高含盐油藏水驱储层参数变化机理及规律研究  

Law and mechanism of parameters change in saliferous reservoir

作　　者：尤启东[1] 周方喜[1] 张建良[1] 陈月明[2] 

机构地区：[1]江苏石油勘探局,江苏扬州225009 [2]中国石油大学石油工程学院,山东东营257061

出　　处：《中国石油大学学报（自然科学版）》2007年第2期79-82,共4页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家'973'重点发展规划项目(G1999022508);中石化基金项目(P03056)

摘　　要：通过岩心驱替以及砂岩微观孔隙模型驱替实验,研究了高含盐油藏水驱储层参数变化机理和规律。运用先进的支持向量机方法对驱替实验结果进行处理,完成了储层渗透率变化规律的定量描述。研究结果表明,高含盐油藏储层参数变化呈多元非线性函数关系,变化规律复杂;渗透率变化存在临界值,大于临界值时,渗透率随着驱替速度、驱替量和含盐量的增加而增大,小于临界值时,渗透率随着驱替速度、驱替量和含盐量的增加而减小;注入水性质会对参数变化过程有影响,而对最终变化结果无影响;盐的溶解是储层参数变化的根本原因,岩石颗粒的脱落和运移是储层参数变化的直接原因。By performing core displacement and micro pore model displacement experiments, the mechanism and changing law of saliferous reservoir parameters were studied. The changing law of reservoir permeability was quantitatively described with the advanced method of support vector machine （ SVM ）. The result shows that the changing law of saliferous reservoir parameters is a nonlinear relationship with several variables, and it is a very complicated process. There exists a critical value of permeability during the process of parameters change. With the displacement rate, pore volume of displacement and sa- linity increasing, the permeability increases when the permeability is larger than the critical value of permeability, and the permeability decreases when the permeability is smaller than the critical value of permeability. The quality of injection water has effect on the process of parameters change, and the final result is not affected. The dissolution of salt is the essential factors resulting in the change of reservoir parameters. The dissolution of dissoluble salt, existing as cementation, leads to the escape and migration of sand particulates, which is the direct reason leading to the change of reservoir parameters.

关 键 词：高含盐油藏 储层参数 微观孔隙模型 支持向量机 微粒运移 

分 类 号：TE312[石油与天然气工程—油气田开发工程]