昌吉凹陷西斜坡不整合对地层圈闭的控制作用

Control effect of unconformity structure of west slope of Changji Sag on stratigraphic traps

姚文礼 王利 刘诗茵 侯玉花 白天阳 刘群

长江大学工程技术学院资源勘查工程学院，湖北 荆州 434020 中国石油新疆油田分公司风城油田作业区，新疆 克拉玛依 834000 中油国际管道公司，北京 100000 中国石油集团渤海钻探工程有限公司第二录井分公司，河北 任丘 062552 中国石油新疆油田分公司陆梁作业区，新疆 克拉玛依 834000）

College of Resources Exploration Engineering, Yangtze University, Jingzhou 434020, China Fengcheng Field Operation Area, Xinjiang Oilfield Company, PetroChina, Karamay 834000, China SINO?鄄Pipeline International Company, Beijing 100000, China No.2 Logging Branch, Bohai Drilling Engineering Co., Ltd., CNPC, Renqiu 062552, China Luliang Field Operation Area, Xinjiang Oilfield Company, PetroChina, Karamay 834000, China)

为了明确昌吉凹陷西斜坡地层油气藏分布特征及下一步勘探方向，文中在三维地震精细解释的基础上，综合应用测井、录井等资料，系统分析了研究区不整合结构的宏观样式及分布规律，进一步结合不整合的宏观样式以及不整合面上下地层岩性组合的配置方式，研究了地层圈闭的控制因素。研究表明：由凹陷区向凸起区依次发育平行式、平超式、截超式以及截平式等4种不整合宏观样式；针对不同宏观样式，系统开展盖层条件（泥岩顶板、风化黏土层）、遮挡条件（断裂、地层超覆线及地层削蚀线）等圈闭要素分析是在斜坡区寻找地层圈闭的关键。

In order to clarify the distribution characteristics and future exploration direction of the stratigraphic reservoirs in the west slope of Changji Sag, the macro?鄄styles and distributive rules of unconformity structure are analyzed systematically in this paper by using the data of well logs and drilling records with fine 3D seismic data interpretation. The controlling factors of stratigraphic traps are further studied considering the configuration modes between the macro?鄄styles and the lithological association around the surfaces of unconformity. The research suggests that four types of macro?鄄styles, such as parallelism?鄄parallelism, parallelism?鄄overlap, truncation?鄄overlap and truncation?鄄parallelism were developed from the depression area to the bulge area in turn in the study area. Systematic analysis of cap rock condition (mudstone roofs and weathered clay layers) and occlusion condition (fault and stratigraphic overlying lines and erosion lines) are the key to searching for stratigraphic traps in the slope area.

10.6056/dkyqt201905001