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由于特低渗透砂岩储层受到沉积微相和岩性的控制,储层宏观非均质性强,储层内存在类似不渗透边界特征的低渗透阻流带,确定低渗透阻流带的位置,可为特低渗透油藏中后期的井网开发调整提供依据。通过试井与生产动态资料相结合的方法,不仅可以确定强非均质性特低渗透油藏存在低渗透阻流带,而且还可判断阻流带的方向及分布。由于特低渗透油藏渗流速度慢,关井压力测试时间长,常规试井解释结果存在多解性,为此,采用数值试井分析了阻流带的形状,并对阻流带的作用进行了分析评价。结果表明,利用阻流带可以很好地解释注入水推进方向。
Because of the control of sedimentary microfacies and lithology in the ultra-low permeability sandstone reservoirs, the macroscopic heterogeneity of the reservoir is strong, and the low permeability barrier zone with similar impervious boundary features exists in the reservoir to determine the location of the low permeability barrier zone , Which can provide the basis for the development and adjustment of the well pattern in the late period of the ultra-low permeability reservoir. Through the combination of well testing and production dynamic data, it is not only confirmed that there is a low permeability flow zone in the highly heterogeneous ultra-low permeability reservoir, but also the direction and distribution of the flow blocking zone. Due to the slow seepage velocity of ultra-low permeability reservoirs and the long testing time of well shut-in pressure, there are many solutions to interpretation of conventional well test results. Therefore, the numerical well test is used to analyze the shape of the spoiler belt, Analysis and evaluation. The results show that the use of the spoiler can well explain the direction of water injection.