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压溶作用产生的缝合线是烃富集的场所及初次运移的通道。碳酸盐岩烃源岩压溶过程中,随着地层厚度和体积的减小,未熟和低熟油气会伴随孔隙流体一同排出。根据碳酸盐岩埋藏与压溶机理,提出了压溶的碳酸盐岩缝合线或溶解缝厚度恢复及其古厚度恢复的数学模型,同时结合碳酸盐岩基质和缝合线孔隙度随深度的变化曲线建立了定量计算碳酸盐烃源岩压溶排烃量的数学模型。上述数学模型的关键是确定压溶作用开始和结束的深度和时间。缝合线的厚度可根据岩心或岩石薄片直接测定。
Sizing caused by the pressure solution is a hydrocarbon-rich site and the first migration pathway. During the process of compressive dissolution of carbonate source rock, as the thickness and volume of formation decrease, the immature and low mature oil and gas will be discharged together with the pore fluid. According to the burial and pressure-dissolving mechanism of carbonate rocks, a mathematic model was proposed to restore the thickness of dissolved suture or dissolution fracture of carbonate rock and restore its paleo-thickness. At the same time, the porosity of carbonate rock matrix and suture with the depth The mathematical model for quantitatively calculating the amount of hydrocarbon dissolved and discharged by carbonate source rock was established. The key to the above mathematical model is to determine the depth and time at the beginning and end of the pressure solution. The thickness of the suture can be measured directly from core or rock flake.