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根据野外露头、钻井岩心、测井和地震资料,建立松辽盆地各级层序的识别标志和层序地层格架,将松辽盆地地层划分为白垩纪裂谷盆地巨层序和第三纪裂谷盆地巨层序,并将白垩纪裂谷盆地巨层序进一步划分为3个超层序组,7个超层序和19个层序。松辽盆地构造演化经历了断陷期、坳陷期和萎缩期3个阶段,断陷湖盆与坳陷湖盆成因机制不同。因此,层序地层内部特征及充填序列有较大差别。通过对层序地层格架内各体系域生储盖层发育特征、组合规律和油气聚集规律研究认为:水退体系域是储集砂体最发育、油气资源量最多的层段,其次为低水位和水进体系域,高水位体系域含油气较差。
Based on the outcrops, drilling cores, logging and seismic data, the identification marks and sequence stratigraphic frameworks of the Songliao Basin at all levels are established. The strata of the Songliao Basin are divided into the Cretaceous rift basins and the Tertiary In the rift basin, the macro-sequence was divided into three super-sequence sequences, seven super-sequences and 19 sequences. The tectonic evolution of the Songliao basin underwent three stages of fault depression, depression and atrophy. The genesis mechanism of the faulted lake basin and the depression lake basin are different. Therefore, the internal characteristics of sequence stratigraphy and filling sequence are quite different. Based on the study of the development characteristics, assemblage law and hydrocarbon accumulation law of each reservoir system in the sequence stratigraphic framework, it is concluded that the water system is the most developed reservoir with the most oil and gas resources, followed by low Water level and water into the system tract, high water system tract containing oil and gas worse.