阿姆河右岸生物礁滩储层的横波速度预测方法

为提高阿姆河右岸生物礁滩储层叠前弹性参数反演的精度和可靠性,采用岩石物理测试分析的纵、横波速度的关系式估算小孔隙度储层的横波速度,采用基于基质矿物等效体积模量反演方法、碳酸盐岩孔隙结构反演方法和Xu-White模型方法估算中、大孔隙度储层的横波速度。用该方法计算的横波速度结果与没有考虑该区孔隙结构的计算方法结果对比,精度明显提高,并且和实际测井的横波速度曲线也更加吻合。根据阿姆河右岸生物礁储层的特点,对储层孔隙结构分类采用不同的横波预测方法,更适合于该区的生物礁滩储层反演和油气预测。

S-wave velocity estimation of biological shoal reservoir on right bank of Amudarya

In order to improve the pre-stack elastic inverse accuracy and reliability in the biological reef reservoir from the Amudarya right bank,this paper discusses a method for S-wave velocity estimation in this reservoir.The method uses the relation between P-wave velocity and S-wave velocity to estimate the S-wave velocity from the small porosity reservoir.The relation is obtained from the petro-physics test and analysis.Then,the S-wave velocity from the medium and large porosity reservoir is calculated by the methods based on the equivalent bulk modulus inversion of the matrix mineral,the pore structure inversion of carbonate rocks and the Xu-White model.Compared with the other methods to calculate S-wave velocity without considering the pore structure of this area,this method for the calculation of the shear wave velocity is more accuracy,and the result is in accordance with the S-wave velocity from the actual logging data.According to the characteristics of the biological reef reservoir from the Amudarya right bank and by using different shear velocity prediction methods to classify the reservoir pore structure are more suitable for the inversion of the biological reef reservoir and the prediction of oil and gas in this area.