摘要
砾岩储层岩性复杂,电阻率测井响应受岩石骨架和孔隙结构影响严重。建立各向异性砾岩地层模型,研究恒定电场中砾岩地层电阻率的三维数值计算方法及复杂砾岩地层模型网格剖分方法,分析各向异性砾岩地层中的电流分布,揭示了砾岩地层电阻率与孔隙度和孔隙形状的关系,给出了由地层因素和孔隙度数值拟合后确定各向异性砾岩地层岩性参数的方法,为砾岩油藏的评价和解释提供依据,扩展对各向异性的认识。
For conglomerate reservoir,the lithology is complex and the resistivity log response is influenced by rock skeleton and pore structure.This paper presents several conglomerate formation numerical models and the grid dividing method of complex conglomerate formation model.The three-dimensional numerical simulation method for calculating the conglomerate formation resistivity based on the constant electric field theory is described and the current distribution in anisotropic conglomerate formation is revealed. We analyze the influence of porosity and pore shape on the conglomerate formation resistivity,and calculate the lithology parameters by data fitting method based on formation factor and porosity.The above results provide the theoretical foundation for evaluation and interpretation of conglomerate reservoir,so expanding the understanding of anisotropy.
出处
《测井技术》
CAS
CSCD
2015年第6期693-697,共5页
Well Logging Technology
基金
国家科技重大专项(2011ZX05020-004-05)
陕西省教育厅专项科研计划项目(11jk0783)
关键词
岩石物理研究
砾岩
孔隙度
孔隙形状
恒定电场
数值拟合
petrophysical study
conglomerate
porosity
pore shape
constant electric field
data fitting
