Journal of Petroleum Technology, Vol.47, No.11, 992-999, 1995
Use of Transient Testing in Reservoir Management
Transient tests can be used throughout the life of the reservoir to manage and to optimize recovery of hydrocarbon fluids. This paper shows applications of various well-testing methods during the exploration, appraisal, and primary and secondary recovery phases of field projects. Single-well tests [e.g., drillstem tests (DST’s) and buildup tests] are primarily used during the various stages of field development and primary recovery, whereas multiple-well tests (e.g., interference tests) are most often used during secondary recovery A clear understanding of the type of information obtained from well tests is essential if this information is to be used properly in managing the reservoir. Examples are the different values of permeabilities calculated from single-vertical-well, horizontal-well, and multiple-well tests; the values of average reservoir pressures; and the double-porosity parameters calculated from tests in naturally fractured reservoirs. The state of the art of testing and measurement tools, acquisition systems, and interpretation methods affects the type of information obtained from well tests and should be considered by the petroleum engineer before results are used. The paper presents information to help the engineer use transient tests properly and to their fullest extent. Field examples are used when appropriate.