松辽盆地西部斜坡区上古生界油气地质调查进展与发现

依据近年来实施的重、磁、电、震等物探资料和地质调查井钻探成果,分析了松辽盆地西部斜坡区油气地质条件,以及上古生界目的层、盖层和基底的物性特征,阐述了研究区不同类型T5界限之下的二叠系泥页岩的发育状况、岩石组合特征及其年代地层数据。基于相关目的层泥页岩的有机质丰度、成熟度、生烃潜力和录井气测异常情况等,指出富裕-宝山地区上古生界具有油气资源前景。论文还论述了所发现的三叠纪地层及其地质意义。针对西斜坡区复杂的构造岩浆活动特征和油气调查所面临的难点与挑战,从地层学研究、地球物理方法以及建造、改造和保存条件分析等方面,探讨了深层系油气资源调查的工作方法,结合钻探中发现的稠油和氦气等资源,探索性提出“全盆地、大地质、多资源、综合调查”的新时期公益性油气地质调查工作方向。

Progresses and discoveries of geological survey on oil and gas resources related to the Upper Paleozoic in the western slope of Songliao Basin

Based on the data of gravity-magnetic-electric-seismic geophysical survey and geological drilling results of geological survey wells in recent years, the geological conditions and geophysical properties of the target strata, overlying strata and its basement of the Upper Paleozoic are analyzed in the western slope of Songliao Basin. Characteristics of occurrence, rock assemblage and strata chronology of shale and mudstone related to the Permian under different types of T5 boundary of the study area are described. On the evaluation of TOC, T_max, hydrocarbon generation potential and well logging data, Fuyu and Baoshan strict is realized to be the potential area of the target strata. The authors also discussed Triassic strata and its geological significance. The methods, which is focus on the difficulties and challenges about deep strata survey, is discussed on the respect of stratigraphy research, geophysical investigation, and the analysis of construction, deformation and reservation about the western slope with complexed structure and magma activities. Considering about the discovery of the heavy oil and helium, the idea of comprehensive survey on the total Basin, Huge geology, multi energy are suggested on the new era of commonweal oil and gas geological survey.