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根据潜山油藏岩性分布复杂、非均质性强的特点,提出了变质岩潜山油藏相控建模方法,即依据“优势岩性”理论,利用录井资料中的岩性分析数据,建立变质岩相分布模型;以变质岩相为约束条件进行储层建模,实现了相控条件下基质的孔渗模拟。针对该类油藏裂缝发育、存在裂缝渗透率各向异性的特点,将各向异性建模方法引入潜山裂缝性油藏建模中,建立裂缝渗透率各向异性的定量表征模型。该方法考虑了裂缝和基质渗流特征,建立了双重介质模型,更便于与油藏数值模拟结合应用。
According to the characteristics of complicated lithology distribution and strong heterogeneity in buried hill reservoirs, a phase-controlled modeling method for metamorphic buried hill reservoirs is proposed, which is based on the theory of “dominant lithology” Based on the analysis data, the model of metamorphic lithofacies distribution was established. The reservoir model was modeled by metamorphic lithofacies, and the porosity and permeability of the matrix under phase control condition were simulated. Aiming at the fracture development of this type of reservoirs, there exists the anisotropy of fracture permeability. The anisotropic modeling method is introduced into the modeling of buried fracture fractured reservoirs, and the quantitative characterization model of fracture permeability anisotropy is established. The method takes into account the characteristics of fractures and matrix seepage and establishes a dual medium model, which can be more easily applied in combination with reservoir numerical simulation.