Email Document Reference

Enter your email address below and the reference for this document will be sent to shortly from webmaster@ceesi.com.

Title: Experience With Ultrasonic Meters On High Viscosity Oil
Author: yvind Nesse Statoilhydro
Source: 2007 North Sea Flow Measurement Workshop
Year Published: 2007
Abstract: Norsk Hydro has installed two ultrasonic metering stations for custody transfer of Grane heavy crude oil at the Sture terminal outside Bergen, Norway. The export metering station consists of five parallel meter runs with ultrasonic liquid flow meters and a 30 bi-directional ball prover with 20 m3 volumes. The allocation metering station of Grane oil to Oseberg Transportation System has two meters in series and a bi-directional ball prover with 10 m3 volumes. The ultrasonic liquid flow meters are respectively 12 and 6 Krohne 5-path Altosonic V. The ultrasonic meters did not fulfil the linearity requirements of NPD. Hence it was not possible for a new K-factor to be automatically accepted by comparison with the average of the last 30 accepted K-factors with a predefined limit of acceptance of 0.3%. Several measures were taken in order to improve linearity and gain control of development of the K-factor. The 6 allocation meters have been tested with and without the Reynolds number correction implemented in the KROHNE flow computer, and new weighing factors for high viscosities have been implemented. A test program was initiated to characterise the performance of the 12 export meters over a broad range of conditions, and a model for K-factor control limits has been established. This paper will share the experience gained during testing and characterising of the ultrasonic heavy crude oil meters, and explains the final operating principles of the meters.

In order to prevent spam and automated file downloads for documents within the Measurement Library, please follow the instructions below and then you will be able to email a reference to this article.