摘要
中国海相克拉通盆地具有时代老、规模小、多期活动、稳定性差的特点,因此海相盆地古隆起的规模相对较小,而且活动性较强,本文根据古隆起的地质结构和构造活动性,将其分为稳定型、反转型、迁移型、沉没型和肢解型5种类型,并结合最新的勘探进展对各类古隆起的控油气作用进行了剖析,研究表明:稳定型古隆起的油气主要富集在隆起的核部与斜坡部位,反转型古隆起油气主要富集在斜坡和枢纽带,迁移型古隆起主要富集在斜坡部位,沉没型和肢解型控油气作用较弱;随着油气勘探向深层拓展,油气"近源、优储"的成藏特征更为明显,古隆起斜坡部位邻近烃源岩的短期暴露溶蚀储层和多期断裂发育带是油气新发现的重要地区,古隆起与古老拉张槽叠加部位,具有优越的成藏匹配关系,成为深层油气勘探的新热点;塔里木盆地塔中-塔北古隆起下斜坡部位的阿满过渡带、鄂尔多斯盆地中央古隆起深层元古宙拉张槽两侧、四川盆地川中古隆起深层震旦纪—寒武纪拉张槽两侧等地区是海相深层大型—超大型油气田富集的有利地区。
Marinecratonic basins of China are characterized by old ages, small scale, multiple activities and poor stability. However, the paleouplifts in marine basins are relatively small in sizes but strong in activity. On the basis of geological structures and tectonic activities, paleouplifts have been divided into stable, inversion, migrated, sinked and dismembered types. Combined with the latest progress in oil and gas exploration, this study analyzed controlling effect of each uplift on hydrocarbon accumulation. Results show that oil and gas is mainly concentrated in the core and the slope sections of stable paleo-uplifts, in the slope and the hub areas of inversion paleouplift, the slope of migrated paleo-uplift. The sinked and dismembered paleo-uplifts play a minor role in oil and gas accumulation. With the exploration towards deeper field, the characteristics of ＂near source and excellent reservoir＂ are more obvious. The early short- term exposure of karst reservoir and multi period faulted belt on the slope of paleo-uplifts near source rocks is an important newly discovered area for oil and gas. The paleo-uplift and extensional trough superimposed parts have superior accumulation matching relationship, and become new hot spots for deep sequence oil and gas exploration. The Aman transition area of Tazhong and Tabei paleo-uplifts in the Tarim basin, the both sides of Proterozoic extensional groove under central paleo-uplift in the Ordos basin, and the both sides of Sinian-Cambrian extensional groove under central paleo-uplift in Sichuan basin are favorable areas for accumulation of superlarge or large oil and gas fields in deep marine strata.
作者
孙冬胜
李双建
云金表
孙宜朴
孙润轩
SUN Dongsheng LI Shuangjian YUN Jinbiao SUN Yipu SUN Runxuan(Research Institute of Petroleum Eerploration and Production, SINOPEC, Beijing, 100083 State Key Laboratory of Shale Oil and Gas Accumulation Mechanism and the Effective Development, Beijing, 100083 School of Earth Sciences ,China University of Petroleum ,Beijing , 102249)
出处
《地质学报》
EI
CAS
CSCD
北大核心
2017年第7期1589-1603,共15页
Acta Geologica Sinica
基金
国家科技重大专项(编号2016ZX05005-001)
国家重点基础研究发展计划(编号2012CB412800)
国家自然科学基金项目(编号40739904)联合资助成果
作者简介
孙冬胜，男，1964年生。教授级高级工程师，主要从事石油地质研究工作。Email：sunds．syky@sinopec．com。
