Email Document Reference

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

Title: Composition Measurement Of Multiphase Flow
Author: Carl Nilsson
Source: 2019 North Sea Flow Measurement Workshop
Year Published: 2019
Abstract: The successful operation of most types of multiphase meters hinges among other things on accurate PVT properties at the operating conditions1,2. As pressure and temperature change, the gas and oil properties also change according to the total wellstream composition.Over the lifetime of a reservoir the wellstream composition will gradually change and thus the composition or stored PVT tables used in the MPFM flow-computer needs to be updated. Traditionally the total wellstream composition found by sampling gasand oil from a test separator.Bottom hole sampling (BHS)can also be used as long as the reservoir conditions allow this. Otherwise gas and oil or condensate must be sampled from a multiphase wellstream, usually close to the MPFM or WGM location. Thiscreates two challenges: 1.Obtaining high quality PVT gas and oil samples from multiphase flows is considerably more error prone than sampling from a separator.2.The recombination factor for the gas and oil compositions needed to find the wellstream composition are derived from the measured gas and oil flow rates (or GOR)measured by the MPFM. Regarding point 2 one will easily realise that if the MPFM measurements are very inaccurate for some reason, the updated wellstream composition could be worse than the old one.

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.