南堡凹陷北部东营组同沉积断裂对沉积体系及岩性圈闭的控制作用  

Syndepositional Fault Control on Types and Distribution of Depositional System and Lithologic Trap of Dongying Formation in the North of Nanpu Sag

作　　者：康海亮[1] 林畅松[2] 刘晓[3] 高平 

机构地区：[1]中国地质大学(北京)能源学院,北京100083 [2]中国地质大学(北京)海洋学院,北京100083 [3]中国石油冀东油田分公司勘探开发研究院,河北唐山063000 [4]北京科泰锐哲沃斯科技有限公司,北京100085

出　　处：《现代地质》2016年第2期286-293,共8页Geoscience

基　　金：国家重大科技专项项目(2011ZX05023-002-004)

摘　　要：同沉积断裂对断陷湖盆层序格架内沉积体系类型及发育分布具有重要的控制作用,也影响了岩性圈闭的发育,已成为当前石油地质领域研究的热点。以层序地层学理论为指导,综合南堡凹陷地震、测井、岩心等资料进行分析,研究认为其北部老爷庙、杜林和高南地区东营组为一个完整的二级层序,内部可划分为4个三级层序。受边界同沉积陡断裂、古地貌、物源供给及凹陷内同沉积断裂等因素影响,主要发育3种沉积体系组合样式及其相应的岩性圈闭类型:在西南庄边界断裂控制下,受物源供给和古地貌影响,老爷庙地区发育单断陡坡扇三角洲-湖底扇型,控制了砂岩透镜体圈闭的发育;杜林地区发育单断陡坡近岸水下扇-浊积扇型,此类型内岩性上倾尖灭圈闭发育;受柏各庄边界断裂和高柳同沉积断裂控制,高南地区发育多断阶扇三角洲前缘加厚型,易形成前缘分流河道砂和滑塌浊积扇砂体形成的岩性圈闭。The types and distribution of depositional systems and lithologic traps in the sequence stratigraphic framework are controlled by the syndepositional faults.It is a hot research topic in the petroleum geology field at present.The Dongying Formation in the north of Nanpu Sag including Laoyemiao-Dulin and Gaonan areas can be divided into a second-order sequence and four third-order sequences in the guidance of the theory of se-quence stratigraphy,combined with seismic,logging and core data.There are three types of sedimentary assem-blage styles under the control of boundary faults,palaeogeomorphology,sediment source and syndepositional faults.Controlled by Xinanzhuang boundary fault,source supply and palaeogeomorphology,a single-faulted steep slope pattern with fan delta and sublacustrine fan is developed in Laoyemiao,and the lithologic lenticular hydrocarbon reservoir is developed;a single-faulted steep slope pattern with nearshore subaqueous fan is deve-loped in Dulin,and the lithologic updip pinchout reservoir is developed.Controlled by the Baigezhuang bounda-ry fault and Gaoliu syndepositional fault,a multi-faulted slope pattern with thick layer fan delta front is deve-loped in Gaonan,and the lithologic trap controlled by distributary channel sand and turbidite fan sand body is inclined to form.

关 键 词：同沉积断裂 沉积体系 岩性圈闭 东营组 南堡凹陷 

分 类 号：P512.2[天文地球—地质学] P539.2