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储层孔隙度主要受沉积相和成岩作用的影响和控制。通过对不同沉积微相成岩强度指数与储层孔隙度之间关系的分析,建立了储层孔隙度预测模型。据此预测出渤海湾盆地鸳鸯沟地区古近系沙三下亚段储层孔隙度主要介于5.0%~30.0%之间,孔隙度大于5.8%的有效天然气储层分布于鸳鸯沟地区的斜坡带。储层孔隙度预测误差小于2.5%,其填隙物含量为1.0%~48.0%,平均为16.1%。因此该模型可用于填隙物含量较高的碎屑岩储层孔隙度预测。
The reservoir porosity is mainly affected and controlled by sedimentary facies and diagenesis. Based on the analysis of the relationship between diagenetic intensity index and reservoir porosity of different sedimentary microfacies, the reservoir porosity prediction model is established. Based on this, it is predicted that the reservoir porosity of the Paleogene Lower Es3 in the Yuanyanggou area of Bohai Bay Basin is mainly between 5.0% and 30.0%, and the effective natural gas reservoirs with porosity greater than 5.8% are located in the slope of Yuanyanggou area band. The prediction error of reservoir porosity is less than 2.5%, and the content of filler in the reservoir is 1.0% ~ 48.0% with an average of 16.1%. Therefore, the model can be used to predict the porosity of clastic reservoirs with high interstitial content.