Predicting Pressure Response of the Limited Faulted Reservoirs by Using a New Well Test Model

Well testing not only is one of the several techniques employed for reservoir characterizationpurpose but also it is the only method which relies on the fluid flow within the reservoir and theestimated property through well testing counts for more volume of the reservoir in comparisonwith other techniques such as: coring, logging, and etc. Therefore, regarding of dynamic natureof this test and significant radius of investigation, the importance of the well testing could not beneglected in any aspect during the reservoir characterization. The success of the developed welltest approaches, however, depends greatly to the analytical models developed for well testanalysis steps including: model recognition, parameter estimation, and verification.Although there have been published many analytical and semi-analytical models for varioustypes of reservoirs such as: homogenous reservoirs, fractured dual porosity systems, stresssensitivedual porosity systems, triple porosity models, horizontal wells, hydraulic fractured wellmodels, linear faults with and without leakage, parallel faults or boundaries, and etc. (Warrenand Root, 1963; De Swaan, 1976; Jabbari et al., 2011; Dreier et al. 2004; Abdassah and Ershaghi,1986), there are still lack of knowledge regarding the partially faulted reservoirs. Actually, to thebest knowledge of the authors of this study, there is no analytical or semi-analytical well testmodel that could embrace the pressure response of a fault with limited length locating at aninfinite acting radial flow system. Since achieving valuable information regarding the fault zonestructure have tremendous effects on the economical calculation at the hydrocarbon reservoirsand also influence the production strategy from these reservoirs (Knipe et al., 1998; Mattahi etal., 1998), it is essential for the engineers to correctly track the fault presence within the reservoir.Additionally, the acquiring knowledge about the hydrodynamic behavior of the faulted reservoirsis a main challenge in some other research fields including exploitation of hydrological andgeothermal reservoirs (Rafini and Larocque, 2009).