摘要
普光气藏储层具有强非均质性，导致水体侵入在各层及单井间存在差异。现有数值模拟技术表征精度及模拟效率不足，难以精确表征水沿裂缝非均匀突进的特征。针对上述问题，在提高表征精度方面采用混合介质建模技术，既可提升地质模型刻画精度，又能控制有效网格数量，从而合理利用计算资源；在提升计算效率方面，采用大规模并行云计算技术，大幅提高模型运算速度，将千万级混合介质模型计算时间缩短至4 h以内。采用建模数模一体化历史拟合技术精细调整模型参数，准确表征水沿裂缝快速突进的特征，使气藏水侵模拟结果更加符合实际。该模拟技术实现了普光气藏的千万级网格混合介质模型高精度快速模拟，精确刻画出气藏水侵特征，为该类气藏的持续高效开发提供了可靠的依据。
Abstract
The reservoir of Puguang gas reservoir has strong heterogeneity, which leads to the difference of water intrusion in different layers and single wells. The existing numerical simulation techniques are lack of accuracy and efficiency, so it is difficult to accurately characterize the characteristics of water non-uniform inrush along fractures. In view of the above problems, the dual mixed medium modeling technology is adopted to improve the characterization accuracy, which can not only improve the characterization accuracy of geological model, but also control the number of grids, so as to make rational use of computing resources; in terms of improving the calculation efficiency, the large-scale parallel cloud computing technology is adopted to greatly improve the model calculation speed, and the calculation time of 10 million level dual medium model is reduced to no more than 4 hours. History matching by geological modeling and reservoir simulation integrated method is used to tune the parameters of the model to accurately characterize the feature of rapid waterflooding along the fractures, so that the simulation results of water invasion in gas reservoirs are more authentic. The simulation technology realizes the high-definition and fast simulation of Puguang gas reservoir′s 10 million grid dual medium model, accurately the water invasion characteristics of the gas reservoir, and provides reliable decision-making basis for the sustainable and efficient development of gas reservoirs.
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