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为了研究断层古封闭能力及封油气有效性,在兼顾了断面正应力和断层岩压实成岩作用时间两方面因素控制的断层岩现今排替压力的定量研究方法的基础上,采用本文所建立的一套断层岩古排替压力的恢复方法,对海拉尔盆地贝尔凹陷呼和诺仁构造带B29号断层在大磨拐河组二段泥岩盖层内部断层岩排替压力演化和封闭性能进行了研究.结果表明,其断层岩在伊敏组二段和三段沉积后期开始形成对油气的封闭能力,该时期晚于南屯组源岩第1次大量排烃期,不能有效的封闭住其第1次排出的油气,但与南屯组第2次大量排烃期同期,可以封闭住其第2次大量排出的油气,这一应用结果表明该方法定量恢复断层岩古排替压力是可行的.
In order to study the palaeotectonic sealing ability and the efficiency of sealing oil and gas, based on the present quantitative research methods of the displacement pressure controlled by two factors that are the normal stress in the section and the time of compaction diagenesis of fault rock, A set of methods to recover the pressure of the ancient displacements of the fault rocks was used to study the pressure evolution and sealing performance of the fault B29 in the Huamunren structural zone of the Beier sag in the Haer’erle fault in the mudstone caprock of the second member of the Damoguaihe Formation The results show that the fault rocks started to seal up the oil and gas in the second and third stage of Yimin Formation, which was later than the first large period of hydrocarbon expulsion in the source rocks of Nantun Formation, which can not effectively seal the first However, it is feasible to seal off the second large amount of oil and gas during the second large-scale hydrocarbon expulsion period of Nantun formation. This result shows that this method is feasible to quantitatively recover the paleoclimate of the fault rocks .