Wilcox Tight Gas Sandstone

A process-based multiscale network modeling approach is introduced to predict the drainage capillary pressure and relative permeability-wetting phase saturation curves at early cementation, final cementation and feldspar dissolution of the Wilcox tight gas sandstone. Predictions based on a two-scale analysis of an X-ray tomographic image are conducted as well but computational limitations make conclusions uncertain in this paper. We emphasize process-based modeling informed from thin sections as a cheap method of making a priori predictions of tight gas sandstone transport properties at various times in the paragenesis.本文提出一种基于过程的多尺度网络建模方法，用于预测威尔科克斯致密气砂岩（Wilcox tight gas sandstone）在早期胶结作用、最终胶结作用及长石溶蚀作用阶段的驱替毛细管压力与相对渗透率-润湿相饱和度曲线。此外，本文还基于X射线断层扫描图像（X-ray tomographic image）的两尺度分析开展了预测，但受计算局限性影响，本文相关结论尚不明确。本文着重强调：以薄片样本为依据的基于过程的建模方法，是一种低成本手段，可对不同成岩阶段的致密气砂岩输运性质进行先验预测。