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准噶尔盆地在形成与演化过程中 ,由于受到多期构造运动的作用 ,其断裂的平面及其剖面组合特征 ,多种多样。主要存在两种构造样式 ,即 :基底卷入型构造样式和盖层滑脱型构造样式。断裂在油气的形成和演化过程中 ,具有双重的作用 ,一方面与不整合面共同组成油气运移的通道 ;另一方面起封闭作用 ,与良好盖层共同形成油气藏。究竟起那一种作用 ,主要决定于断裂何时开启 ,何时封闭 ,因此关于断层封闭性的研究 ,显得尤其重要
During the formation and evolution of the Junggar Basin, due to the multistage tectonic movement, the fractured plane and the combination of its profiles are diverse. There are mainly two kinds of structural styles, that is, a base-entangled structural style and a cap-slip structural style. Fractures play a dual role in the formation and evolution of oil and gas. On the one hand, the faults together with the unconformity make up the channels for oil and gas migration. On the other hand, the faults act as a seal and jointly form reservoirs with good cap rocks. Whether or not that kind of effect depends mainly on when the fracture is opened and when it is closed is of particular importance in the study of fault sealing