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Overpressure distribution and pressuring mechanism on the southern margin of the Junggar Basin, Northwestern China

机译：西北准gar尔盆地南缘超压分布与压力机制

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摘要

On the basis of the pressure data obtained from the southern margin of the Junggar Basin, Northwestern China, the distribution and evolution of overpressures in high permeable sandy and in low-permeability shale formations are characterized. The evolution of overpressures in various structural processes, especially in erosion and mechanical deformation, is quantified by numerical modeling studies. The modeling results show that anomalies of high pressure observed in boreholes are likely a combination of several effects, i.e. 1) the compaction caused by overloading, 2) the compaction caused by lateral tectonic stressing, 3) lateral transmission of hydraulic pressure associated with fold formation, and 4) vertical hydraulic connection caused by opening faults crossing formations with different initial excessive pressures. The main mechanisms of overpressures and their distributions are defined.
机译：根据西北地区准gar尔盆地南缘的压力资料，揭示了高渗透性砂岩和低渗透性页岩地层中超压的分布和演化。通过数值模型研究可以量化各种结构过程（尤其是侵蚀和机械变形）中超压的演变。模拟结果表明，在井眼中观察到的高压异常可能是多种影响的组合，即1）超载引起的压实，2）横向构造应力引起的压实，3）与褶皱形成有关的液压的横向传递4）由打开的断层穿过具有不同初始超压的地层引起的垂直液压连接。定义了超压的主要机理及其分布。

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