克拉2气田超压成因的物理模拟实验研究

Physical modeling experiment on overpressure genesis of Kela 2 Gas Field in Kuche Depression

选取库车坳陷克拉2气田作为研究对象,利用物理模拟实验模拟了克拉2气田成藏模式。对其超压特性的研究结果表明,构造挤压和充气增压是引起克拉2气田超压的主要原因;充气增压的具体机制是多级补给,也就是下部的冲起构造为上部的克拉2构造供气,使其丰度和压力都升高。

The overpressure features of Kala 2 Gas Field in Kuche Depression were analyzed. The reservoir-forming mode of this field was simulated by physical modeling experiment. The result shows that the structural extrusion and gas-filling increasing pressure are the main reasons resulting in the overpressures of Kala 2 Gas Field. The gas-filling increasing pressure is resulted from the multilevel gas supply,which increases gas abundance and pressure of Kala 2 Gas Field.