姬塬油田G19井区长2储层成岩作用及其对物性的影响

Diagenesis of Chang 2 Reservoir in G19 Well of Jiyuan Oilfield and Its Influence on Physical Properties

基于钻井、测井、岩心分析测试等资料,研究姬塬油田长2储层的岩石学特征、成岩作用,并讨论了成岩作用对储层物性的影响。在研究区长2储集层中,大部分砂岩均为长石砂岩,含少量岩屑砂岩;胶结物的主要成分为高岭石、绿泥石、方解石等。长2储层经历了多种成岩作用,其中压实和胶结作用是主要的破坏性成岩作用,溶解作用是主要的建设性成岩作用。

Based on the data of drilling,logging and core analysis,this paper studies the petrological characteristics and diagenesis of Chang 2 reservoir in Jiyuan Oilfield,and discusses the influence o f diagenesis on reservoir physical properties.In Chang 2 reservoir in the study area,most of the sandstones are feldspar sandstone,containing a small amount o f lithic sandstone.The main components of cement are kaolinite,chlorite,calcite,etc.Chang 2 reservoir has experienced various diagenesis,among which compaction and cementation are the main destructive diagenesis and dissolution is the main constructive diagenesis.