叠前弹性参数反演技术在识别白云岩储层中的应用

Application of Prestack Elastic Parameters Inversion Technology in Identifying the Dolomite Reservoirs

白云岩储层由于含有轻质原油组分,纵波阻抗往往与其他岩性的阻抗叠置,常规反演往往不易区分。以Zoeppritz方程为理论依据的多角度叠加数据体反演得到的纵、横波速度、密度数据体及其组合变换参数可以很好地区分白云岩储层;流体替换技术可以作为叠前反演的先导性试验。通过叠前弹性参数反演方法在实际识别白云岩储层的应用中取得了明显的效果。

Because light oil components were contained in dolomite reservoirs,it was often difficult to distinguish it from other lithology,because their primary wave impedance was often overlapped with others in conventional inversion.By taking Zoeppritz equation as theoretical basis,primary wave velocity,second wave velocity,density and their combination parameters obtained from multi-angle stack data inversions could be used to distinguish dolomite reservoir well,while fluid replacement technology could be used as pilot test of prestack inversion.The prestack elastic parameters are used to identify dolomite reservoir and obvious effect is obtained in the actual prestack inversion.