发明名称 |
METHODS AND SYSTEMS FOR DETERMINING SURFACE RELAXIVITY OF A MEDIUM USING NUCLEAR MAGNETIC RESONANCE |
摘要 |
Methods and systems for determining surface relaxivity from nuclear magnetic resonance measurements relate to applying multiple nuclear magnetic resonance (NMR) diffusion editing Carr-Purcell-Meiboom-Gill (CPMG) pulse sequences to the porous medium, wherein the diffusion editing CPMG pulse sequences have a diffusion encoding time Δ; receiving NMR data generated by the pulse sequences; processing the received NMR data to obtain a distribution f(T2,D) for the diffusion encoding time Δ; repeating the applying, the receiving, and the processing at least one time for pulse sequences having different respective diffusion encoding times Δ to obtain respective distributions f(T2,D) corresponding respectively to the different diffusion encoding times Δ; and utilizing the respectively obtained distributions f(T2,D) to generate a surface relaxivity (ρ) determination. |
申请公布号 |
US2016139066(A1) |
申请公布日期 |
2016.05.19 |
申请号 |
US201414543290 |
申请日期 |
2014.11.17 |
申请人 |
SCHLUMBERGER TECHNOLOGY CORPORATION |
发明人 |
Luo Zhixiang;Paulsen Jeffrey;Song Yi-Qiao |
分类号 |
G01N24/08;G01R33/44;G01V3/32 |
主分类号 |
G01N24/08 |
代理机构 |
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代理人 |
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主权项 |
1. A method of determining surface relaxivity of a porous medium, comprising:
applying multiple nuclear magnetic resonance (NMR) diffusion editing Carr-Purcell-Meiboom-Gill (CPMG) pulse sequences to the porous medium, wherein the diffusion editing CPMG pulse sequences have a diffusion encoding time Δ; receiving NMR data generated by the pulse sequences; processing the received NMR data to obtain a distribution f(T2,D) for the diffusion encoding time Δ, where T2 is transverse relaxation time and D is diffusion coefficient; repeating the applying, the receiving, and the processing at least one time for pulse sequences having different respective diffusion encoding times Δ to obtain respective distributions f(T2,D) corresponding respectively to the different diffusion encoding times Δ; and utilizing the respectively obtained distributions f(T2,D) to generate a surface relaxivity (ρ) determination. |
地址 |
Sugar Land TX US |