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含油饱和度是评价油田储集层好坏的重要参数之一,核磁共振录井测量含油饱和度的方法简单方便,所需时间短,解决了目前其他测量含油饱和度方法所需周期长、工艺复杂的问题。针对含油饱和度的求取进行了深入分析,选择以质量浓度15 000 mg/L为标准来配置MnCl_2溶液,并确定了一系列含油饱和度浸泡时间等相关参数,分析了含油饱和度校正的理论依据及方式。经过多次的现场试验发现,增加对岩样原始状态的测量可以确定出岩样油气水损失量,提出了三次测量法,该方法可以有效校正核磁共振测定的含油饱和度,现场应用情况表明效果良好。
Oil saturation is one of the most important parameters for evaluating the quality of oilfield reservoirs. NMR logging is a simple and convenient method to measure oil saturation. The time required is short, which solves the problems of other oil saturation measurement methods such as long period, complicated question. Based on the analysis of the oil saturation, the MnCl 2 solution was selected with the concentration of 15 000 mg / L as the standard, and a series of related parameters such as the oil saturation time were determined. The theory of oil saturation correction Basis and method. After several field tests, it was found that increasing the initial state of the rock sample can determine the amount of oil-gas water loss in the rock sample. A three-time measurement method is proposed, which can effectively correct the oil saturation of the nuclear magnetic resonance measurement. The field application shows that the effect good.