宽带约束反演方法

Band-constrained inversion

宽带约束反演(BCI)方法是近几年来在地震勘探反演领域里发展起来的一种新方法。它将地震资料、测井信息和先验地质知识有机地结合起来,以获得一个最的宽带声波阻抗模型.供地质家们更好地描述储层特征和进行储层横向预测。本文从反演方法角度,较详细地叙述了宽带约束反演的原理和方法,并展示了一个理论和实际资料的初步试算结果。其结果表叫,BCI方法优于目前的反褶积方法和广义线性反演(GLI)方法,尤其是在井资料比较密集的地区,它具有其它方法无可比拟的优点。BCI方法是提取高精度、高分辨率波阻抗的一个有力工具。

Band-constrained inversion is a new inversion method developed in recent years seismic exploration. It reasonably combines seismic datalogging data with priori geological knowledge to form an optimum wide band acoustic impedance model, by which geologists can make better description and lateral prediction of hydrocarbon reservoir. Band-constrained inversion is detailedly described in both principle and methodology. Theoretical and practical experimental results are presented here. It is shown that the band-constrained inversion is more superior to existing deconvolution method and generalized linear inversion method, even has the virtues the others don t have at all in the case of more well data in an area. Band-constrained inversion is an useful method for making wave impedance in high accuracy and high resolution.