CAJ | 학술논문

横波速度是进行叠前参数反演的必要条件,因此,横波速度的精度会直接影响叠前反演结果的精度。获取横波速度信息的方法较多,但适用条件差异较大。在准确求取目的层段各岩石矿物成分的基础上,首先利用已知的矿物弹性模量、纵横波速度区间及多种岩石物理模型来获取纵横波速度,再通过对多个模型拟合结果的对比,优选出了适合于苏里格气田砂泥岩地层的横波速度拟合模型。实际应用结果表明,该方法提高了合成横波速度的精度。
횡파속도시진행첩전삼수반연적필요조건,인차,횡파속도적정도회직접영향첩전반연결과적정도。획취횡파속도신식적방법교다,단괄용조건차이교대。재준학구취목적층단각암석광물성분적기출상,수선이용이지적광물탄성모량、종횡파속도구간급다충암석물리모형래획취종횡파속도,재통과대다개모형의합결과적대비,우선출료괄합우소리격기전사니암지층적횡파속도의합모형。실제응용결과표명,해방법제고료합성횡파속도적정도。
Shear wave velocity is the necessary condition for prestack inversion,so it can directly affect the result of prestack inversion.There are manymeans to get shear wave velocity,of which the applicable conditions deviated a lot.Based on the rock mineral composition of target zone,the elastic modulus,S-wave and P-wae velocity interval and several rock physical models were applied to obtain the S-wave and P-wae velocity.According to the comparison of model fitting results,we optimized the S-wave fitting model suitable for sand shale formation in Sulige Gas Field.The actual application result indicated that this method improved the accuracy of the simulation of shear wave velocity.