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依据钻井、露头的生物地层研究成果,特别是以冷科1井的生物地层划分为基础,笔者标定了地震剖面,追踪出了中、下侏罗统的分布范围及厚度,并编制了早、中株罗世沉积相平面图。其研究结果表明,早侏罗世,该区发育扇三角洲与半深湖—深湖为主的沉积体系组合,沉积了北缘地区主要的烃源岩层;中侏罗世,该区广泛发育冲积平原沉积,仅在大煤沟组第七段沉积期有钱湖—半深湖沉积,烃源岩厚度及分布范围变小。在地层、沉积及烃源岩的研究基础上,划分了J_1含油气系统和J_2含油气系统,指出了该区的下步勘探方向。
Based on the research results of drilling and outcrop bio-strata, especially based on the bio-stratigraphic division of Lengke-1 well, the author calibrated the seismic profile and traced the distribution range and thickness of middle and lower Jurassic. Middle line of Rosh Sediment facies plan. The results show that in the early Jurassic, there was a combination of sedimentary systems dominated by fan delta and semi-deep lake-deep lake, and the main source rocks in the northern margin were deposited. During the Middle Jurassic, the alluvium The sediments of the plain are only rich in lake-semi-deep lacustrine sediments during the deposition period of the seventh member of Dayitougou Formation, and the thickness and distribution range of source rocks become smaller. Based on the study of the strata, sediments and source rocks, the J_1 petroleum system and the J_2 petroleum system are divided, and the direction of further exploration is pointed out.