Journal
PETROLEUM SCIENCE AND TECHNOLOGY
Volume 37, Issue 10, Pages 1123-1135Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/10916466.2019.1578795
Keywords
emulsion; NMR; crude oil; T2 spectrum; water content
Funding
- Student's Platform for Innovation and Entrepreneurship Training Program [201810425069]
- Education Quality Improvement Project for Graduate Student of Shandong Province [SDYY17021]
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Transverse relaxation times (T2) and T2 spectrum for crude oil emulsions with different water content are obtained by low field nuclear magnetic resonance Carr-Purcell-Meiboom-Gill sequence and various methods to determine the water content are investigated. The results show that there are three methods to accurately determine the water content. When water content is greater than 20.0wt%, determination through T2 value of emulsions is fastest with the relative error below 2.5%. T2 spectrum show the characteristics of multiple peaks, and T2 value of the peaks originated from water are suitable for determination of water content for O/W emulsions. A method is developed and optimized to determine the water content by using the peak-area ratio in T2 spectrum, which is not limited by the water content and the form of emulsion.
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