松辽盆地南部西斜坡层序地层与油气聚集规律

SEQUENCE STRATIGRAPHY AND OIL—GAS ACCUMULATION REGULAR PATTERN AROUND THE WESTERN SLOPE IN SOUTHERN SONGLIAO BASIN

郭少斌

Guo Shaobin

长春地质学院, 130061

Changchun University of Earth Sciences, Changchun, 130061

本文在全面了解陆相层序地层学研究现状的基础上,以松辽盆地南部西部斜坡(以下简称松南西斜坡)为例,提出了在一个完整的水平面升降旋回,可形成低水位、湖泊扩张、高水位、湖泊萎缩4个体系域。而不完整旋回,体系域在时空演化上呈低水位、湖泊扩张、高水位配置或湖泊扩张、高水位、湖泊萎缩3个体系域配置,进而总结了松南西斜坡油气聚集规律。

Based on the detailed study on the current situation of non-marine sequence stratigraphy research,theauthor proposed a complete uprising-depressing cycle on a horizontal plane that can form four systemtracts,i.e.lowstand,lake extension,highstand,and lake contraction system tracts,with the western slopein the southern sector of Songliao basin(WSSB)taken as an example.As for an incomplete cycle,the temporal and spatial evolution of the system tracts is expressed as lowstand,lake extension,and highstand or aslake extension,highstand and lake contraction system tracts.Finally,the oil-gas accumulation patternaround the southwest slope of Songliao Basin is concluded.

https://doi.org/10.11781/sysydz199704340