基于微电阻率成像测井的储集层物性及孔隙结构表征——孔隙度谱、渗透率谱及等效毛管压力曲线  

Characterization of reservoir properties and pore structure based on micro-resistivity imaging logging:Porosity spectrum,permeability spectrum,and equivalent capillary pressure curve

作　　者：田杰 王亮 司马立强[2] 方石 刘红岐 TIAN Jie;WANG Liang;SIMA Liqiang;FANG Shi;LIU Hongqi(College of Energy,Chengdu University of Technology,Chengdu 610059,China;School of Geosciences&Technology,Southwest Petroleum University,Chengdu 610500,China;PetroChina Southwest Oil and Gas Field Company,Chengdu 610000,China)

机构地区：[1]成都理工大学能源学院,成都610059 [2]西南石油大学地球科学与技术学院,成都610500 [3]中国石油西南油气田公司,成都610000

出　　处：《石油勘探与开发》2023年第3期553-561,共9页Petroleum Exploration and Development

基　　金：中国国家自然科学基金(U2003102,41974117);国家科技重大专项(2016ZX05052001)。

摘　　要：基于毛管理论,在构建微电阻率成像测井等效毛管模型的基础上,建立反映储集层非均质性的孔隙度谱(φ_(i))、渗透率谱(K_(i))和等效毛管压力曲线(p_(ci))的理论模型;为扩展理论模型的实际应用,引入阿尔奇公式建立定量表征φ_(i)、K_(i)、p_(ci)的通用模型。对比现有模型表明:(1)现有孔隙度谱模型与φ_(i)的通用模型相同;(2)相较于普塞尔(Purcell)渗透率模型,K_(i)模型能计算得到渗透率谱;(3)相较于现有的毛管压力曲线构建经验模型,p_(ci)模型具有理论基础且克服了现有模型仅基于孔隙度谱分量构建的应用局限。四川盆地川中古隆起TSX井二叠系茅口组实例应用表明,基于孔隙度谱、渗透率谱及等效毛管压力曲线可有效区分储集层类型并计算得到储集层物性及孔隙结构参数,进而有效评价储集层的非均质性。According to the capillary theory an equivalent capillary model of micro-resistivity imaging logging was built.On this basis,the theoretical models of porosity spectrum(φ_(i)),permeability spectrum(K_(i))and equivalent capillary pressure curve(p_(ci))were established to reflect the reservoir heterogeneity.To promote the application of the theoretical models,the Archie’s equation was introduced to establish a general model for quantitatively characterizingφ_(i),K_(i),and p_(ci).Compared with the existing models,it is shown that:(1)the existing porosity spectrum model is the same as the general equation ofφ_(i);(2)the K_(i)model can display the permeability spectrum as compared with Purcell’s permeability model;(3)the p_(ci)model is constructed on a theoretical basis and avoids the limitations of existing models that are built only based on the component of porosity spectrum,as compared with the empirical model of capillary pressure curve.The application in the Permian Maokou Formation of Well TSX in the Central Sichuan paleouplift shows that theφ_(i),K_(i),and p_(ci)models can be effectively applied to the identiφ_(i)cation of reservoir types,calculation of reservoir properties and pore structure parameters,and evaluation of reservoir heterogeneity.

关 键 词：微电阻率成像测井 孔隙结构 阿尔奇公式 孔隙度谱 渗透率谱 毛管压力曲线 四川盆地 二叠系茅口组 

分 类 号：P631.4[天文地球—地质矿产勘探]