Heterogeneity of Donghe Sandstone on the WesternMargin of Akekule Uplift

GUO Jian-hua; SHI Yuan-yuan; LIU Chen-sheng; ZHU Rui

On the western margin ofAkekule Up lift, the Donghe Sandstone develops very well, however, its lithology and reservoir features are different from that of other areas in Tarim basin. The main rocks are sandstone, mudstone and muddy siltstone or siltymudstone. And the sandstone is the main reservoir in this area. The analysis data of physical p roperties demonstrate that the reservoir properties of the rock in this region are middle to poor. And the properties have intensive heterogeneity vertically and laterally. Integrated analysis show that the reservoir non-homogeneity is controlled by not only the system tract in the sequence framework and also the diagenetic p rocess, especially by the cementation of carbonate and the eluviation's p rocess of the fresh water on the sequence boundary of typel. On the other hand, high frequent sea-level changes induced to form the special rhythm intervals of reservoir physical properties vertically.

1. School of Geosciences and Environment Engineering, Central South University, Changsha 410083;

2. School of Geosciences, Yangtze University, Jingzhou, Hubei 434023

Received Date: 2004-08-09

Rev Recd Date: 2004-11-11

Publish Date: 2005-09-10

Key words:

Abstract: On the western margin ofAkekule Up lift, the Donghe Sandstone develops very well, however, its lithology and reservoir features are different from that of other areas in Tarim basin. The main rocks are sandstone, mudstone and muddy siltstone or siltymudstone. And the sandstone is the main reservoir in this area. The analysis data of physical p roperties demonstrate that the reservoir properties of the rock in this region are middle to poor. And the properties have intensive heterogeneity vertically and laterally. Integrated analysis show that the reservoir non-homogeneity is controlled by not only the system tract in the sequence framework and also the diagenetic p rocess, especially by the cementation of carbonate and the eluviation's p rocess of the fresh water on the sequence boundary of typel. On the other hand, high frequent sea-level changes induced to form the special rhythm intervals of reservoir physical properties vertically.

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Heterogeneity of Donghe Sandstone on the WesternMargin of Akekule Uplift

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