Abstract During the gas production process, evaporation of formation water leads to an increase in content and increases salinity remaining water. Salt deposition generally occurs near wellbore wellbore. When is clogged with salt deposition, it will lead a rapid decrease well pressure production. This work analyzes effects evaporation, temperature, on And mechanism was summarized. presented tec...

Abstract In conventional mud drilling, sufficient drilling fluid density is required to maintain wellbore stability. However, in gas the support ability of very weak, and stability usually good. This shows that borehole instability mechanism different from drilling. wall rock still has a certain bearing capacity after reaching peak strength. this paper, studied by using complete stress–strain m...

the rapid growth in natural gas consumption has increased the need for gas storage, in particular in the form of injection into depleted reservoirs. also, co2 sequestration into the depleted reservoirs has attracted a large attention recently. however, it is important to ensure that the injection pressure is maintained below a certain limit to avoid unsealing the cap rock or reactivation of any...

New numerical strategies that reconsider tubing force analysis (TFA) in connection with buckling induced lock-up are presented and applied. The introduce new visualizations of downhole instabilities coiled tubings (CT) for the entire run-in-hole (RIH) process. Most extended reach interventions seek to reduce compressive forces experienced by CT through usage lubrication, vibrations or tractors,...

Abstract. The mechanism of radial dispersion is essential for understanding reactive transport in the subsurface and estimating aquifer parameters required optimization design remediation strategies. Many previous studies demonstrated that injected solute firstly experienced a mixing process injection wellbore, then entered skin zone after leaving finally moved into through advective, diffusive...

analytical solutions and type curves for the constant rate radial flow of fluid in both conventional and naturally fractured reservoirs including the effect of wellbore phase redistribution are presented. an automated procedure for non-linear least square minimization using the analytical solutions and their derivatives with respect to the unknown parameters developed to analyze the pressure bu...

the resistant* of patesa against lateral displacement (le. the stability), was studied tinder a range of conditions in vitro, at a range of knee flexion angles. muscle forces were applied in physiological directions along the separate quadriceps muscles. normal muscle actions with constant tension showed constant patellar stability up to sixty degrees knee flexion, and then a significant increa...

This paper presents the results of a study with the main aim of investigating the effect of considering the pressure sensitivity of the natural fractures of a fissured formation on the transient pressure analysis of well tests. Two motivations for this study were as follows. First, many (or most in some cases) of the producing reservoirs (geothermal and petroleum) are naturally fractured, showi...

stimulated wells completed in commingled reservoirs, i.e., This paper examines tic transient pressure response from slug reservoirs in which the layers communicate only at the wellbore tests in wells completed in multiple, hy&aulically fractured coal and not in the fractures or reservoir. Under these conditions, our seams. We developed a model for stimulated wells producing model is applicablee...