A two-phase, two-dimensional, dual-porosity, dualpermeability simulator is developed to study the effects of multimechanistic flow of gas and water through tight, fractured reservoirs. The formulation incorporates the Newton-Raphson procedure to linearize the set of highly non-linear partial differential equations. These equations are then solved in a fully implicit form to obtain pressure and saturation distributions within the fracture network and the matrix.

In this paper, we discuss the development of the multi-mechanistic flow simulator with respect to fractured systems. For the multimechanistic systems, higher flowrates and cumulative production are seen at early times. This is attributed to the higher drawdowns experienced by such systems. At late times, a "choking effect" is hypothesized to be responsible for higher cumulative production from systems experiencing multimechanistic flow.

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