鄂尔多斯盆地奥陶系颗粒滩白云岩储层特征及主控因素

发布时间：2018-02-26 13:33

本文关键词： 鄂尔多斯盆地颗粒滩白云岩储层储层成因岩溶裂缝　出处：《海相油气地质》2017年02期 　论文类型：期刊论文

【摘要】：基于岩心观察、薄片鉴定、物性分析和地球化学分析,结合岩相古地理研究,认为鄂尔多斯盆地中东部奥陶系盐下发育三套颗粒滩白云岩储层,分别为下奥陶统马家沟组马二段、马四段和马五_(7+9)亚段。马二段颗粒滩环台内洼地分布,马四段和马五_(7+9)亚段颗粒滩环台内洼地以及滩间次级洼地两侧的相对隆起带分布。白云岩储集空间类型主要为粒间孔、晶间(溶)孔、溶蚀孔洞和裂缝。三维CT分析表明,白云岩储层具有优良的储渗性能。颗粒滩白云岩主要为浅埋藏蒸发海水渗透回流交代成因。白云岩储层的发育主要受控于三个因素:层序格架控制的颗粒滩分布,表生岩溶作用,构造裂缝系统。
[Abstract]:Based on core observation, thin section identification, physical property analysis and geochemical analysis, combined with lithofacies and paleogeography, it is considered that three sets of granular beach dolomite reservoirs are developed under the salt of Ordovician in the central and eastern part of Ordos Basin. The lower Ordovician Majiagou formation is submember Maer 2, Ma Si formation and Ma Wu Jiao 79). The distribution of relative uplift zones on both sides of the submember granular beach ring platform and between the sub-depressions. The reservoir space types of dolomite are mainly intergranular pore, intergranular (dissolved) pore, solution pore and fracture. Three-dimensional CT analysis shows that the distribution of the relative uplift zone on the two sides of the sub-depression of the granular beach is mainly intergranular pore, intergranular (dissolved) pore, dissolved pore and fracture. The dolomite reservoir has excellent reservoir and permeability performance. The grain beach dolomite is mainly formed by shallow buried evaporative seawater permeation and reflux metasomatism. The development of dolomite reservoir is mainly controlled by three factors: the distribution of grain beach controlled by sequence framework. Supergene karstification, structural fracture system.
【作者单位】：中国石油杭州地质研究院;中国石油天然气集团公司碳酸盐岩储层重点实验室;中国石油大学(北京);
【基金】：国家科技重大专项“大型油气田及煤层气开发”(编号:2016ZX05004-002) 中国石油集团科技重大专项“深层油气勘探开发关键技术研究”(编号:2014E-32-02)联合资助
【分类号】：P618.13

【相似文献】