Tight Gas Production Characteristic And Producing Analysis Of Shenmu Gas Field

Through the analysis of reservoir characteristics, development and productioncharacteristics and gas test data of Shenmu tight gas, using the productivity evaluation method toevaluate productivity. Through the productivity evaluation method of productivity evaluationand through multiple wells analysis to further understand the reservoir characteristics anddevelopment characteristics of gas wells, and provide technical support for Shenmu gas fielddevelopment plan. Therefore, this study has important significance.Tight reservoir permeability is less than0.1×10－3μm2, gas reservoir fracturing andtransformation obtain the general need of gas well productivity. Development and production offoreign tight gas is mainly the following aspects:(1) Average single well production is low andgas well production capability is poor.(2) The single well recoverable reserves are less anddecreased year by year.(3) Taking large-scale drilling, well maintained relatively stable.Shenmu tight gas has significant characteristics in the evaluation of productioncharacteristics and producing analysis.Therefore, using Kappa’s Saphir software can get permeability, kh, fracture half lengthand other important parameters.This paper uses the R.T.A software (NPI, Blasingame, AG, FMB etc.) to evaluate thedynamic reserves calculation of Shanxi group and Taiyuan group wells.Using the pressuredrop method and producing characteristic evaluate gas well dynamic reserves. We have takenproducing well pressure drop method and because the bottomhole flow pressure drop faster inlow permeability gas reservoir, the peripheral recharges slower. So the reserves calculationresult is low.Choose a point method of Shenmu gas field as one point method to evaluate the gas well productivity. Applying the steady productivity method evaluate the productivity ofexisting data of5gas wells. Because ne point method needs fewer test points, can quickly getopen flow, make more mistakes. And steady productivity method gets open flow slowly butmakes little mistakes. So, according to the characteristics of the single point method andsteady productivity binomial method, improved the method of one point. So that it can beapplied to meet the rapid demand of gas production of all Shenmu well.In this paper the results has been widely applied, which close combine with fielddevelopment plan and the actual production.