公开(公告)号：US20220178253A1

公开(公告)日：2022-06-09

申请号：US17114575

申请日：2020-12-08

申请人： M-I L.L.C.

发明人： Reda Karoum ,  Yiqiao Tang ,  Shin Utsuzawa

IPC分类号： E21B49/08 ,  G01N24/08 ,  G01N33/28

摘要： An NMR sensor is configured to make NMR measurements of a fluid and includes a housing defining a chamber. A nonmagnetic cap is deployed in the chamber and divides the chamber into first and second regions. The cap is sized and shaped to define a fluid collector in the first region. A magnet assembly is deployed in the second region and is configured to generate a static magnetic field in the fluid collector. A radio frequency (RF) coil is interposed between the magnet assembly and the cap and is configured to generate an RF magnetic field in the fluid collector. Methods include using the sensor to make NMR measurements of multi-phase fluids such as drilling fluid.

公开(公告)号：US11340377B2

公开(公告)日：2022-05-24

申请号：US16995325

申请日：2020-08-17

申请人： M-I L.L.C.

发明人： Yiqiao Tang ,  Reda Karoum ,  Yi-Qiao Song ,  Shin Utsuzawa ,  Stephen Cliffe

IPC分类号： G01V3/32 ,  G01N24/08 ,  E21B49/08 ,  G01R33/44

摘要： A method for evaluating drilling fluid includes making an NMR measurement of a sample of the drilling fluid and inverting the measurements to compute a corresponding T1T2 plot. The T1T2 plot is in turn evaluated to characterize the drilling fluid. In one embodiment, a stability index of the fluid may be computed from multiple NMR measurements made while aging the sample.