渤海湾盆地石臼坨凸起东缘混积岩储层特征及物性主控因素

发布时间：2018-05-28 14:28

本文选题：混积岩 + 陆源碎屑岩　；参考：《油气地质与采收率》2017年03期

【摘要】：混积岩储层是渤海湾盆地石臼坨凸起沙河街组油气勘探开发的重要储集体,但目前对混积岩沉积特征和储层特征的系统性研究仍较少。为此,分析钻井岩心、铸体薄片、测井及测试等资料,认为石臼坨凸起东缘发育的混积岩是陆源碎屑岩与碳酸盐岩的混合沉积岩,其岩相主要包括含内碎屑细砂岩、含生物碎屑中—细砂岩、含生物碎屑砾岩、砂质生物碎屑云岩、含砂质生物内碎屑泥晶云岩和含砂质生物碎屑云岩。分析储层物性特征及成岩作用可知,发育在半封闭—封闭湖湾的混合生物碎屑滩储层物性最好,扇三角洲前缘的生物碎屑砂质滩和生物碎屑砾质滩储层物性次之。储层物性主要受岩相、沉积相、压实作用、胶结作用和溶蚀作用等因素控制,其中岩相和沉积相是形成优质储层的先决条件,由于压实作用被抑制,因此对储层物性的影响减小,而胶结作用、溶蚀作用等后期成岩作用对储层物性的控制作用更为重要。
[Abstract]:Migmatite reservoir is an important reservoir in oil and gas exploration and development of Shiyutuo uplift Shahejie formation in Bohai Bay basin, but there are few systematic studies on sedimentary characteristics and reservoir characteristics of migmatite at present. Therefore, by analyzing the data of drilling core, casting thin slice, logging and testing, it is concluded that the migmatite developed in the eastern margin of the Shigutuo uplift is a mixed sedimentary rock of continental clastic rock and carbonate rock, and its lithofacies mainly include inner clastic fine sandstone. Bio-clastic medium-fine sandstone, bioclastic conglomerate, sandy biologic clastic dolomite, sand-bearing bioclastic mudstone and sandy biologic clastic dolomite. According to the analysis of reservoir physical properties and diagenesis, the reservoir physical properties of mixed bioclastic beach developed in semi-closed and closed lake bay is the best, followed by the bioclastic sandy beach and bioclastic gravelly beach reservoir in the front of fan delta. Reservoir physical properties are mainly controlled by lithofacies, sedimentary facies, compaction, cementation and dissolution, among which lithofacies and sedimentary facies are prerequisites for the formation of high quality reservoirs. Therefore, the influence on reservoir physical properties is reduced, while the later diagenesis, such as cementation and dissolution, is more important to the control of reservoir physical properties.
【作者单位】：中国地质大学(武汉)资源学院;中海石油(中国)有限公司天津分公司;
【基金】：国家自然科学基金青年科学基金项目“南海北部深水区台缘结构与生物礁生长模型”(41202086)
【分类号】：P618.13

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