胡力海洼陷高分辨率层序地层对比

High resolution sequence stratigraphic correlation in Hulihai Subsag,Liaohe Oilfield

胡力海洼陷为辽河油田外围洼陷,勘探程度较低。根据陆相盆地高分辨率层序地层学原理,综合利用岩心、测井及地震等资料,对辽河油田胡力海洼陷九佛堂组和沙海组进行了层序界面识别和多级次高分辨率层序地层对比。将九佛堂组划分为2个中期旋回和6个短期旋回,将沙海组划分为3个中期旋回。依据等时地层对比法,对旋回层序进行了连井对比,建立了该区高精度等时地层格架,为下一步的勘探开发提供了科学依据。

Hulihai Subsag is peripheral depression of Liaohe Oilfield,with low degree of exploration.Under the guidance of the theory of high resolution sequences stratigraphy,combined with comprehensive analysis of rock cores,well logs and seismic data,the stratigraphic sequence correlation of Jiufotang Formation and Shahai Formation of Hulihai Subsag was carried out.Jiufotang Formation was divided into two middle-term cyclic sequences and six short-term cyclic sequences,while Shahai Formation was divided into three middle-term cyclic sequences.Based on isochronous stratigraphic correlation method,the well-tie section was correlated,and the isochronous stratigraphic frameworks were established.