Abstract:

The reservoirs in the complicated piedmont structural zones of the eastern Kuqa Depression are controlled by such factors as precipitation facies,digenesis,burial depth,and tectonic stress,causing difficulties in reservoir distribution prediction.The Cretaceous in the eastern Kuqa Depression was correlated for the very first time.The Cretaceous Bashijiqike Formation is widely distributed in the eastern Kuqa,and the reservoir properties show a tendency of getting better from east to west and from north to south because of the influence of sedimentary microfacies and source distribution.The predicted valid burial depth for reservoirs with high content of rigid grains may be more than 7000m.The compaction of reservoir by the palaeotectonic stress weakens from the orogenic zone to the basin.Potential exploration areas were finally predicted through integrating various controlling factors.

Key words: reservoir controlling factor, Paleogene, Cretaceous, eastern Kuqa Depression, Tarim Basin