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储层非均质性对油气田的勘探和开发效果影响很大。结合测井资料二次解释的孔隙度(Φ)、泥质含量(Vsh)、粒度中值(Md)、束缚水饱和度(Swi)等资料,借助BP网络对渗透率进行预测。对萨尔图油田中部葡萄花油层组的非均质性进行了定量半定量的研究,认为萨尔图油田中部葡萄花油层组PⅠ2小层层内非均质性最严重,与沉积微相密切相关。单砂层垂向上渗透率的变化以正韵律和复合式韵律为主,局部发育反韵律模式。葡萄花油层组PⅠ1—PⅠ4小层层内非均质性强弱依次为PⅠ2a,PⅠ3,PⅠ2b,PⅠ1,PⅠ4;层间非均质性在PⅠ3和PⅠ4间表现得最强,其他相对要弱;各小层平面非均质性相差无几,整体表现为较强的非均质性。
Reservoir heterogeneity greatly affects the exploration and development of oil and gas fields. Based on the second interpretation of log data, the permeability, permeability and pore volume (Φ), mud content (Vsh), median particle size (Md) and irreducible water saturation (Swi) Quantitative and semi-quantitative studies on the heterogeneity of Putaohua reservoir in the middle of the Salto oil field show that the heterogeneity of PⅠ2 in the Putaohua reservoir of central Saertu oil field is the most serious and close to the sedimentary microfacies Related. The variation of vertical permeability of single sand layer is dominated by positive rhythm and complex rhythm, and local anti-rhythm pattern is developed. The heterogeneity of PⅠ1-PⅠ4 in Putaohua oil layer was PⅠ2a, PⅠ3, PⅠ2b, PⅠ1 and PⅠ4 in the order of PⅠ3-PⅠ4. The inter-layer heterogeneity was the strongest among PⅠ3 and PⅠ4, and the others were relatively weak. The small plane heterogeneity is almost the same, the overall performance is strong heterogeneity.