测井约束储层反演技术在低渗透油藏描述中的应用

Application log constraining reservoir invension technology to low permeability reservoir description

以已知井资料标定的井旁地震道和已形成的波阻抗模型为基础,在地质模型和地震特征的约束下,反演出波阻抗数据体,用外推或内插方法进行定性或半定量储层预测.应用结果表明:利用测井约束储层反演技术可以实现跟踪储层预测,合理指导钻井运行,及时调整井位,提高开发方案的实施效果;反演过程中,对地震记录加密采样,适当降低测井数据的分辨率,可以提高地震反演资料预测薄层的能力.

Based on the well side seismic channel of well data calibration and formed wave impedance model, under constraining condition of geologic model and seismic character, wave impedance data volume was inversed. Extrapolation or interpolative methods are employed for qualitative or half quantitative forecasting of reservoirs. Application result shows: log constraining reservoir inversion technology may realize tracking reservoir forecasting. properly guiding well drilling, adjusting well location and improving the effectiveness of development. In the process of inversion. seismic records are infilled and sampled and the resolution of log data is properly reduced to improve the capacity of forecasting thin layes by seismic inversion data