Recovering to Formation and Evolution of Restraining Concentration Sealof Mudstone Caprock and Its Significance
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摘要: 在泥岩盖层抑制浓度封闭机制及其形成条件分析的基础上，通过异常孔隙流体压力的形成与演化对于泥岩盖层抑制浓度封闭形成与演化规律进行研究，根据异常孔隙流体压力形成与演化建立了一套泥岩盖层抑制浓度封闭形成与演化特征的恢复和预测方法。该方法不仅可以恢复泥岩盖层抑制浓度封闭的形成时期，还可以预测泥岩盖层抑制浓度封闭能力的演化过程，同时还可以确定目前泥岩盖层抑制浓度封闭的演化阶段和预测其今后的变化，将该方法应用于松辽盆地古龙凹陷古11井青山口组和嫩一、二段泥岩盖层抑制浓度封闭的形成与演化的恢复和预测中，恢复和预测的结果复合实际地质条件，表明该方法用于泥岩盖层抑制浓度封闭形成与演化是可行的。Abstract: Based on the analysis of restraining concentration seal mechanism of mudstone caprock and its formation conditions, by studying formation and evolution law of abnormal pore fluid pressure, this paper tries to study formation and evolution of restraining concentration seal of mudstone caprock. According to the formation and evolution of abnormal pore fluid pressure, this paper has established a method recovering and forecasting the formation and evolution law of abnormal gasbearing concentration. This method can not only recover the formation period of restraining concentration seal of mudstone caprock , but also forecast its evolution process, in the mean time, determine the present evolution stage of restraining concentration seal. The method was applied in recovering and forecasting the evolution of restraining concentration seal of K1qn and K1n1+2〖KG*2〗mudstone of Well Gu11 in Gulong sag of Songliao Basin .The results are in accordance with the actual geological conditions, which indicates that the method is practical to study the formation and evolution of restraining concentration seal of mudstone caprock and the method is effective.
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Key words:
- mudstone aprock /
- restraining oncentration seal /
- evolution /
- abnormal ore fluid pressure /
- formation /
- recovering /
- forecasting /
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