微生物白云岩储集层特征、成因和分布——以四川盆地震旦系灯影组四段为例

发布时间：2018-03-16 08:36

本文选题：四川盆地　切入点：震旦系　出处：《石油勘探与开发》2017年05期 　论文类型：期刊论文

【摘要】：基于岩心和薄片观察、单井资料及地球化学分析结果,剖析四川盆地震旦系灯影组四段(简称灯四段)储集层特征、成因和分布。微生物白云岩为灯四段主力储集层,球形白云石的发现揭示白云石化与微生物作用有关,属早期低温沉淀的原白云石;原生基质孔和准同生溶蚀孔洞构成储集空间的主体,而不是前人所认为的与桐湾运动相关的层间岩溶作用及埋藏-热液溶蚀作用成因。微生物丘滩复合体和准同生溶蚀作用是灯四段储集层规模发育和分布的主控因素。台内裂陷周缘的微生物白云岩储集层厚度大、连续性好、品质优,是重要的勘探对象。
[Abstract]:Based on the observation of core and thin slice, single well data and geochemical analysis, the reservoir characteristics, origin and distribution of the fourth member of the Dengying formation of the Sinian system in Sichuan Basin are analyzed. The microbe dolomite is the main reservoir of the fourth member. The discovery of spherical dolomite reveals that dolomitization is related to microbial action and belongs to the proto-dolomite precipitated at low temperature in the early stage, and the primary matrix pore and quasi-synchrogenic solution pore constitute the main body of the reservoir space. It is not the interlaminar karstification related to Tongwan movement and the origin of burial hydrothermal dissolution, which is considered by predecessors. The microorganism mound complex and quasi-synchrogenic dissolution are the main controlling factors for the development and distribution of reservoir size in the fourth member of the Changliang formation. The microbe dolomite reservoir around the rift in the platform is very thick. The continuity is good, the quality is excellent, is the important exploration object.
【作者单位】：中国石油杭州地质研究院;中国石油集团碳酸盐岩储集层重点实验室;
【基金】：国家科技重大专项“大型油气田及煤层气开发”(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”(2014E-32-02)
【分类号】：P618.13

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