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RE地区沉积环境多样,砂岩储层存在多种岩性,常规渗透率评价模型难以满足渗透率计算精度要求。主要目的层岩性包含石英砂岩、凝灰质砂岩和泥质砂岩三种岩性,不同岩性岩石所含胶结物和胶结方式差异大,致使物性差异明显。文中首先通过测井曲线识别储层的三种主要岩性,再分别建立了不同岩性储层渗透率计算模型,渗透率计算结果符合精度要求。
There are many depositional environments in the RE area, with various lithologies in the sandstone reservoirs. The conventional permeability evaluation model can hardly meet the requirements of calculating the permeability. The main target lithology includes three types of lithology, quartz sandstone, tuffaceous sandstone and shaly sandstone. The lithology of different lithology rocks contains large differences between cementation and cementing modes, resulting in obvious difference in physical properties. In this paper, the three main lithologies of the reservoir are first identified by well logging curves, and then the permeability calculation models of different lithology reservoirs are established respectively. The calculation results of permeability meet the requirements of accuracy.