车镇凹陷斜坡带沙三段油气运聚与成藏模式  

Hydrocarbon transportation system and reservoir forming model of Es_(3) in slope belt of Chezhen depression

作　　者：刘华[1,2] 赵珊 梁书义 郭勤涛[3] 祝永英[3] 韩晓 LIU Hua;ZHAO Shan;LIANG Shuyi;GUO Qintao;ZHU Yongying;HAN Xiao(School of Geosciences in China University of Petroleum(East China),Qingdao 266580,China;Laboratory for Marine Mineral Resources,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266071,China;Dongsheng Petroleum Development Group Company Limited of Shengli Oilfield,Dongying 257000,China)

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [2]海洋国家实验室海洋矿产资源评价与探测技术功能实验室,山东青岛266071 [3]胜利油田东胜精攻石油开发集团股份有限公司,山东东营257000

出　　处：《中国石油大学学报（自然科学版）》2021年第5期42-53,共12页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家自然科学基金项目(41772136);国家重大专项(2016ZX05006-003)。

摘　　要：以地质、地震、测井等资料分析为基础,对车镇凹陷斜坡带输导体系特征和油气运聚模式进行分析,明确斜坡带油气富集的主控因素。结果表明:车镇凹陷斜坡带的油气主要富集于沙三上亚段储层中,与沙三中下烃源岩存在直接接触、断层沟通等多种接触关系;成藏期油源断层活动性较弱,活动时间较长的1和2号断层控制了斜坡带沙三段油气的富集,从斜坡内带向外带,油气沿调节断层及其组合砂体向构造脊和骨架砂体发育区汇聚,在研究区西部7号断层处形成优势通道;研究区砂体物性差是斜坡内带钻井失利的主要原因;中带和外带的油气主要分布于断-砂组合控制下的优势运移路径附近,随着运移距离的增加,有效砂体的埋深逐渐抬升,呈现出“阶梯式”运移方式;综合来看,研究区源-储接触关系控制油气供应能力;优势运移通道控制油气运移指向;断-砂组合关系控制油气富集层位的变迁。Based on the analysis of geological,seismic and logging data,the characteristics of the transport system and the mode of hydrocarbon migration and accumulation in the slope belt of Chezhen depression are analyzed,and the main controlling factors of hydrocarbon enrichment in the slope zone are determined.The study shows that the hydrocarbon in the slope belt of Chezhen depression is mainly concentrated in the upper Es 3,which has direct contact with the source rocks of the middle and lower Es 3,and fault communication and other contact relationships.The fault of effective hydrocarbon source rocks is weak in the accumulation stage,and the activities of faults 1 and 2 are longer,which controls the accumulation of oil and gas in the slope belt from the inner slope to the outer slope.The hydrocarbon converges along the regulating faults and their combined sand bodies to the structural ridge and the skeleton sand body development area,forming a dominant channel at No.7 fault in the west of the study area.There are great differences in hydrocarbon accumulation conditions in different structural zones.The main reason for drilling failure is the poor physical properties of sand bodies in the inner slope zone;the hydrocarbon distribution in the middle and outer zones is mainly controlled by the change of dominant migration path under the control of fault sand combination.With the increase of migration distance,the effective sand body buried depth gradually increases,showing a"ladder"migration mode.On the whole,the source reservoir contact relationship controls the supply of hydrocarbon,the dominant migration channel controls the direction of oil and gas migration,and the fault sand combination relationship controls the change of hydrocarbon accumulation horizon.

关 键 词：输导体系 油气运移 失利井分析 成藏模式 斜坡带 车镇凹陷 

分 类 号：TE122.1[石油与天然气工程—油气勘探]