Research On Production Data Analysis And Application For Low Permeability Reservoir

For most case, the formation parameters are obtained from well test analysis, however itrequires a long term shut-in which will seriously affect production. In order to solve thisproblem, permanent gauges are employed to monitor the change of pressure and rate.Production data analysis is such a technology used in data collection, analysis, andinterpretation. Base on rate decline curves like Arps, Fetkovich, Blasingame andAgarwal-Gardner, this method can used for reserves evaluation, reservoir understanding andproduction prediction, which also yield the ability of productivity evaluation and formationparameter analysis.Low permeability reservoir yields a very slow rate for pressure recovery, so it alwaysbehaves an especially long time scale for after flow. Moreover there is almost no passageaiming at finding a effective way for long-term observation, data collection and analysis forlow permeability reservoir, as a result, data acquired from test didn，t get due attention whichhas a bad effect on production. So this dissertation focused on production data analysis for lowpermeability reservoir.Firstly, this paper introduced several kinds of production data analysis methods. Secondly,two models are established which are radial lfow model of a vertical well in round boundaryhomogenous reservoir based on non-Darcy lfow and a well with a finite conductivity verticalfracture in round boundary homogenous reservoir based on Darcy flow. Then theircorresponding Blasingame curves are plotted using Matlab sotfware. At last, a well productiondata on the low-speed non-Darcy model Blasingame typical curves were fitted verificationResults show that the production data analysis technology could not only obtain formationparameter just like well testing, but it can also relfect the dynamic characteirstics offormations.‘...