Carbonate rocks frequently exhibit less predictable seismic attribute–porosity relationships because of complex and heterogeneous pore geometry. Pore geometry plays an important role in carbonate reservoir interpretation, as it influences acoustic and elastic characters. So in porosity prediction of carbonate reservoirs, pore geometry should be considered as a factor. Thus, based on Gassmann’s equation and Eshelby–Walsh ellipsoidal inclusion theory, we introduced a parameter C to stand by pore geometry and then deduced a porosity calculating expression from compressional expression of Gassmann’s equation. In this article, we present a porosity working flow as well as calculate methods of every parameter needed in the porosity inverting equation. From well testing and field application, it proves that the high-accuracy method is suitable for carbonate reservoirs.

中文翻译：

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基于加斯曼方程的碳酸盐岩储层地震孔隙度反演方法研究与应用

由于复杂而异质的孔隙几何形状，碳酸盐岩常常表现出较不可预测的地震属性与孔隙度关系。孔隙几何形状在碳酸盐岩储层解释中起着重要作用，因为它会影响声学和弹性特征。因此，在碳酸盐岩储层孔隙度预测中，应将孔隙几何形状作为考虑因素。因此，基于Gassmann方程和Eshelby-Walsh椭球包含理论，我们引入了参数C来支持孔隙几何形状，然后从Gassmann方程的压缩表达式中推导出孔隙度计算表达式。在本文中，我们介绍了孔隙度工作流程以及计算孔隙度反演方程所需的每个参数的方法。从试井和现场应用，