Artificial sandstone preparation method

This paper addresses the challenges faced in the CO2 sequestration research project in Kazakhstan due to the limited availability and substandard quality of core samples. It underscores the necessity for using sandstone analogs to ensure reliable and consistent test outcomes, especially in measuring the rock's deformation and failure strength. The paper details the efforts made to create synthetic sandstone samples that closely resemble the original reservoir sandstones in particle size, cement content, mineral composition, and porosity. The study found that metakaolin forms a weak cement bond and that kaolin fully converts to metakaolin at 500°C, but not at 200°C. Additionally, the shear strength of sandstone samples depends on the particle size, mineralogy, and clay content. Furthermore, it explores the triaxial test responses of both the reservoir sand and the synthetic sandstone samples.