饱和度方程一般形式的理论内涵及应用实践  

Theoretical connotation and application of general form of saturation equation

作　　者：李宁[1] 王克文[1] 武宏亮[1] 冯周[1] 田瀚[1] LI Ning;WANG Kewen;WU Hongliang;FENG Zhou;TIAN Han(Research Institute of Petroleum Exploration and Development,PetroChina,Beijing 100083,China)

机构地区：[1]中国石油勘探开发研究院,北京100083

出　　处：《中国石油大学学报（自然科学版）》2023年第5期38-44,共7页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：中国石油天然气集团公司“十四五”测井基础前沿研究项目(2022DJ3908)。

摘　　要：首次将电阻增大率-含油(气)饱和度方程一般形式的不同截短方式形成的矩阵视为一种“周期表”。通过研究纯砂岩、泥质砂岩及典型火山岩、碳酸盐岩储层饱和度方程在矩阵中的分布发现特定的周期变化规律,即当储层导电呈并联模式时其饱和度模型最优截短方式沿周期表的横向作规律性变化;当储层导电呈串联模式时其饱和度模型最优截短方式沿周期表的纵向作规律性变化;当储层导电呈串并联混合模式时其饱和度模型最优截短方式沿周期表的对角线方向作规律性变化。这一周期表可以用来预测不同储层饱和度方程最优截短形式,尤其是对复杂储层饱和度模型的准确确定意义重大,现已在各类复杂储层评价中实际应用。本文中仅以电性受多种因素影响的缝洞型碳酸盐岩和天然气水合物这两类典型储层饱和度模型的确定为例予以说明。For the first time,the different truncation matrix of the general form between the resistivity index and oil or gas saturation equation is regarded as"a periodic table".By studying the distribution of saturation equations in the matrix of pure sandstone,shaly sandstone,and typical volcanic,carbonate reservoirs,it was found that it follows a specific periodic variation,that is,when the conductivity of the reservoir is in parallel mode,the optimal truncation form of the saturation model changes along the lateral pattern of the periodic table;When the conductivity of the reservoir is in a series mode,the optimal truncation form of the saturation model changes along the longitudinal pattern of the periodic table;When the conductivity of the reservoir is in a series-parallel mixed mode,the optimal truncation form of the saturation model changes along the diagonal direction of the periodic table.Therefore,this periodic table can predict the optimal truncation form of saturation equations for different reservoirs,especially for the accurate determination of complex reservoir saturation models,which is of great significance.This periodic table has been applied in various complex reservoir evaluations.This article takes the determination of saturation models for fractured carbonate rocks and natural gas hydrates,which are influenced by multiple factors in terms of electrical properties,as examples to illustrate.

关 键 词：饱和度模型 通解方程 影响因素 截短形式 周期表 

分 类 号：TE122[石油与天然气工程—油气勘探]