摘要
测井横波速度是测井地震联合反演的重要标定参数.为克服大量老井缺少横波速度资料和现有横波速度估算方法的不足,基于孔隙介质岩石物理理论,通过常规测井资料求取多矿物组分,利用VRH模型求得地层的等效弹性模量;最后利用纵波速度作为约束条件,根据Biot-Gassmann方程得到地层横波速度.计算结果与实测结果对比表明,平均相对误差限在5%左右,与Xu-White模型相比,该方法物理意义更为明确,使用更简便,计算精度提高一倍左右.
The shear wave velocity of well log is an important parameter for mutual inversion, but lots of wells are short of this value. As present estimation method can＇t calculate the shear velocity precisely, based on rock physics, using VRH model this paper firstly calculates the equivalent elastic modulus via multi-mineral analysis from routine well logs, and then by taking compressional velocity as a constraint, calculates the shear wave velocity based on Biot-Gassmann equations. The method has clearer physics meaning, and practice results show that this method is much more convenient, economic and precise than Xu-White methods, and the error between computational value and measured value is less than 5 percent.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
2009年第4期699-707,共9页
Earth Science-Journal of China University of Geosciences
基金
中石化“十一·五”重大科技攻关项目
