Fractured Heterogeneous Edge Water Gas Reservoir Pressure Dynamic Characterization Method Applications

Water invasion is a common phenomenon. At researching dynamic development of gas reservoir, water invasion dynamic is most work for fundamental. Both here and abroad there are many scholars toward water invasion question who have processed a lot of foundational work, they supposed clearly assorted water invasion models, and deduced some kinds water influx rate calculation method.Based on the substantive literature study and analytical study, this paper starts from fractured quality gas reservoir with edge water, systemically analyses formation characterization, percolation characteristic and water invasion harm of fractured quality gas reservoir with edge water in Sichuan province, studies deeply into both water invasion mode and water invasion mechanism of fractured quality gas reservoir.This paper, on the basis of modifying anciently model, establishes and derives pressure in fractured quality heterogeneous gas reservoir with edge water, thereby gets token method of pressure. At pressure optimizing, aiming at predecessor adoptive linear method, this paper adopts nonlinear optimization law, ultimately gets optimum solution of gas reservoir.At last, it applies Visual Basic to establish gas reservoir water influx performance prediction procedure, and proceeds water invasion performance prediction by utilizing early production data of practical gas reservoir. After example demonstration, it proclaims that this method mentioned in the paper is correct and reliable; meanwhile it can be applied to analysis dynamic of fractured quality gas reservoir with edge water with fast constringency rate and fine stability.