Various analytical, semi-analytical, and empirical models have been proposed to characterize rate and pressure behavior as a function of time in tight gas and shale gas systems featuring horizontal wells with multiple hydraulic fractures. Despite a few analytical models, as well as a small number of published numerical studies, there is currently little consensus regarding the large-scale flow ...

Horizontal well and large-scale hydraulic fracturing are the main technical means for tight gas development at present. However, reservoirs characterized by strong heterogeneity, different types of Wells have production characteristics pressure propagation laws. In view above problems, based on physical reservoir reconstruction evaluation in GAS Reservoir A Sichuan Basin, three fracture models ...

Production of low-viscosity liquids (including condensates) from tight reservoirs (such as shales) is severely restricted by the ultra low-permeability of such formations, limiting production to a very small fraction (usually less than 5 percent) of the liquids-in-place. In this study, which is part of a wider investigation, we evaluate by means of numerical simulation several possible strategi...

Net pay thickness is defined as that portion of a reservoir which contains economically producible hydrocarbons with today’s technology, prices, and costs. This thickness is a key parameter of the volumetric calculation of in-place hydrocarbons, well test interpretation, and reservoir characterization. A reservoir interval is considered as net pay when it contains hydrocarbons that can flow at ...

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...