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柴达木盆地北缘侏罗系地层沉积特征及其对含油气系统划分的意义 被引量:7

The Characteristics of Stratum and Sediments of the Jurassic System in the North of Qaidam Basin, and its significance for classification of Petroleum System.
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摘要 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。 On the basis of biostratigraphic classification ofdrills and outcrops, especially that of Lengke -1 well,authors calibrate seismic profiles, trace distributionrange of the lower and middle Jurassic, and compilesedimentary facies maps of Jurassic. Through re-search, it is clear that the north of Qaidam basin de-veloped fan-delta, semi-deep lake and deep lake faci-es at the Early-Jurassic and deposited main hydrocar-bon source rock, at middle Jurassic fluvial faciesmainly developed, the thickness and distributionrange of hydrocarbon source rock became smaller.Based on the research results of stratum, sedimentaryfacies and hydrocarbon source rock, the north of Qai-dam basin is classified to J_1 Petroleum system and J_2Petroleum system, and the next exploration directionis pointed out.
出处 《勘探家(石油与天然气)》 2000年第3期12-16,共5页
关键词 柴达木盆地 侏罗系 地层 沉积相 含油气系统划分 the north of Qaidam basin Jurassic stratum sedimentary facies hydrocarbon source rock petroleum system.
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