准噶尔盆地阜康凹陷东部中/上二叠统不整合结构特征及控藏作用  

Characteristics and reservoir-control effect of Upper/Middle Permian unconformity structures in the east of Fukang Sag,Junggar Basin

作　　者：唐勇[1] 纪杰 郭文建[1] 陈洪[1] 李彦颖 董方 TANG Yong;JI Jie;GUO Wenjian;CHEN Hong;LI Yanying;DONG Fang(PetroChina Xinjiang Oilfield Company,Karamay,Xinjiang 834000,China;School of Ecology,Resource and Environment,Dezhou University,Dezhou,Shandong 253023,China;School of Geosciences,China University of Petroleum(East China),Qingdao,Shandong 266580,China)

机构地区：[1]中国石油新疆油田公司,新疆克拉玛依834000 [2]德州学院生态与资源环境学院,山东德州253023 [3]中国石油大学(华东)地球科学与技术学院,山东青岛266580

出　　处：《石油地球物理勘探》2022年第5期1138-1147,I0007,共11页Oil Geophysical Prospecting

基　　金：国家科技重大专项“地层圈闭描述及有效性分析技术研究”(2017ZX05001-003-004)资助。

摘　　要：不整合纵向结构体中的高孔渗带与不同结构层组成的储盖组合常形成类型多样的岩性、地层圈闭。为此,通过井震结合,综合不整合之上、下地震反射特征,可将准噶尔盆地阜康凹陷东部中/上二叠统不整合划分为平行—平行、平行—削截、平行—褶皱、超覆—削截和超覆—褶皱等五种类型;利用测井资料构建判别参数,识别不整合体结构,分析其发育规律及控制因素;根据钻探成果,建立不整合结构体控藏模式。研究表明,不整合体结构主要受剥蚀量、母岩岩性及构造部位高低的控制,不整合结构体上层与中层厚度呈负相关;超覆—削截不整合区域为油气藏有利发育区;不整合上层结构中的水进砂体,是不整合体油气勘探的有利目标,湖(海)湾区易形成地层超覆油气藏。该成果对其他类似地区不整合油气藏勘探具有借鉴意义。The high porosity and permeability zones in longitudinal structures of unconformity and the reservoir-cap combinations composed of different structural layers can form various types of lithologic stratigraphic traps.Therefore,through the combination of logging and seismic data and the integration of the upper and lower seismic reflection characteristics of unconformity,the Middle/Upper Permian unconformity in the east of Fukang Sag in Junggar Basin are divided into five types:parallelparallel,parallel-cut,parallel-fold,overlap-cut,and overlap-fold.The logging data is used to construct the determinant parameter to identify unconformity structures and analyze their development laws and controlling factors.Then,the reservoircontrol model of unconformity structures is built on the basis of the drilling results.The research reveals that the unconformity structures are mainly controlled by the erosion amount,lithology of mother rock,and the depth of the structures,and the thickness of the upper layer is negatively correlated with that of the intermediate layer in the unconformity structures.The unconformity area of overlap-cut is a favorable zone for developing oil and gas reservoirs.The water in the unconformity superstructure entering the sand body is a favorable target for oil and gas exploration of unconformity,and it is easy to form stratigraphic overlying oil and gas reservoirs in the lake(sea)bay area.The research result can provide a reference to the exploration of unconformity reservoirs in other similar areas.

关 键 词：准噶尔盆地 阜康凹陷 中/上二叠统 不整合类型 不整合结构 控藏作用 

分 类 号：P631[天文地球—地质矿产勘探]