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厚油层内部建模,一直是困扰聚合物驱开发的主要技术问题之一,由于聚合物驱主力油层葡I2油层厚度大,内部构造复杂,即使细分沉积单元后,内部非均质性依然很强,而目前的建模技术无法表示出厚油层内的非均质性,致使数值模拟无法准确模拟厚油层内部吸水状况和剩余油分布状况,严重制约着厚油层内部措施挖潜效果和实施规模。本文通过对厚油层内部夹层的发育状况和聚合物驱前后厚油层内部吸水剖面的变化,建立了厚油层内部简化建模方法,为厚油层内部的数值模拟研究和剩余油分析提供依据。
The internal modeling of thick reservoirs has been one of the major technical problems plaguing the development of polymer flooding. Due to the large thickness and the complicated internal structure of the reservoir, the main reservoir of polymer flooding is still very heterogeneous even after subdividing sedimentary units However, the current modeling techniques can not show the heterogeneity in the thick oil reservoir, which makes the numerical simulation unable to accurately simulate the water absorption inside the thick reservoir and the remaining oil distribution, which seriously restricts the potential effect and implementation scale of potential measures in the thick oil reservoir. In this paper, a simplified modeling method for the interior of thick oil reservoir is established through the development of interlayer in thick oil reservoir and the change of water absorption profile in thick reservoirs before and after polymer flooding, which provides the basis for numerical simulation and analysis of remaining oil in thick oil reservoir.