US 11,719,655 B2
Method for measuring oil-water distribution using dynamic nuclear polarization for magnetic resonance imaging (DNP-MRI)
Li Chen, Wuhan (CN); Junfei Chen, Wuhan (CN); Chaoyang Liu, Wuhan (CN); Zhen Zhang, Wuhan (CN); Tao Feng, Wuhan (CN); Jiwen Feng, Wuhan (CN); and Fang Chen, Wuhan (CN)
Assigned to Innovation Academy For Precision Measurement Science And Technology, Chinese Academy of Sciences, Wuhan (CN)
Filed by Innovation Academy For Precision Measurement Science And Technology, Chinese Academy of Sciences, Wuhan (CN)
Filed on Nov. 5, 2021, as Appl. No. 17/520,122.
Application 17/520,122 is a continuation of application No. PCT/CN2020/085475, filed on Apr. 18, 2020.
Claims priority of application No. 201910380282.5 (CN), filed on May 8, 2019.
Prior Publication US 2022/0057346 A1, Feb. 24, 2022
Int. Cl. G01N 24/08 (2006.01); G01R 33/44 (2006.01); G01R 33/565 (2006.01)
CPC G01N 24/081 (2013.01) [G01R 33/448 (2013.01); G01R 33/56509 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A method for measuring oil-water distribution using DNP-MRI, comprising:
(1) adding a free radical for DNP-enhanced NMR signal of a water phase or an oil phase in a sample comprising oil and water;
(2) performing an MRI on the sample and collecting an MRI image of sample without DNP enhancement;
(3) applying microwave excitation for a DNP-MRI under same MRI condition as step (2) and collecting an MRI image of the sample after DNP enhancement; and
(4) comparing the MRI image after DNP enhancement with the MRI image without DNP enhancement,
wherein in the MRI image after DNP enhancement, an area with enhanced MRI signal intensity is a selectively enhanced fluid phase distribution area, and an area without obviously changed MRI signal intensity is a non-selectively enhanced fluid phase distribution area.