储渗体差异性识别

Reservoir differential discrimination

西南石油局第二物探大队研究院,德阳 618000

The Second Brigade of Geophysical Prospecting, Southwest Petroleum Bureau, deyang 618000

以三维地震资料为基础, 以精细标定为桥梁, 结合多砂体(储层)的测井响应持证及产能状况进行了仔细的比较分析。分析出各砂层对应的反射波的波形、振幅、频率及波阻抗等地球物理特征参数与已知井的地质模型存在较好的对应关系, 并能在地震剖面以及相关多参数剖面上得到直观清晰的体现。意味着通过地震多参数的综合判别, 可以实现不同储渗体之间的差异性识别。选择典型并进行模型正演, 验证差异性识别的可靠性, 对储层进行多参数加权判别后识别出相对富集带或高渗带的分布。

On the basis of fine calibration of 3-D seismic data and comparative analysis of well log re-sponse characters and producibility state for multiple sand bodies, it is shown that the geophysical charac-teristic parameters of each sand layer, such as waveform, amplitude, frequency and impedance of reflec-tion wave, have a good corresponding re1ation with geologic model of known wells, and can be expresseddirectly and clearly on seisn1ic sections and correlation multiparaneter sections. These mean that the dif-ferential identification of various reservoirs can be realized through the conprehensive seismic multipa-nameter discrimination. Typical wells were selected to perform forward modelling for verifying the relia-bility of differential identification. After the weighted multiparameter discriminatin for reservoirs, thedistribution of relatlvely enriched zone or hkih-pem1eability zone was identified.