利用激发极化驰豫时间谱确定渗透率的实验研究  

Research on determining permeability with induced polarization relaxation spectra

作　　者：童茂松[1] 王伟男[2] 范清华[2] 姜亦忠[2] 王荣[2] 杜国同[1] 

机构地区：[1]吉林大学电子科学与工程学院,吉林长春130023 [2]大庆石油管理局测井公司研发中心,黑龙江大庆163412

出　　处：《吉林大学学报（地球科学版）》2004年第4期625-629,共5页Journal of Jilin University：Earth Science Edition

基　　金：大庆油田博士后科研攻关课题和大庆石油管理局重大科研项目(DQKJ2B200318)

摘　　要：激发极化驰豫时间是孔隙大小的函数,采用奇异值分解方法对激发极化衰减曲线进行多指数反演,得到光滑的驰豫时间谱,该谱呈现多峰特性。实验结果表明,溶质对该谱的影响主要是由于溶质离子的扩散系数不同所致。对于同一块岩心,衰减谱随扩散系数的增大而向小驰豫时间方向移动。结合岩心地层因素F,研究了激发极化驰豫时间几何平均值Tg与岩石的渗透率K的关系,结果表明,logK和log(T1/2g/F)、log(Tg/F)呈现良好的线性关系。Induced polarization relaxation is a function of pore size. The singular value decomposition algorithm is used to inverse the induced polarization multi-relaxation data of rock samples. The relaxation spectrum is smoothly and shows a multi-peak shape. The influence of electrolytes on the spectra results from difference of diffusion constants. Spectra shift left with increasing the constant. In addition, the relationship between relaxation spectra and permeability is also investigated by combining the core porosity, permeability and formation factor. The results show that IP relaxation related to the reservoir permeability logK has linear relationship to log(T^(1/2 )_g/ F) and log(T_(g) /F).

关 键 词：激发极化测井 驰豫时间谱 渗透率 

分 类 号：P631.8[天文地球—地质矿产勘探]