Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

RADIATION BASED MEASUREMENT SYSTEM TO CHARACTERIZE FLUID FLOW IN PIPELINES

IP.com Disclosure Number: IPCOM000246095D
Publication Date: 2016-May-05
Document File: 5 page(s) / 109K

Publishing Venue

The IP.com Prior Art Database

Abstract

A technique for estimating fluid properties of a multi-phase fluid is disclosed. The technique includes methods and a measurement system for estimating fluid properties of a multi-phase fluid. The methods include estimation of bulk density and salinity of the multi-phase fluid. The measurement system includes a source of radiation emitting gamma or X-rays and multiple of radiation detectors to measure characteristics, such as, bulk density and salinity of fluids in a pipeline. The radiation detector is made up of inorganic scintillators, such as, bismuth germinate (BGO), Cerium-doped Lutetium Yttrium Orthosilicate (Lyso), Yttrium orthosilicate (YSO) or sodium iodide (NaI) to convert gamma or X-ray photon to light and Silicon Photo Multiplier (SiPM) to convert light into electrical signal. Compact radiation detectors are made using SiPM. SiPM requires less power supply as compared to conventional photomultipliers (PMT). Consequently, small size SiPM based detectors enable using multiple detectors in various configurations in the measurement system.

This text was extracted from a Microsoft Word document.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 36% of the total text.

RADIATION BASED MEASUREMENT SYSTEM TO CHARACTERIZE FLUID FLOW IN PIPELINES

BACKGROUND

The present invention relates generally to multi-phase fluids present in an oilfield well and more particularly to a technique for estimating fluid properties of the multi-phase fluid present in the oilfield well.

A gamma densitometer is a device that measures bulk density of a fluid in an oilfield well pipeline. The device includes a source of radiation, such as gamma rays or X-rays, and a detector. In some cases, the diameter of a pipe used in the oilfield well is large and measurement of bulk density of the fluid along a radiation beam path does not represent entire cross section of the pipe. In such cases, multiple detectors are utilized for measuring bulk density along many radiation beam paths. For example, conventional systems for measuring density of a fluid include multiple gamma-ray sources and multiple gamma-ray detectors positioned proximate to the vessel. The gamma-ray detectors are configured to detect gamma rays backscattered by the fluid from the gamma-ray sources. The gamma-ray detectors include an electron photomultiplier (PMT) tube for converting light flashes of scintillation of a crystal into an electrical pulse. A translator is used for converting the detected gamma-ray backscatter to a density value.

However, the above mentioned conventional systems use plastic scintillators and PMT for the detectors. Such detectors are large and use high voltage power for working, which requires high expense. Consequently, use of multiple PMT detectors is not feasible for detecting bulk density of the fluid in a large diameter pipe.

Therefore, it would be desirable to have an improved technique to provide estimation of fluid properties of a multi-phase fluid.

BRIEF DESCRIPTION OF DRAWINGS

Figure 1 depicts an overview of a silicon photomultiplier (SiPM).

Figure 2 depicts arrangement of detectors in a circular disc.

Figure 3 depicts arrangement of the detectors along circumference of the pipe.

Figure 4 depicts arrangement of two detectors, such that one measures primary radiation and the other measures scattered radiation.

Figure 5 depicts arrangement of two detectors along a longitudinal direction of pipe for cross correlation measurement.

DETAILED DESCRIPTION

A technique for estimating fluid properties of a multi-phase fluid is disclosed. The technique includes methods and a measurement system for estimating fluid properties of a multi-phase fluid. The methods include estimation of bulk density and salinity of the multi-phase fluid.  The measurement system includes a source of radiation emitting gamma or X-rays and multiple of radiation detectors to measure characteristics, such as, bulk density and salinity of fluids in a pipeline. The radiation detector is made up of inorganic scintillators, such as, bismuth germinate (BGO), Cerium-doped Lutetium Yttrium Orthosilicate (Lyso), Yttrium orthosilicate (YSO) or sodium iodide (NaI) to convert gamma or X-...