公开(公告)号：US20210165123A1

公开(公告)日：2021-06-03

申请号：US17147099

申请日：2021-01-12

Applicant: Schlumberger Technology Corporation

Inventor： Go Fujisawa ,  Sheng Chao ,  Timothy Jones ,  Nathan Lawrence ,  Rolf Rustad ,  Li Jiang ,  Steven Gahlings

IPC: G01V8/10 ,  G01N21/3504 ,  G01N33/00 ,  G01N21/3577 ,  G01N21/552 ,  E21B49/08 ,  G01N21/15

Abstract: A sensor for monitoring CO2 in a fluid regardless of the phase properties of the fluid, i.e., regardless of whether the fluid contacting the window is a liquid water-based phase, a liquid oil-based phase, a mixture of liquid water and liquid oil-based phases, or a gas phase. The sensor includes an internal reflection window for contacting with the fluid. A mid-infrared light source directs a beam of mid-infrared radiation into the window and the beam is internal reflected at an interface between the window and the fluid. The reflected beam is passed through three narrow bandpass filters which preferentially transmit mid-infrared radiation over bands of wavelengths corresponding to absorbance peaks of water, oil and CO2. The amount of CO2 is determined from the intensities of the mid-infrared radiation passing through the three filters.

公开(公告)号：US20200165916A1

公开(公告)日：2020-05-28

申请号：US16695671

申请日：2019-11-26

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Timothy Jones ,  Nathan Lawrence ,  Go Fujisawa ,  Sheng Chao ,  Rolf Rustad

IPC: E21B47/12 ,  G01N21/552 ,  E21B47/06 ,  E21B47/00 ,  G01N33/24

Abstract: A sensor for monitoring a species which is a component of a fluid. The sensor includes an internal reflection window which, in use, is in direct contact with the fluid. The sensor further includes a mid-infrared light source which directs a beam of mid-infrared radiation into said window for attenuated internal reflection at an interface between the window and the fluid. The sensor further includes a first narrow bandpass filter which preferentially transmits mid-infrared radiation over a band of wavelengths corresponding to an absorbance peak of the species. The sensor further includes an infrared detector which detects filtered mid-infrared radiation transmitted through the first filter and a processor for measuring the intensity of the detected mid-infrared radiation transmitted through the first filter, and determines therefrom an amount of the species in the fluid.