الفهرس | Only 14 pages are availabe for public view |
Abstract Well testing is an important tool for reservoir evaluation and characterization. Designing of a test plan is very important before starting that test. Reservoir simulation is widely used to solve research problems as well as actual field problems. This is due to the limitation of analytical solutions and its ability to be used in predictive methods for reservoir management purposes. The major objective of this research is to develop a catalogue of modeling programs (or techniques) to simulate well tests in different shapes of petroleum reservoirs using a conventional reservoir simulator GASSIM. This catalogue includes modeling programs used to simulate pressure drawdown and buildup tests for wells in homogeneous-acting reservoirs, wells containing vertical hydraulic fractures, wells intersecting naturally fractured reservoirs and wells producing from commingled layers. New or alternative modeling techniques were developed to solve specific well problems important in reservoir characterization. These new techniques include the new relations used to model the combined effect of wellbore storage and skin in pressure-transient tests and an alternative grid construction to be used in modeling well with vertical hydraulic fractures. Both oil and gas cases with radial and areal grids are designed. Comparing the results of these models with the analytical solutions from a commercial WELL TEST software has been used to verify their reliability. The developed models can be used to study the factors affecting well testing in the different shapes of reservoirs. It is believed that such approach will provide a reference for modeling, designing tests in these shapes of reservoirs, and making different studies on factors affecting pressure transient tests and affecting well behavior in them in general.iii |