Multi-parameter detection of two-phase fluid in coal-bed methane wells.

In order to find out the variation characteristics and flow laws of two-phase fluid in coalbed methane (CBM) wells, the fluid parameters detector was developed, which had the functions to not only monitor the fluid pressure, temperature, fluid level, velocity, density distribution and bubbles forms of two-phase fluid, but also provide actual data to forecast the variations characteristics or show flow laws of two-phase fluid in coalbed methane wells. Based on the working principles and structures of the detector parts, the detection methods of the key two-phase fluid parameters including density distribution, bubbles forms and flow were established. Therefore, the detector can be applied in CBM and shale gas drainage, as well as in intelligent gas drainage. [ABSTRACT FROM AUTHOR]