岩盐地下油气储库群稳定分析及连锁破坏的地质力学模型试验

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Abstract It is very important to study whole stability and failure mechanism of gas storage cavern in layered salt rock for safe operation. The geomechanical model has been constructed with small blocks and low strength binder. Small blocks are used to simulate the deformation characteristics of salt rock，and the low-strength adhesive to simulate the strength property of salt rock. Mudstone interlayer is simulated with dewatered gypsum slices. The natural gas injection-production cycles are simulated for 4-cavern group under different internal pressures. The displacement and strain of the surrounding rock and the cavern group are automatically recorded by the displacement meters and the strain gauges buried in the model. Cavern stability under different gas production processes，the failure pressure of the caverns and the impact of mudstone interlayer on stability are analyzed. The result shows that the injection-production of single cavern have large influence and mudstone has little influence on the stability and chain failure of cavern group.

Key words： rock mechanics oil and gas storage cavern salt rock model test stability analysis chain failure

Received: 27 April 2012

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http://www.rockmech.org/EN/Y2012/V31/Is2/3681

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