Stimulation Study Of A Novel Fiber-laden Acid Model For Carbonate Formations Of Low Pressure

Diversion with a novel Fiber-Laden Acid system for Matrix Acidizing of CarbonateFormations has become a nature stimulation for old well repeated modification.The fibers havebeen designed to be inert under surface and pumping conditions in proper time and appropriateamount.Following the principle of flow in the direction of least resistance, thus changes thecrack extension direction, generates new cracks with achieving the communication distance nearwell-bore of reservoir. The establishment of mathematical models describing the process ofoptimizing the design of fiber-laden improves the effect of the construction.In this paper, through the laboratory on the nature of the fiber, steering ability and with theformation of cracks, holes matching between experimental basis on fiber-laden acid in the matrix,conclude the relationship between concentration and density, concentration and viscosityrelationship, combining traditional reservoir simulation study ways to build fiber numericalmodel describes the process of fiber-laden of the two-dimensional two-phase three-componentmathematical model, the numerical solution obtained using ultra-relaxation method and finitedifference method. To establish a fiber-laden acid mathematical model, using C#programminglanguage to simulate different fiber flows under different fiber concentration characterize theeffect of turning the formation pressure changes. Program study the relationship between dosageand injection rate of different fibers, injection start time and end time and the formation pressurechanges.Simulation results show that the more Fiber-Laden Acid,the faster pressure increase.Concentration show little effect on pressure change. The law is consistent with the laboratory testresults.