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本文从四个方面讨论了研究盆地的石油地质模拟问题: 1.用迭加法进行地质发育史的模拟,是根据逐层迭加单元地层厚度而追溯盆地发育史,包括沉积发育史、构造发育史、圈闭发育史和油、气藏形成史。借助计算机进行一系列迭加和校正,可简化繁锁的人工操作,使这一传统的地质分析方法得到更广泛的应用。 2.模拟各种地震反射波图形,为认识沉积、构造的各种微观现象提供地震解释的理论根据,它对于地层、岩性油、气藏的勘探具有特别意义。 3.用确定型数学模型进行有机质成熟度的模拟,是基于有机质受热降解而成熟的原理,通过模拟沉积发育研究盆地温度随时间的演变,进而了解有机质受热和转化成熟的程度。根据模拟数值编制的剖面图和平面图,可以给出不同时期成熟生油岩体在空间的展布,对含油、气有利区的定性评价是有意义的。 4.借助人工热压模拟试验研究未成熟生油岩,可以获得一条完整的生油曲线,系统地反映有机质受热演化的过程,由模拟曲线提供的生油窗界限和产烃率,在许多情况下对进一步模拟盆地的生油能力,进行定量评价是必要的。沉积盆地油、气资源的定量评价涉及的内容相当广泛,盆地模拟的思路开拓了通过计算机,把各种问题用数学结合起来,展现了通过模拟实现盆地油、气潜力定量评价前景。
This article discusses the research on petroleum geology of the basin from four aspects: 1. The method of superposition for the geologic development history is to trace the developmental history of the basin according to the layer thickness of the unit by layer, including the sedimentary development history, tectonic development history , The development history of traps and the formation history of oil and gas reservoirs. With the help of a series of iterations and calibrations by computer, the complicated manual operation can be simplified and the traditional geological analysis method can be more widely applied. 2. To simulate various seismic reflection wave patterns and provide theoretical basis for understanding the microscopic phenomena of sedimentary and tectonic structures. It is of particular significance for the exploration of stratigraphy, lithologic oil and gas reservoirs. 3. The simulation of organic matter maturity using a deterministic mathematical model is based on the principle that organic matter undergoes thermal degradation and maturation. By simulating sedimentary development, the evolution of the temperature of the basin over time is studied to understand the degree of organic matter heating and conversion maturation. Based on the section and plan of simulation data, the spatial distribution of mature oil-bearing rock mass in different periods can be given. It is significant to qualitatively evaluate the favorable oil and gas regions. By means of artificial hot-pressing simulation experiment, we can get a complete oil generation curve, systematically reflect the process of thermal evolution of organic matter, the boundary of oil generation window and hydrocarbon generation rate provided by the simulated curve. In many cases It is necessary to quantitatively evaluate the oil generation ability of the further simulation basin. The quantitative evaluation of oil and gas resources in the sedimentary basin involves quite a wide range of topics. The basin simulation idea opens up the possibility of using mathematics to combine various problems through the computer and presents a quantitative evaluation of the potential of oil and gas in the basin through simulation.