应用计算机模型恢复盆地的热演化史

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APPLICATION OF COMPUTER MODELS ON THE RECONSTRUCTION OF GEOTHERMAL HISTORY IN BASINS

摘要: 恢复沉积盆地的热演化史是油气勘探的基础工作之一.由于烃源岩生烃量的大小与其成熟度呈函数关系,同时地温场的变化又影响着盆地油气的运动状态,因此准确地恢复盆地地温场的变化过程,将有利于提高油气勘探效率.为此,作者研制了一套计算机模型,利用盆地已有的钻井地质资料,计算这些钻井不同地质时期的地温状态,从而清晰地反映了其有机质的热演化过程,在有充分的地温剖面情况下,便可恢复盆地热演化史.

Abstract: The reconstruction of geothermal history in sedimentary basins is one of the fundamental studies for the oil/gas exploration.Since the amount of hydrocarbons generated from source rocks shows its functional relationship to the maturity and the changes of geothermal field would influence on the behavior of oil/gas in basins,the accurate reconstruction of changing process of geothermal field in basins would be favourable for the improvement of efficiency in oil/gas exploration activities.Therefore,the authors of this paper have developed a set of models to estimate the geothermal behaviors in various geological periods by using the available data from drill wells.Thereafter,it clearly reveals the thermal evolution of organic matter and reconstructs the geothermal history of basins based on the available geothermal profiles.

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