Yili Kang

TL;DR: In this paper, the main formation damage mechanisms during shale gas reservoir exploitation, including the physical and chemical damage, are discussed in detail, and the systematic evaluation method of formation damage, heat treatment and working fluid loss control, as three further research directions for formation damage control and removal are proposed for the efficient development of shale gas reservoirs.

TL;DR: Wang et al. as discussed by the authors evaluated nanoparticles in water-based and oil-based drilling fluids and found that nanoparticles lead to higher plastic viscosity and yield point (YP), and lower API-filtration.

TL;DR: In this article, two kinds of methane diffusion experiments are conducted in this work to measure methane diffusion coefficients in shale cores at supercritical conditions, and the results showed that a free molecular diffusion coefficient is averaged to be 1.214'×'10−10'10'm2/s at reservoir conditions from the isobaric diffusion experiments; however, the Knudsen diffusion, surface diffusion and configurational diffusion coefficients were more significant for shale gas development.

TL;DR: In this paper, a pressure decay method was used to measure the surface diffusion coefficient of adsorbed gas (methane) with shale core plugs under in-situ conditions.

TL;DR: In this paper, a new mathematical model was developed to characterize the performance of drill-in fluid-loss control by use of lost-circulation material (LCM) during the drilling in process of fractured tight reservoirs.