Abstract: 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.

Key words: Kuche Depression, Kela 2 Gas Field, overpressure, structural extrusion, gas-filling increasing pressure, physical modeling experiment

摘要： 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.

关键词: 库车坳陷, 克拉2气田, 超压, 构造挤压, 充气增压, 物理模拟实验