发明申请
- 专利标题: INVERSION OF NMR ECHO TRAINS USING A SUPPLEMENTARY NONLINEAR EQUALITY CONSTRAINT
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申请号: US16839859申请日: 2020-04-03
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公开(公告)号: US20200319282A1公开(公告)日: 2020-10-08
- 发明人: Baoyan Li , Julio Roberto Arro , Holger Thern , Hasan Kesserwan , Guodong Jin
- 申请人: Baoyan Li , Julio Roberto Arro , Holger Thern , Hasan Kesserwan , Guodong Jin
- 申请人地址: US TX Houston
- 专利权人: Baker Hughes Oilfield Operations LLC
- 当前专利权人: Baker Hughes Oilfield Operations LLC
- 当前专利权人地址: US TX Houston
- 主分类号: G01R33/50
- IPC分类号: G01R33/50 ; G01R33/561 ; G01R33/56 ; G01V3/32
摘要:
A method of estimating properties of a resource bearing formation includes receiving, by a processor, a measured echo train generated by a nuclear magnetic resonance (NMR) measurement device deployed in a region of interest, and a measured noise of the measured echo train, and calculating a T2 distribution subject to a nonlinear equality constraint, the nonlinear equality constraint dependent on the measured noise and a fitting error between the measured echo train and a modeled echo train. Calculating the T2 distribution includes estimating a solution for the T2 distribution that is closest to satisfying the nonlinear equality constraint.