Abstract: Various types of oil-gas reservoirs occur in Turpan-Hami basin, with complicated features of response display of oil-gas beds. There are high resistivity aqueous stratum, low resistivity oil-gas stratum, and normal high resistivity oil-gas stratum in the same time. As the electric response of low resistivity oil-gas stratum showing a little difference with their surrounding beds and aquifer bed, it is hard to be identified, tending to be overlooked and ignored. In recent years by reinvestigation of old wells situated in west Taibei depression, a number of low resistivity oil-gas beds has not only been discovered, but also the relative matured techniques for such identification established. The paper systematically summarized the peculiar response of low resisitivity oil-gas beds,physical mechanism and well- logging data evaluation method, which have constructive meaning for explanation and evaluation of such type oil-gas beds.

Key words: Turpan basin, Hami basin, Taibei sag, resistivity, oil and gas migration, mechanism, well-logging interpretation