歧口凹陷埕海地区中生代构造演化与盆地原型恢复  

Mesozoic tectonic evolution and basin prototype restoration in Chenghai area of Qikou sag

作　　者：楼达[1] 裴眼路[1] 李晓祥[2] 周淑慧[1] 朱桂娟[2] 米兴夺[1] LOU Da;PEI Yanlu;LI Xiaoxiang;ZHOU Shuhui;ZHU Guijuan;MI Xingduo(Exploration and Development Research Instiute, PetroChina Dagang Oilfield Company, Tianjin 300280,China;Exploration Enterprise, PetroChina Dagang Oilfield Company, Tianjin 300280,China)

机构地区：[1]中国石油大港油田分公司勘探开发研究院,天津300280 [2]中国石油大港油田分公司勘探事业部,天津300280

出　　处：《录井工程》2020年第S01期72-78,共7页Mud Logging Engineering

摘　　要：大港埕海地区位于歧口凹陷南缘,是盆缘构造变形较为剧烈的地区,由于新生代阶状断陷的叠加作用,导致该地区中生界构造样式异常复杂。长期以来,对埕海地区中生代构造轮廓、演化过程的认知不明确,限制了对该区域中生界储集层分布的认识。利用新高精度三维地震资料和钻井数据,运用平衡剖面和盆地原型恢复技术,开展了埕海地区中生代变形研究,明确了中生界残留地层展布特点,并通过剖析古构造演化过程,探讨了盆地原型形成与演化过程。研究表明,中生代期间华北克拉通古东部高原的形成与垮塌过程对埕海地区中生界地层分布具有决定性的影响。根据构造变形分析成果,初步明确了埕海地区侏罗系碎屑岩潜山油气勘探方向。Dagang Chenghai area is located in the south margin of Qikou sag.It is a region with severe structural deformation at the basin margin.Due to the superposition of Cenozoic stepped fault depressions,the Mesozoic structural pattern becomes extremely complex.For a long time,the cognition of Mesozoic structure outline and evolution process in Chenghai area are not clear,which limits the understanding of Mesozoic reservoir distribution.In this paper,the Mesozoic deformation in Chenghai area is studied by using the new high-precision 3D seismic data and drilling data,the balanced section and the basin prototype recovery technique,and the distribution points of the Mesozoic residual strata are defined.The formation and evolution of basin archetype are discussed by analyzing the evolution process of paleostructure.Studies have shown that the formation and collapse of paleo-eastern plateau of the north China craton during the Mesozoic era had a decisive influence on the distribution of Mesozoic in Chenghai area.Based on the results of structural deformation analysis,the oil and gas exploration direction of Jurassic clastic rock buried hill in Chenghai area was preliminarily defined.

关 键 词：埕海地区 高精度三维地震 构造演化 盆地原型 中生代 油气勘探 

分 类 号：TE132.1[石油与天然气工程—油气勘探]