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通过对博格达北麓山前凹陷内近百口井的录井、测井、地震资料和分析化验数据以及5条野外露头剖面分析,进行侏罗系地层划分对比,建立地层格架.利用ZTR指数、重矿物组合、碎屑组分、沉积构造、地层厚度及砂砾岩分布等特征,对研究区物源及古流向进行分析和判断.选取重点井取心段进行观察描述,指出主要岩相类型和沉积体系:⑴辫状河—辫状河三角洲—滨浅湖沉积体系;⑵曲流河—湖泊三角洲—滨浅湖沉积体系;⑶冲积扇(干扇、湿扇)—扇三角洲—辫状河三角洲—滨浅湖沉积体系等,建立了相应的沉积相模式,阐明骨架砂体的展布特征,预测了有利的油气聚集区.
Through the logging, logging, seismic data and analytical laboratory data of nearly 100 wells in the piedmont of Beoglu, northern Bogda, and the five outcrop profile analysis, the stratigraphic framework is established by comparing the Jurassic stratigraphy.ZTR Exponential, heavy mineral assemblages, detrital components, sedimentary structures, thickness of strata and the distribution of glutenite, the source and paleocurrent direction of the study area are analyzed and judged.The coring section of key wells is selected for observation and description, and the main lithofacies Types and sedimentary systems: ⑴ braided river - braided river delta - shallow lake sedimentary system; ⑵ meandering river - lake delta - shallow lake sedimentary system; ⑶ alluvial fan (dry fan, wet fan) - fan delta - braid River delta - shore-shallow lake sedimentary system, and so on. Corresponding sedimentary facies models have been set up to illustrate the distribution features of the skeleton sand body and to predict favorable hydrocarbon accumulation zones.