微观剩余油核磁共振二维谱测试技术

2D NMR distribution function for microscale remaining oil

王军 孟小海 王为民 刘乃贵

Wang Jun Meng Xiaohai Wang Weimin Liu Naigui

中国石化 胜利油田分公司 勘探开发研究院, 山东 东营 257015 2. 北京大学 信息学院, 北京 100871 3. 中国科学院 地质与地球物理研究所, 北京 100029

Exploration and Development Institute, SINOPEC Shengli Oilfield Company, Dongying, Shandong 257015, China 2. Peking University, Beijing 100871, China 3. Institute of Geology, Chinese Academy of Sciences, Beijing 100029, China

多孔介质中油水的有效区分是目前微观剩余油研究中的一个难题。利用核磁共振T2谱可以准确测定多孔介质中流体饱和度的特点,通过引进扩散系数这一参数,将先进的核磁共振二维谱技术应用于微观剩余油赋存状态研究中,解决了油水定量区分的问题。同时,通过提升设备技术指标、优化计算方法、建立受激回波双极脉冲梯度法等方式,解决了高黏油测量中短弛豫组分缺失的问题,使得该技术可以充分满足剩余油微观赋存状态研究需求,为实现微观剩余油的定量表征提供了一种新的实验技术。

The effective distinction between oil and water in porousmedia is a difficult problem to solve in research on microscale remaining oil.Since a NMR relaxation time spectrum can accurately measure fluid saturation in porous media, we can apply it to this research by introducing a new parameter: diffusion coefficient, which can solve the problem of the quantitative distinction between oil and water.At the same time, the problem of the missing components in high viscous oil measurement has been completely solved through improving equipment, optimizing the calculation method and establishing the stimulated echo bipolar pulse gradient.As a result, the technology can fully meet the demand of microscale remaining oil research, which provides a new experimental technique for the quantitative characterization of this remaining oil.

国家科技重大专项重点项目"胜利油田特高含水期提高采收率技术"(2011ZX05011)和中国石化胜利油田分公司项目"特高含水期微观剩余油动用机制研究"(YKY1501)资助。

https://doi.org/10.11781/sysydz201505654