应用可变T_2截止值确定束缚水饱和度  

Application of Variable T_2 Cutoff Value to Determine Irreducible Water Saturation

作　　者：苏俊磊[1] 王艳[2] 孙建孟[1] 

机构地区：[1]中国石油大学地球资源与信息学院,山东东营257061 [2]大庆石油管理局测井公司,黑龙江大庆163412

出　　处：《吉林大学学报（地球科学版）》2010年第6期1491-1495,1520,共6页Journal of Jilin University：Earth Science Edition

基　　金：国家'863'计划项目(2006AA060105)

摘　　要：为了得到准确的束缚水饱和度数据,以T2截止值模型为基础,分别用基于经验固定T2截止值、经验可变T2截止值及渗透率Coates模型的可变T2截止值3种方法确定束缚水饱和度,利用常规岩心分析实验数据验证其计算精度。结果表明,基于渗透率Coates模型的可变T2截止值计算核磁束缚水饱和度精度最高,与常规岩心分析束缚水饱和度平均相对误差为9.5%,而且此方法可确定Coates模型中的地区经验系数C、m、n,提高了核磁渗透率的计算精度。Based on T2 cutoff value model,to determine the irreducible water saturation we used three kinds of variable T2 cutoff value method,a fixed cutoff value of experience,experience variable T2 cutoff value,and the Coates permeability model,and comparative analysis has been done in order to get accurate result.Additionally,experimental data with conventional core analysis verified the accuracy.The results indicated that the average relative error between the irreducible water saturation computed by variable T2 cutoff value based on Coates permeability model and irreducible water saturation got by conventional core analysis is 9.5%.Additionally this method can be used to determine Coates model of regional experience in the coefficient of C,m,n and improve the accuracy of NMR permeability.

关 键 词：核磁共振测井 葡萄花油组 T2截止值 束缚水饱和度 

分 类 号：P631.8[天文地球—地质矿产勘探]