Numerical Simulation Study On Fracturing Of Shale Gas

Shale gas reservoir is a kind of "self-generation and self-reservation" type ofunconventional gas reservoir, mainly includes the adsorption gas and free gas,adsorbed gas inadsorption form, free gas exist in the free state. The unconventionality in shale gas reservoirshow in production life generally is30to50years, even longer, therefore shale gas has theadvantages of a long development mining life and long production cycle. And most shale ischaracterized by extensive distribution,big thickness, and universal gas-bearing,so that theshale gas well has a stable productivity in long term. Can be effective for shale gas reservoir,therefore, reasonable and effective development and utilization, to maintain the steadydevelopment of China’s natural gas supply has great significance. Chinese shale gas is justgetting started. So about shale gas reservoir numerical simulation research has a particularlyimportant role,This article studies on the basis of the basic principle of finite element method,considering the shale gas adsorption desorption characteristics, numerical simulation onthree-dimensional fracturing shale gas research. So the numerical simulation about shale gasreservoir research has a particularly important role, This article studies on the basis of thebasic principle of finite element method, considering the shale gas adsorption desorptioncharacteristics, numerical simulation on three-dimensional fracturing shale gas research.Baseon using mixed cell for discrete space：Cracks is described by surface cell, strata is describedby random tetrahedron cell,and compiled with Fortran language, the compilation of the finiteelement method (FEM) numerical simulator, and also can through the calculation of thissimulator has been relatively stable results. The FEM numerical simulator using is comparedwith the currently commonly used finite difference method has significant advantages onfracture description, performance is more precise and flexible, more in line with the actualsituation, and can describe the complex fracture in a reasonable manner.Basic validation instance is presented in this paper, to examine the results of thecalculation of FEM and verification model precision, and dynamic analysis for shale gasproductivity, shale gas reservoir for shale gas reservoir numerical simulation and researchprovides a new method of productivity.