例  

Identification marks of subtle strike-slip faults and its relationship with hydrocarbon accumulation in Qingdong-Laizhouwan tectonic belt

作　　者：吴俊刚 王昕 柴永波 陈保柱 朱莎[2] 

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459 [2]大庆油田有限责任公司第四采油厂,黑龙江大庆163511

出　　处：《东北石油大学学报》2017年第3期1-8,共8页Journal of Northeast Petroleum University

基　　金：国家科技重大专项(2016ZX05024-003)

摘　　要：为了研究郯庐断裂带隐性走滑断裂特征和发育机制,确定它对油气成藏的控制作用,利用青东—莱州湾构造带高精度三维地震和钻井资料,研究隐性走滑断裂的构造特征、识别标志、断裂样式及成因机制,分析它与油气聚集关系。结果表明:研究区隐性走滑断裂可归纳5种识别标志:(1)断裂走向一致、倾向相反;(2)断裂平面变形明显、两侧地层产状突变;(3)断裂两侧地层厚度、地震相差异大;(4)断裂呈直立"栅栏状"特征;(5)断裂两侧油水关系不统一。包括潜山直立型、盆缘调节型、盆内末端型和盆内桥连型四类构造样式。该区隐性走滑断裂的大量发育与喜山运动向东挤出、太平洋板块向西俯冲的共同作用有关;隐性走滑断裂对圈闭形成、沉积特征和油气的运聚具有明显控制作用。该结果可以有效指导研究区油气二次勘探,为走滑断裂带的精细勘探提供参考。In order to study the characteristics and mechanism of the subtle strike slip faults developed in the Tanlu fault zone,to clarify the controlling effect on hydrocarbon accumulation,based on the latest research results of strike slip fault theory,comprehensive utilization of high precision 3Dseismic data and drilling data in the Qingdong-Laizhouwan tectonic belt,the structural characteristics,identification marks,fracture patterns and genetic mechanism of the subtle strike slip faults are studied,the relationship between oil and gas accumulation is analyzed.The results are as follows:The identification marks of five kinds of strike slip faults are summarized,there are four kinds of structural styles of the subtle strike slip fault,the vertical type of Qianshan,the adjustment of the basin margin,the end of the basin and the bridging type in the basin.The development of the subtle strike slip faults in the Tanlu fault zone may be related to the remote effect of the eastward movement of the Himalayan orogeny and the westward subduction of the Pacific plate.The subtle strike slip fault has obvious control effect on trap formation,sedimentary characteristics and migration and accumulation of oil and gas.Oil and gas exploration process in the region,and recognition method and implicit understanding of strike slip faults and successfully guided the second exploration,the discovery of oil geological reserves of nearly 100 million tons of oil and gas exploration has achieved good results,open the new situation of Tanlu strike slip fault zone 'fine' exploration.

关 键 词：隐性走滑断裂 识别标志 油气聚集 二次勘探 郯庐断裂 青东-莱州湾构造带 

分 类 号：TE122.1[石油与天然气工程—油气勘探]