松辽盆地南部黑1工区黑帝庙油层嫩四段沉积演化规律

Sedimentary Evolution of Nen-4 member of Heidimiao Oil Layer in Hei-1 Work Area,Southern Songliao Basin

综合利用岩心资料、分析化验测试资料以及测录井资料,以沉积学和高分辨率层序地层学理论为指导,在前人研究成果的基础上,对松辽盆地南部长岭凹陷黑1工区黑帝庙油层嫩江组四段储层进行研究。研究表明:松辽盆地南部黑1工区黑帝庙油层嫩四段主要发育有浅水三角洲相和湖泊相,在此基础上进一步划分为2种亚相,5种微相。通过ZTR指数分析,可知研究区物源供给主要来自于东北部方向,属于湖泊—三角洲沉积体系,为一套进积沉积序列,体现了湖盆不断充填的过程,反映了工区物源体系供给逐渐增加,湖平面不断下降以及三角洲不断向西南方向推进的沉积演化过程。

Based on the core data,analysis test data and logging data,guided by the sedimentology and high-resolution sequence stratigraphic theories,combined with previous research results,the Nen-4 member of Heidimiaooil layer in Hei-1 work area in Changling Sag,southern Songliao basin was studied.The results show that it mainly develops shallow water delta facies and lacustrine facies,which can be further divided into two subfacies and five microfacies.Through ZTR index analysis,it can be seen that the provenance supply of the study area mainly comes from the northeast,belonging to the lake-delta sedimentary system,which is a set of progradational sedimentary sequence,reflecting the process of continuous filling of the lake basin,and the sedimentary evolution process of gradual increase of provenance system supply,continuous decline of lake level and continuous advance of the delta to the southwest.