叠前同步反演在港中油田的应用

Application of Prestack Simultaneous Inversion in Gangzhong Oilfield

港中油田位于黄骅坳陷北大港二级构造带东部,是一个在港西凸起东北斜坡古地形背景上被断层复杂化了的大型鼻状构造。通过测井资料的分析、模型建立、地震标定、子波估算以及反演,对在有测井所得弹性阻抗参量的限制下,运用迭代计算方法在同一时间得到纵波速度和横波速度以及阻抗等地震数据体进行分析。结果表明,叠前同步反演适用于港中地区的储层预测,能够很好地识别砂体。

Gangzhong Oilfield is a large nose structure which is complicated in faults in a palaeotopography background of northeast slope of Gangxi uplift,and is located in the eastern Beicagang secondary tectonic belt in Huanghua Depression.By analyzing logging data and modeling,the seismic calibration,the wavelet estimation and inversion method and processing,some seismic data such as the p-wave velocity and shear velocity and impedance are obtained by iterative computations method,a t the same time the constraints of elastic impedance parameter from logging can be analyzed.The results show that the inversion results can be used for lateral prediction of reservoir and fluid detection(especially used in detecting the gas bearing of reservoirs).