湖相凝缩层的发现与岩性油气藏预测——以哈萨克斯坦南图尔盖盆地S油田为例

发布时间：2018-03-16 05:37

本文选题：南图尔盖盆地　切入点：上侏罗统　出处：《新疆石油地质》2017年04期 　论文类型：期刊论文

【摘要】：在研究哈萨克斯坦南图尔盖盆地S油田上侏罗统阿克沙布拉克组的沉积特征中,发现了一套几乎在整个油田都有分布的具有高自然伽马、低电阻率等电性特征的泥岩层。应用层序地层学观点综合分析这套泥岩层后确认,它是一套最大湖泛期沉积的凝缩层。根据凝缩层的横向分布特征、结合地质及地震资料,提出了地层的沉积模式。分析凝缩层之上阿克沙布拉克组J0-0砂层组沉积特征认为,在S油田东部斜坡位置J0-0砂层组沉积厚度变化大,这是由于在构造的高水位时期发育进积型三角洲,其三角洲前缘位置是最有利的地层-岩性油气藏发育区,并在S53井和S34井中得到了很好的验证。给出了寻找湖相凝缩层的方法,为寻找地层-岩性油气藏提供了一种新思路。
[Abstract]:In studying the sedimentary characteristics of the Upper Jurassic Akshabrak formation in S Oilfield of South Turgai Basin, Kazakhstan, we found a set of highly natural gamma-rays distributed almost throughout the oil field. Mudstone with low resistivity and other electrical characteristics. It is confirmed by synthetically analyzing this set of mudstone layers from the viewpoint of sequence stratigraphy that it is a set of condensed beds deposited in the largest lake flooding period. According to the transverse distribution characteristics of condensed beds, combined with geological and seismic data, The sedimentary characteristics of the J0-0 sand formation in the Akshabrak formation above the condensed layer are analyzed. It is considered that the thickness of the J0-0 sand formation varies greatly in the eastern slope of S oil field. This is due to the progradation delta developed during the period of high water level of the structure, and the delta front position is the most favorable stratigraphic-lithologic reservoir development area. Well S53 and well S34 are well verified. The method of finding condensed layer of lacustrine facies is given, which provides a new way for finding stratigraphic lithologic reservoirs.
【作者单位】：中国石油长城钻探工程有限公司解释研究中心;
【分类号】：P618.13

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