Multiphase NMR Flowmeter-Relaxometer for Controlling the State and Rapidly Changing Flow Rates of Oil Mixtures.

The paper justifies the need to improve the primary processing (separation) of oil at a drilling station or on an offshore platform, as well as describing associated problems and determining conditions for increasing the efficiency of the primary oil mixture processing. In order to ascertain the ow rate and control the state of an oil mixture supplied from the well, the authors consider the possibility of using optical instruments and flowmeters of various designs, specifically NMR flowmeter-relaxometers. The design of an industrial M-Phase 5000 NMR flowmeter-relaxometer is described, which is used for monitoring the flow rate and quality of oil and petroleum products; problems that prevent its use at a drilling rig or on an offshore platform are identified. An NMR flowmeter-relaxometer was designed to implement various modulation techniques for measuring the flow rate, as well as longitudinal and transverse relaxation times, of oil mixtures. The application of these techniques and proposed technical solutions allows this instrument to be used at a drilling station and on an offshore platform. The results of studies on various media using the developed instrument are presented. [ABSTRACT FROM AUTHOR]