Abstract: On the basis of measured formation pressure by drilling, the relation of interval transit time and depth as well as formation pressure calculated from seismic profile, this paper analyzed distribution characteristics of formation pressure in vertical and lateral directions, suggested that there are two abnormal high pressure belts in seismic profile including Suweiyi formatiom-Silurian and Lower Cambrian-Sinian, and obvious pressure anomaly occurred in Carboniferous in Akekule area, which could form confining pressure zone, being very favourable for preservation of late-stage-formed reservoirs under underlying strata.

Key words: Tarim basin, Formation pressure, Distribution, Reservoir, Abnormal pressure, Confining pressure