Abstract:

Field survey and seismic reflection profiles indicate that the followingmain fault types exist in northeastern Tarim Basin:1.imbricate thrustbelt;2.fold and thrust belt;3.recoil thrust belt;4.antithetic thrustfault;5.nappe tectonics;6.strike-slip faults.The formation of the thrustswere mainly controlled by regional stress field resulted from lateral comp-ression.Other factors are gravitation,basement control and diseguilibriumthrusting. Fault structures in this area play an important role in controllinghydrocarbon accumulation.Recoil thrust belt in Shaya Uplift and Akum,fronts of Shajinzi and Luntai major thrusts,antithetic thrust in Bostan,strike-slip fault belt in Karayergun and western Shaya and the fold,thrustbelt in Kuche Depression are favourable zones for oil accumulation.