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应用石油与天然气生成理论,对文留油田“深埋高温高压条件下烃源岩热演化受到抑制,程度明显偏低”的异常现象进行了讨论研究。在文留油田,当压力系数大于1.5时,有机质的热演化出现异常。对深层异常温压条件下烃源岩的生烃潜力研究表明,深层烃源岩仍具有较高的生烃潜力。同时对该区深层含烃流体相态、储集性及深部盖层封闭性能等问题进行的分析表明,文留油田深层异常温压条件下油气勘探具有良好前景。
Applying the theory of oil and gas generation, the anomalous phenomena of Wendeliu Oilfield under the conditions of deep high temperature and high pressure with suppressed thermal evolution of hydrocarbon source rocks and obviously lower degree are discussed. In Wenliu Oilfield, when the pressure coefficient is greater than 1.5, the thermal evolution of organic matter is abnormal. The study of hydrocarbon generation potential of source rocks under abnormal temperature and pressure shows that deep source rocks still have high potential for hydrocarbon generation. At the same time, the analysis of the phase behavior of the deep hydrocarbon-bearing fluids in the area, reservoir properties, and the sealing performance of the deep caprock shows that oil and gas exploration has good prospects under deep abnormal temperature and pressure conditions in the Wenliu Oilfield.