SHALE GAS / OIL RESERVOIRS
In addition to the quartz and carbonate diagenesis project on unconventional reservoirs, we are also interested in the microstructural changes to the rock after soaking them for a while. Shale reservoir behavior is dependent on the amount of clay, clay type, distribution of clay (fabric), and the physical and chemical stability or instability of clays as the surrounding environment changes due to drilling, completion, stimulation, possible extended well shut-in, and production. Recent studies have shown that “soaking” the shale reservoir for an extended period of time after flowback improves the well performance. But how the improved well performance varies and depends on clay content and degree of desiccation still remains unclear. Therefore, we will investigate in detail the controls on the desiccation process of clays, which is a process thought to be causing the changes in reservoir behavior during soaking.