Magnetic Resonance Multi-Phase Flowmeter Fluid Analyzer

摘要

Quantitative information regarding multiphase flow of oil, gas & water in wells or pipelines are veryimportant in continuous well performance monitoring, production optimization, flow assurance, welltesting, production allocation, etc. So far, the multiphase flow measurement methods are usually of lowefficiency, low accuracy, high cost and delay delivery, and hard to reflect the real transient fluid productionperformance at wellheads or pipelines. Therefore, it is urgent to seek accurate and reliable multiphaseflow detection devices and methods that can meet the monitoring demands of unconventional oil and gasresources. Breaking through the technical bottleneck, a novel method and device for online multiphase flowdetection based on magnetic resonance (MR) is proposed. The flowing MR data acquisition, processingand interpretation methods are proposed to fill the blank of traditional methods. The full bore, straighttube design does not restrict the flow line and eliminates wear of internal parts and pressure drops, theHalbach magnet structure is designed to provide a uniform magnetic field inside the bore while cancellingthe magnetic field outside the housing of the device, the separate antenna structure is designed to eliminateflow effects on MR measurement, and the integration of measurement and control technology realizesunmanned operation. With the good indoor experiment and field application results, it has achieved accurate, reliable, green,in-situ and online detection of multiphase flow. As a flowmeter, the device reduces the amount of measuring equipment needed and manages wellsmore efficiently. And as a ‘fluid analysis laboratory’, it can provide first-hand information on oil and gasproperties. It also marks another new application direction of MR technology in the petroleum industryafter well logging.