Successful exploitation of tight sandstone gas is one the important means to ensure “increasing reserves and production” oil initiative also ways national energy security. To further improve accuracy historical matching field data such as production bottom-hole pressure during process this type reservoir, in study, a new expression wellbore for uniform flow vertical fractured wells Laplace spac...

The degree of salinity in the hydraulic fracturing rejection fluid Shaximiao reservoir central Sichuan Basin is high, and underlying mechanism causing this not clearly understood. We evaluated rock structure tight sandstone, including composition, pore structure, ion diffusion, adsorption behavior, to determine how influences sandstone’s interaction with fluid. X-ray diffraction revealed that m...

Abstract Hydraulic fracturing is an important technical means to improve the development effect of low-permeability oil and gas reservoirs. However, for low pressure, low-permeability, tight, high-clay sandstone reservoirs, conventional propped can cause serious damage reservoir restrict effect. The pre-acid technology combines acid treatment with sand-fracturing technology. A system that meets...

Water content and distribution have important impacts on gas production in water-bearing tight reservoirs. However, due to the structural chemical heterogeneity of reservoirs, water phase exists various states, which has complicated analyses effects characteristics performance. In this work, is distinguished from immobile mobile states term constrained saturation proposed. It established that c...

The fractal geometry, anisotropy, discontinuity, and non-Darcy flow of tight reservoirs exert a significant effect on well production performance. In this study, the reservoir geometry is represented by exponential functions basis microseismic data, while discontinuity fractures presented as nonequilibrium effect. impact low velocity temporal scale wellbore pressure predicted herein. Results sh...

Tight sandstone gas reservoir of Shaximiao formation in Jinqiu Gas field has the advantages wide distribution and abundant resources. Due to its low porosity, permeability strong spatial heterogeneity, this puts forward high requirements for sweet spot identification, cluster design hydraulic fracture morphology prediction. Since conventional stimulation methods can not meet requirement economy...