WES, A Robust Expert System for Well Test Analysis.

摘要

Well tests are generally performed to determine the hydrologic properties of aquifers, petroleum reservoirs and underground waste disposal sites. There are many types of well tests, however, for the purposes of this paper, we consider two of the most common: pressure draw-down tests (production of a well at a constant flow rate) and pressure build-up tests (shut-in of a well after a production period). For both of these tests, the pressure changes in the wellbore are monitored for the duration of the test. The resulting data set consists of pressure versus time values, along with the corresponding flow rate data. WES is an expert system developed for well test analysis which combines data processing and graphic representations with the expertise that can be provided by an expert system. The new possibilities offered by an expert system in the field of automatic well test analysis are discussed. 22 refs., 11 figs., 3 tabs.