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运聚史模拟是盆地模拟最重要也是最薄弱的环节。针对已有运聚史模型的不足,提出分层的平面二维运聚模型,即现今流体势分层模拟和油气运聚历史分层模拟的模型。分层流体势模拟需要井点的地表海拔、潜水面位置和分层的流体流动压力梯度这3项已知参数,提出水势、油势和气势计算公式,求得各井点的分层流体势,即可绘出分层的现今势平面等值图,为晚近地质时期油气再次运、聚的分析提供依据。分层油气运聚史模拟为拟三维二相模型,基于浮力驱动原理及达西定律,烃源层的排烃量分配可由地质家拟定,计算结果给出探区各烃源层和运载层在不同地质时代的烃柱高度及聚集量的平面等值图。
Aggregation history simulation is the most important and weakest link in basin simulation. Aiming at the deficiency of the existing transport history model, a layered planar two-dimensional transport model is proposed, which is the model of current stratification of fluid potential and historical stratification simulation of hydrocarbon migration and accumulation. Stratified fluid potential modeling requires three well-known parameters of well point surface elevation, submerged surface location and stratified fluid flow pressure gradient, and formulas of water potential, oil potential and momentum are proposed to obtain stratified fluid potential , You can draw a layered current contour map of the current potential for the oil and gas transport again in the recent geological period to provide the basis for the analysis. Based on the buoyancy-driven principle and Darcy’s law, the hydrocarbon expulsion volume distribution in the hydrocarbon source can be formulated by the geologists. The calculation results show that the hydrocarbon source and transport layers in the exploration area are Plane contour map of hydrocarbon column height and accumulation in different geologic times.