辽西低凸起北段源—汇系统精细描述与油气勘探实践  

Source-to-Sink System Fine Description and Petroleum Exploration Practice of the Northern Section of Liaoxi Low Uplift

作　　者：宋章强 杜晓峰 王启明 加东辉 李晓辉 

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《地球科学（中国地质大学学报）》2017年第11期2069-2080,共12页Earth Science-Journal of China University of Geosciences

基　　金：国家科技重大专项(No.2016ZX05024-003)

摘　　要：辽西低凸起北段现存物源区范围小,长期被认为供源能力不足缺乏优质储层而成为勘探"禁区".为理清辽西低凸起北段物源面貌及沉积储层分布规律,综合利用钻井、测井和三维地震资料,对古物源区面貌、古沟谷与坡折体系等源-汇要素精细描述,预测了富砂沉积体平面分布,并探讨了砂体差异富集的控制因素.结果表明:研究区自南向北发育多个孤立的"链状岛"状隐性物源区,并发育半充填型和侵蚀型两类古沟谷及8种坡折带组合类型,多个近源沉积体环物源分布.源-汇耦合关系决定了砂体的富集程度,其中物源区大小及持续发育时间是影响砂体发育的决定性因素,断裂活动及坡折带类型进一步决定了不同位置砂体富集程度的差异性.上述新认识指导发现了锦州25-1、锦州20-2北两个油气田.The northern section of Liaoxi low uplift used to be regarded as a＂forbidden zone＂for exploration because it has been believed to be short of generation supply capacity and high-quality reservoirs as a result of its small existing provenance area.In order to determine the provenance features and distribution of reservoir of northern section of Liaoxi low uplift,drilling,logging and 3 Dseismic data are used for the fine description of the elements of Source-to-Sink system,including ancient provenance features,ancient valleys and slope break system in this study.In addition,the horizontal distribution of sand rich deposits is predicted,and the controlling factors of differential enrichment of sand were are discussed.It is found that the recessive provenance areas developed are distributed from south to north in a shape of several isolated archipelagos in the study area.What＇s more,two kinds of ancient valleys,namely,half filling type and erosion type,and 8 kinds of combination type of slope break zone also develop in the study area and several proximal sedimentary deposits are distributed around the provenance.The coupling relationship of Source-to-Sink plays a decisive role in the enrichment degree of sand bodies,among which the size and duration of provenance are the determining factors in the development of sand bodies.Furthermore,the fault activity and types of slope break further determine the difference of the enrichment degree of sand bodies in different positions.The study results have been applied in the discovery of Jinzhou 25-1 and Jinzhou 20-2 Noil and gas fields.

关 键 词：源-汇系统 隐性物源 沉积储层 勘探实践 辽西低凸起 石油地质. 

分 类 号：P618[天文地球—矿床学]