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超压封存箱内压力释放速率不仅影响油气运移,而且决定了封存箱内压力演化历史以及现今的油气藏压力。超压封存箱内压力释放机制可以划分为盖层封堵和毛细管压力封堵2种。在此基础之上,总结出2种超压释放速率的模型及其对应的压力释放速率公式,分别为基于盖层封堵机制建立的模型和基于毛细管压力封堵机制建立的模型,后者又可进一步分为封堵层/封存箱模型和封堵层—封存箱模型。通过对比指出不同压力释放速率公式的简化条件和适用范围,确定了最精确的压力释放速率模型和公式。
The rate of pressure release in an overpressure tank not only affects hydrocarbon migration but also determines the history of pressure evolution within the tank and the current reservoir pressure. Overpressure storage tank pressure release mechanism can be divided into cap sealing and capillary pressure plugging 2 kinds. On this basis, two models of overpressure release rates and their corresponding pressure release rate formulas are summarized, which are respectively based on the model established by the cap-sealing mechanism and the model established based on the capillary pressure occlusion mechanism. The latter model Can be further divided into the plugging layer / enclosure model and the plugging layer - the enclosure model. By comparing the simplified conditions and applicable ranges of different pressure release rate formulas, the most accurate pressure release rate models and formulas were determined.