PROBLEMS ENCOUNTERED IN THE ANALYSIS OF PRESSURE TRANSIENT TESTS IN HORIZONTAL WELLS DRILLED IN HETEROGENEOUS RESERVOIRS

Conventional pressure tests in horizontal wells raise a lot practical problems and interpretation difficulties. As a result they have become less an less often performed by oil companies. In this paper some exa mples of ideal heterogeneous reservoirs simulated numerically are pres ented. We emphasize that well tests in horizontal wells drilled in het erogeneous reservoirs have to be conducted in a different manner than for conventional wells and that a new methodology is required to gain the maximum profit in term of reservoir characterization.