用VIKIZ测井反演砂泥岩薄互层参数的方法研究

The Inversion Method of Reservoir Parameters of the Thin Sand-shale Interbeded Formation with VIKIZ Logging Data

俄罗斯的电磁传播电阻率测井阵列仪器VIKIZ具有分辨率极高的探头,利用它的视电阻率曲线可直接识别出砂泥岩薄交互层,但仍难以直观提取到砂岩层的正确物性参数。提出了一种适合于薄交互储层的VIKIZ测井资料的处理与反演方法,采用改进的阻尼型高斯-牛顿优化算法,先对VIKIZ的浅、深探测2条测井曲线分别做纵向一维反演,然后综合其5条曲线再做二维反演,实现了砂泥岩薄交互储层电阻率二维剖面的重建,可为薄互储层评价提供正确的物性参数。

VIKIZ is one electromagnetic propagation array resistivity logging tool which has fine resolution. The thin sand-shale interbeded formation can be distinguished utilizing its apparent resistivity curves, but the accurate reservoir parameters can not be obtained immediately. The data processing method for the VIKIZ logging is presented which is fit to the thin sand-shale interbeded formation. With the modified damping form of Gauss-Newton method, first, vertical one-dimension inversion is done separately using shallow and deep logging curves; then the two-dimension inversion of its five logging curves is performed. With this method, the accurate reservoir parameters for evaluation of oil saturation in the reservoirs are obtained.