A Method for Reducing ModelError When Interpreting PressureDerivative in Well Test Analysis.Application to Hassi Messaoud Oil Field

摘要

Modern well testing is marked by the introduction ofpressure derivative in analyzing well test data. Theimprovement of exploiting the shape and the particularpoints of the pressure derivative curve made a greatprogress in reservoir characterization and development.In certain circumstances the quality of measuredpressure data can be affected by extern or intern noises.Consequently, errors may be amplified while computingpressure derivative and the out put data of the well andthe reservoir such as wellbore storage, flow regimes,reservoir permeability, boundary limits can beunreliable.This paper present a new method for reducing modelerror by adjusting the derivative pressure in cases ofhomogeneous and naturally fractured reservoirs. A WTSsoftware is developed for providing permeability, skinfactor and well bore storage for homogeneous reservoirand interporosity flow parameter and storage coefficientfor naturally fractured reservoir as reliable as possible.