海洋地质前沿2024，Vol.40Issue(4)：18-28,11.DOI:10.16028/j.1009-2722.2023.147
辽西凸起南段沙河街组双向物源沉积模式及油气勘探意义
Double-provenance depositional model and oil-gas exploration significance in Shahejie Formation,the southern segment of Liaoxi Uplift
摘要
Abstract
The development level of Paleogene reservoirs has always been a key factor restricting exploration breakthroughs in the southern segment of the Liaoxi Uplift.We used basic data from drilling,apatite fission track analysis,and three-dimensional seismology to focus on the reservoir development of the Shahejie Formation evol-ution analysis and semi-quantitative characterization of paleogeomorphology were carried out to predict the Shahejie Formation reservoir in the target area.Results indicate that the southern segment of the Liaoxi Uplift mainly experienced four evolutionary periods,i.e.tectonic uplifting in the early Cenozoic,tectonic subsidence during Shahejie Age in the Paleogene,tectonic inversion during Dongying Age in the Oligocene,and tectonic fi-nalization in the Neogene.The fault system in the area can be divided into three types:long-term active type,early faulting early declining type,and late faulting late declining type.The Liaoxi Sag congenital source supply condi-tion of"basin full and sand overflow",and the segmented characteristics of tectonic evolution have led to the formation of a special"chain island bay"sedimentary model in the southern segment of the Liaoxi Uplift.It can provide material sources for the surrounding area,form near source sedimentary bodies,and also form a large ac-commodating space,converging the overflowing sand bodies from the Liaoxi Sag,forming a double-provenance sedimentary model on the Liaoxi Uplift.The above understanding has effectively promoted the evaluation of the Lvda 4-3 Oilfield and has good reference significance for oil and gas exploration in uplift area.关键词
辽西凸起/构造演化/双物源/链状岛湾/沉积模式Key words
Liaoxi Uplift/tectonic evolution/double provenance/chain island bay/deposition model分类
海洋科学引用本文复制引用
惠冠洲,王鑫,王冰洁,赵婧,张江涛..辽西凸起南段沙河街组双向物源沉积模式及油气勘探意义[J].海洋地质前沿,2024,40(4):18-28,11.基金项目
中海石油(中国)有限公司"七年行动计划"重大科技专项课题"渤海油田上产4000万吨新领域勘探关键技术"(CNOOC-KJ135ZDXM36TJ08TJ) （中国）
