摘要:
通过钻井、测井、古生物等资料的综合分析,应用陆相层序地层学理论对卫城油田卫81断块沙四段进行高分辨率层序地层学研究.依据岩性、构造、古生物、测井等标志将沙四段划分出1个三级层序,2个体系域、4个准层序组和18个准层序.其中,沙四下段为低水位体系域,主要发育洪水-漫湖沉积体系;沙四上段为湖侵体系域,主要发育湖泊三角洲沉积体系.烃源岩为沙四上段的暗色泥岩,储集层为沙四上段的湖泊三角洲砂体和沙四下段的洪水流砂体.
Abstract:
Based on the systematical analysis of drilling, logging data and palaeontology, using continental facies sequence stratigraphy, the high resolution stratig raphic sequence of Sha-4 member in Wai-81 f ault block, Weicheng oil field, was studied. On the basis of the lithological characteristics, tectonic evolution, palaeontology and logging, the Sha-4 member was divided into: 1 three order sequence, 2 systemt racts, 4 parasequencesets, 18 parasequence. The lower Sha-4 member consists of lowstand system tract which mainly developed flood flow depositionract, and upper Sha-4 member consists of trangressive system tract which mainly developed delta deposition tract. The source rocks are the dark grey mudstone of the upper Sha-4 member, and the reservoir is lake delta facies from upper Sha-4 and f lood flow deposition tract from lower Sha-4 member.
百度学术
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