The influences of threshold pressure gradient, vertical heterogeneity, subzone thickness and areal sand thickness distribution on development of low-permeability heterogeneous reservoirs are analyzed.
根据低渗透非均质油藏的特点，分析了启动压力梯度、纵向非均质性、小层厚度和平面砂体厚度展布对该类油藏开发的影响。
The distribution of oil and water is mainly controlled by sedimentary facies, structures and the thickness of sand bodies.
油水分布主要受相带、构造和砂体厚度等因素控制。
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