准噶尔盆地西北缘石炭系火山岩断层封堵史与油气成藏  

Fault Plugging History and Hydrocarbon Accumulation of Carboniferous Volcanic Rock in the Northwestern Margin of Junggar Basin

作　　者：高长海[1,2] 张嘉豪 江汝锋 GAO Changhai;ZHANG Jiahao;JIANG Rufeng(School of Geosciences,China University of Petroleum（East China）,Qingdao 266580,Shandong,China;Function Laboratory of Marine Geo-resource Evaluation and Exploration Technology,Pilot National Laboratory for Marine Science and Technology（Qingdao）,Qingdao 266580,Shandong,China;Research Institute,Zhangjiang Branch of CNOOC,Zhanjiang 524057,Guangdong,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266580 [3]中海油湛江分公司研究院,广东湛江524057

出　　处：《西安石油大学学报（自然科学版）》2018年第6期1-7,共7页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家科技重大专项"大型地层油气藏油气源分析与输导体系研究"(2017ZX05001001-006);山东省自然科学基金"碎屑岩不整合储层成岩胶结作用及其对储层物性的影响"(ZR2017MD028)

摘　　要：在三维地震资料解释的基础上,运用断面古压应力与最大古落差相结合的方法,恢复了准噶尔盆地西北缘断层活动史和封堵史,探讨了断层控藏作用。准噶尔盆地西北缘石炭系火山岩发育区的断层活动史划分为早中三叠世活动间歇期、中晚三叠世强烈活动期、早中侏罗世活动间歇期和白垩纪后静止期,相比低级次断层,高级次断层活动具"强度大、时间早、期次多"的特征。断层封堵史划分为深成型和浅成型,深成型断层在中晚三叠世的输导性能以及早中侏罗世和白垩纪后的封堵性能好于浅成型,与油气充注期配置良好,油气藏表现为多期成藏特征;而浅成型断层在早中三叠世的封堵性能较好,油气藏表现为晚期成藏特征。On the basis of 3D seismic data, the activity history and plugging history of the main faults in the northwestern margin of Junggar Basin were recovered comprehensively using Paleo compressive stress offault surface and maximum paleo-fall, and the effects of the faults on hydrocarbon accumulation are discussed. The results show that the fault activity history in the study area can be divided into the intermittent period in Early-Middle Triassic ,the intense activity period in Middle-Late Triassic, the intermittent period in Early-Middle Jurassic and the static period after Cretaceous, the activity of high-level faults is more intense, earlier and more times than that of lower-level faults. According to the fault plugging history, the faults in the study area can be classified into deeply-formed faults and shallowly-formed faults, the paleo-transporting performance of the deeply-formed faultsin Middle-Late Triassic and their paleo-plugging in Early-Middle Jurassic and after Cretaceous are better than those of the shallowly-formed faults, which are more favorable to hydrocarbon migration and aeeunmlation, and results in multi-stage hydrocarbon accunmlation. While the paleo-plugging performance of the shallowly-formed faults was better in Early-Middle Triassic,which leads to late-stage hydrocarbon accumulation.

关 键 词：断层活动史 断层封堵史 油气成藏 石炭系 准噶尔盆地西北缘 

分 类 号：TE121[石油与天然气工程—油气勘探]