张美玲,张永超,任雅楠,等. 一种变系数动态剩余油饱和度方程的构建[J]. 科学技术与工程, 2021, 21(4): 1327-1333.
Zhang Meiling,Zhang Yongchao,Ren Yanan,et al.Construction of a dynamic remaining oil saturation equation with variable coefficients[J].Science Technology and Engineering,2021,21(4):1327-1333. |
| 一种变系数动态剩余油饱和度方程的构建 |
| Construction of a dynamic remaining oil saturation equation with variable coefficients |
| 投稿时间：2020-04-26 修订日期：2020-11-20 |
| DOI： |
| 中文关键词: 变系数 相对渗透率 含水率 剩余油饱和度 渗饱公式 |
| 英文关键词:Variable coefficient Relative permeability Water production rate Remaining oil saturation Percolating saturation formula |
| 基金项目:基于数字岩心实验的微观控油电阻率等效模型构建 |
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| 摘要点击次数: 55 |
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| 中文摘要: |
| 油田开发中后期，地下剩余油的评估一直是油田开发的重要工作。当前比较精确的评估工作是在开发区块钻更多的加密井，并利用测量的井曲线进行剩余油评价，但这种方式会增加更多的开发成本。依据油田采油井开采过程中的实际含水率推演地下岩层剩余油饱和度状况有助于油层开采方案的制定。针对岩心样品实验测定的油水相对渗透率反映了产水率与含水饱和度之间的理论关系。依据油水两相渗流理论，应用大庆长垣6口密闭取心井17块岩样的相对渗透率实验数据，研究给出由孔渗参数计算的因次法渗饱公式系数，进而构建由含水率计算含水饱和度的公式。依据该公式，可以得出不同孔渗性质的储层，即使产水率一致，储层层内的剩余油饱和度并不相同的规律认识。将研究成果应用于研究区1口新钻加密井剩余油饱和度的预测中，给出了与油藏开发相符合的开采建议，取得好的应用效果。 |
| 英文摘要: |
| In the middle and later stages of oilfield development, the evaluation of underground remaining oil is always an important work in oilfield development. The current more accurate assessment is to drill more infill wells in the development block and use the measured well logs to evaluate distribution of the remaining oil, but this treatment will increase more development costs. According to the actual water content in the process of oil production, it is helpful to deduce the remaining oil saturation of underground rock strata to formulate the plan of oil production. The relative oil-water permeability measured on the core samples experimentally reflects the theoretical relationship between the water production rate and water saturation. According to the theory of oil-water two-phase seepage, the relative permeability data of 17 rock samples from 6 closed coring Wells in Daqing Changyuan were obtained. The coefficient of the index percolating saturation formula is given by the parameters of porosity and permeability, And the formula for calculating water saturation from water production rate was constructed. This formula can be concluded that the remaining oil saturation in reservoirs with various pore and permeability properties is different even if the water production rate is the same. The research results are applied to predict the remaining oil saturation of a newly drilled infill well in the study area, and some suggestions are given out which are consistent with reservoir exploitation, so good application effort is obstained. |
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