Three-dimensional and two-phase numerical simulation of fractured dry gas reservoirs

Abstract

A significant percentage of hydrocarbon reservoirs around the world is fractured. Moreover, the major part of gas reservoirs in Iran is also fractured type, so the existence of an in-house software is necessary. In this study, an efficient, user-friendly, and indigenous simulation of a three-dimensional black oil fractured dry gas reservoir has been developed through IMPES method with the two-phase flow of gas and water. The presented simulator, which was written by C ++ language and was known as fracture dry gas reservoir simulator, uses the implicit pressure and explicit saturation method for solving the equations. Also, effect of gravity pressure is neglected and effect of the capillary is considered in equations. By this simulator, we can investigate the dry gas reservoirs behavior with fractures. Darcy or non-Darcy fracture and matrix flow, Cartesian, cylindrical, and combination of Cartesian-cylindrical reservoir gridding, single porosity, dual porosity-single permeability, and dual porosity-dual permeability modeling are abilities of this simulator too. Additionally, this simulator is able to make outputs (such as pressure) at any given specific radius and time interval as numerical and/or graphical output in so little run time. Also, this simulator has PVT box and gridding box for doing the calculation of PVT and gridding. PVT box contains new correlations and EOS in comparison with another reservoir simulator. Gridding box makes us be able to simulate fractured dry gas reservoirs and hydraulically fractured well reservoirs too. Finally, the validity of this simulator was verified by comparing the simulation results with the other reservoir simulator (Eclipse) and showed a good compatibility between the developed software and Eclipse results in each time with different conditions such as various gridding conditions, various fluid data conditions and also various well configuration conditions.

Numerical Simulation of Enhanced Oil Recovery (EOR) studies for aqueous Gemini Surfactant-Polymer-Nanoparticle systems

“…These functions relate conservation equations with an elementary volume or specified region of interest; wherein each component of volumetric change is related to the fluids entering or leaving the system [38,39]. This includes the material balance equations, Darcy's law, relative permeability correlations, capillary pressure equations, and phase equilibrium equations in two-and three-phase porous media [39][40][41]. The conservation law states that the conserved quantity within a volume or at a point depends on the net rate of fluids that flow in and out of the volume (or region).…”

Improving environmental conditions of a Room and Pillar underground quarry using numerical modelling of the ventilation system

“…The use of numerical methods is widespread in mining engineering and other deep, underground simulations (Osgoui and Oreste 2007;Oreste and Cravero 2008;Oreste 2009Oreste , 2013Innaurato et al 2011;Do et al 2014Do et al , 2015aDo et al , 2015bRanjbarnia et al 2014Ranjbarnia et al , 2016Bakyani et al 2018) and allows for the development of the design of support structures, rock reinforcement, machines and systems, ensuring safety and reliability. They can also be adopted in the design of the ventilation system, taking into account the following main characteristics of the mine: the geometry of stopes, access tunnels, shafts and ramps; the air temperature outside the mine and of the rock mass surrounding underground voids; and the type and location of the pollutant production zones (number and type of diesel engines, the quantity of explosives adopted for rock breakage, gas flow rates from the rock, etc.)…”