【摘要】 为预测储层油气藏,综合岩心、录井、测井、地震、分析化验资料和古生物资料,应用沉积学、层序地层学、高分辨率地层学、地球物理学等理论和方法,对松辽盆地北部西斜坡青二、三段四级层序C1水进域进行了沉积体系、沉积相和沉积微相研究.结果表明:四级层序C1水进域相当于高台子油层四砂组上半部分,分布面积较广,平面上主要有三角洲相和湖泊相;北部和西南部边界地区发育了三角洲河口坝和远砂坝微相;西北部边界地区发育了长带状滨浅湖砂坝,其他地区发育大量的滨浅湖混合滩和零星点缀其中的滨浅湖砂坝及泥滩.这些砂体夹在上覆密集段泥岩和下伏层序密集段泥岩之间,是发育地层-岩性油气藏的有利场所.更多还原

【Abstract】 To forecast hydrocarbon reservoir, studies have been carried out about the characteristics of sedimentary systems, sedimentary facies and sedimentary mocrofacies of the transgressive tract of the forth-grade sequence1 of section No.2 and section No.3 of Qingshankou Formation in the west clinoform region of north Songliao Basin. In the course of the research, we have applied synthetically the up to date theories and methods of sedimentography, sequence stratigraphy, high resolution sequences stratigraphy and geophysics, using cores, logging, well logging, seismics, analysis assay data and paleontology data. The transgressive tract of the forth-grade sequence1 corresponds to the upside part of the No.4 sand beds set of Gaotaizi reservoirs. The distribution area of the transgressive tract of the forth-grade sequence1 is relatively extended. It is mostly composed of delta facies and lacustrine facies in plane. It develops delta estuarine bar and distal end bar microfacies in its north and south-western boundary area. It develops long-zonary shore-shallow lacustrine sand bar with abundant shore-shallow lacustrine mixing beach sediment in most other area where it distributes sporadically shore-shallow lacustrine sand bar and muddy beach. These sandstone bodies are bedded in the middle of condensed sections of overlying rock and underlying sequence, which are advantaged development location of strata-lithology reservoirs.更多还原