古地理学报2016，Vol.18Issue(4)：535-544,10.DOI:10.7605/gdlxb.2016.04.039
沉积和成岩因素对碎屑岩储集层质量贡献率的定量分析方法--单因素比较法
Contribution of sedimentary and diagenetic factors to clastic reservoir quality:Quantitative determination by single factor comparison method
摘要
Abstract
Quality of clastic reservoirs refers to permeability and porosity.Factors controlling reservoir quality are mainly sedimentary and diagenetic.Sedimentary factors include grain size,rounding,sorting and content of clay matrix.Diagenetic factors include compaction degree,content of dissolution pores, type and content of cements.The reservoir quality of a sandstone is commonly controlled by many factors, and the key to determine major controlling factors is to find out quantitative contribution of each factor.In this paper,a method to analyze quantitative contribution of sedimentary and diagenetic factors to reservoir quality—the single factor comparison method—is proposed out,and is applied to the sandstone reservoirs in the Dongying Formation of Paleogene in the Bozhong sag.There are two types of sandstones in the Dongying Formation,distributary channel sandstone and mouth bar sandstone of deltaic facies,and their permeability differs greatly.Quantitative contribution rate of each factor to the reservoir quality difference is calculated,and major controlling factor is determined:Contribution rate of clay matrix content is 78.5%, indicating clay matrix content is the major controlling factor;that of grain size is 2.7%,that of sorting co-efficient is 1 .5%;that of authigenic clay mineral content is 1 5.9%,that of carbonate cement content is 2.3%,that of dissolution pore content is 1 .5%,that of compaction degree is 1 .7%.Comprehensive con-tribution rate of sedimentary factors is the sum of each sedimentary factor's contribution rate,i.e.,82.7%;comprehensive contribution rate of diagenetic factors is the sum of each diagenetic factor's contribution rate,i.e.,1 8.4% (the rate of dissolution pore is -1 .5% because of its reverse influence).Thus,sedi-mentary factors are major factors resulting in great difference in permeability between channel sandstone and mouth bar sandstone in this area.关键词
储集层质量/主控因素/单因素比较法/古近系/东营组/渤中凹陷Key words
reservoir quality/controlling factors/single factor comparison method/Paleogene/Dongying Formation/Bozhong sag分类
能源科技引用本文复制引用
金振奎,石良,闫伟,朱小二,彭飚..沉积和成岩因素对碎屑岩储集层质量贡献率的定量分析方法--单因素比较法[J].古地理学报,2016,18(4):535-544,10.基金项目
国家重大科技专项“油气勘探领域储集层地质与油气评价”（编号2009ZX05009－002）项目资助。［Financially suppored by National Science and Technology Major Projects of “Reservoir geology and oil and gas evaluation in the field of oil and gas exploration”（No.2009ZX05009－002）］ （）
