Controlling factors of the Paleogene-Cretaceous reservoirs and potential exploration areas in the eastern Kuqa Depression

Shen Yang; Ma Yujie; Zhao Libin; Zhang Ronghu; Shou Jianfeng; Zhang Huiliang

doi:10.11743/ogg20090202

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Controlling factors of the Paleogene-Cretaceous reservoirs and potential exploration areas in the eastern Kuqa Depression
Vol. 30, Issue 2, Pages: 136-142(2009)
Online First：25 April 2009，

Published：2009
DOI： 10.11743/ogg20090202
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DOI：

Shen Yang, Ma Yujie, Zhao Libin, et al. Controlling factors of the Paleogene-Cretaceous reservoirs and potential exploration areas in the eastern Kuqa Depression[J]. 2009, 30(2): 136-142. DOI： 10.11743/ogg20090202.

摘要

库车坳陷东部山前复杂构造区储层受沉积相、成岩作用、埋深及构造应力等多种因素控制

有效储层分布预测难度大。通过综合研究

首次建立起库车东部白垩系对比关系

明确白垩系巴什基奇克组在库车东部广泛分布

受沉积微相及物源分布影响

储层物性具有从东到西、从北到南变好的趋势。刚性颗粒含量较高的储层预测有效埋深可以大于7000m。古构造应力对储层的构造压实作用从造山带向盆地减弱。结合多种控制因素预测了有利储层勘探区。

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.