Playbooks Supplements

Artificial Lift Techbook 2016

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Page 33 of 47

ARTIFICIAL LIFT TECHBOOK: CASE STUDY 32 | May 2016 | M easuring well fow rates is arguably the most fundamental form of oilfeld production and reservoir surveillance. Even in the most mature oil felds, operators continue to perform production testing even when other forms of surveillance are abandoned for economic reasons, which illustrates the importance of fow-rate data for both the pro- duction and reservoir engineering functions. This type of testing provides periodic measurement of oil, water and gas rates per well, which are traditionally obtained using test separators, however multiphase meters are gaining in popularity. Typically, a testing frequency of once per month is targeted, especially where it is a legal requirement. Unfortunately this is often not attained due to logistic due to logis- tic diffculties such as remote wells in the desert, jungle, unmanned offshore platforms and subsea wells. Obtaining reliable production trends can be further frustrated by test separators being either over or undersized for the well rates, making well production and/or reservoir management virtually impossible at the well scale. Accurate production trends on inaccessible remote ESP wells are obtainable. Testing the Untestable By Lawrence Camilleri Schlumberger The Lift IQ service deter- mines liquid fow rate and water cut at any time in the life of an ESP and transmits data, historical logs and regular updates to a ded- icated team of analysts. (Image courtesy of Schlumberger)

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