王勇,唐军,李显路,邓佩,万力,郭欢欢
Wang Yong,Tang Jun,Li Xianlu,Deng Pei,Wan Li,Guo Huanhuan

• 1:中国石化河南油田分公司
• 2:长江大学地球物理与石油资源学院
• 3:中国石化河南油田分公司勘探开发研究院

摘要(Abstract)：

致密砂岩储层的微观孔隙类型、分布形态较高孔储层更加复杂，使得储层岩石声电物理响应规律认识不清。利用现有孔隙度、渗透率的储层分类方案，提出了一种基于孔隙结构特征的储层有效性评价方法：首先通过岩心观察，分析致密砂岩与常规砂岩在孔隙结构上的差异，明确孔隙结构量化表征参数，归纳室内实验测量方法的优缺点；然后在讨论井下核磁共振法测量孔隙结构的局限后，重点研究基于电阻率测井曲线表征致密砂岩孔隙结构的方法；最后通过岩石物理导电模型和毛细管束模型分别建立适合致密砂岩的孔隙结构的表征参数。该方法在河南油田A区块致密砂岩储层的应用结果表明，由该方法构建的孔喉半径-导电效率-渗透率储层分类方案（简称R-E-P）能将原本无法区分等级的4类储层进行有效区分。研究成果对致密砂岩储层评价具有积极的推广价值。
The microscopic pore types and distribution patterns in tight sandstone reservoirs are more complex than those in high-porosity reservoirs,leading to an unclear understanding of the acoustic and electrical physical response laws of reservoir rocks. Using existing reservoir classification schemes based on porosity and permeability,a reservoir effectiveness evaluation method based on pore structure characteristics is proposed. First,through core observation,the differences in pore structure between tight sandstone and conventional sandstone are analyzed,clarifying the quantitative characterization parameters of pore structure and summarizing the advantages and disadvantages of laboratory measurement methods. Then,after discussing the limitations of downhole nuclear magnetic resonance methods for measuring pore structure,the focus shifts to methods for characterizing tight sandstone pore structure based on resistivity logging curves. Finally,characterization parameters suitable for tight sandstone pore structure are established by using rock physical conductivity models and capillary bundle models, respectively. The application results of this method in tight sandstone reservoirs of Block A in He'nan Oilfield indicate that,the reservoir classification scheme of pore throat radius-conductivity efficiency-permeability(R-E-P)constructed by this method can effectively differentiate 4 types of reservoirs which are originally indistinguishable. The research provides positive promotion value for the evaluation of tight sandstone reservoirs.

关键词(KeyWords)： 致密砂岩;孔隙结构;岩石物理;储层有效性;导电效率;孔喉半径
tight sandstone;pore structure;rock physical;reservoir effectiveness;conductive efficiency;pore-throat radius

Abstract:

Keywords:

基金项目(Foundation): 中国高校产学研创新基金项目“岩石物理虚拟实验教学设计与实践”（2023YC0062）

作者(Author): 王勇,唐军,李显路,邓佩,万力,郭欢欢
Wang Yong,Tang Jun,Li Xianlu,Deng Pei,Wan Li,Guo Huanhuan

DOI: 10.19597/J.ISSN.1000-3754.202512014

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