Multi-Phase Metering Device for Oilfield Applications

摘要

This application is related to a system and methods for sampling fluids and gases using nuclear magnetic resonance (NMR) technology. Specifically the system is related to an improved metallic pipe design for use at oil and gas well heads that includes integral coils for transmitting an NMR pulse sequence and detecting NMR signals and can be used as a component of an NMR instrument. The methods are related to obtaining and analyzing NMR spectra in stationary and flowing states.

主权项

1. A method of measuring the relative quantities of fast-relaxing and slow-relaxing components in a sample flow using nuclear magnetic resonance (NMR) relaxometry, comprising the steps of:
flowing a sample comprising at least two components through the pipe, the at least two components comprising a fast-relaxing component and a slow-relaxing component; measuring a relaxation curve corresponding to at least one fast-relaxing component as the sample flows through the pipe; calculating a proportion of fast-relaxing component in the flowing sample based on relaxation spectra obtained from the measured relaxation curve; and calculating a proportion of a slow-relaxing component in the flowing sample based on the calculated proportion of fast-relaxing component.