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by: Cleon Dunham, Shaikhan al Khadhori, Abdullah al Harthy — Added 6/10/2009 12:00:00 AMSWPSC - Control

Petroleum Development Oman (PDO) is implementing an "Intelligent ESP" system to automate bean-up (well start up) and optimize normal production operation. It has been successfully tested, using a Fixed Speed Drive (FSD) with an electrically operated wellhead control valve to control the production rate. Other equipment used in the test included a downhole gauge for measuring intake pressure and other variables, a coriolis meter for measuring production rate at the wellhead, a sand monitor for measuring sand production rate, a remote terminal unit, and a SCADA system.

The ESPs can be controlled by varying the wellhead control valve position or the VSD frequency to achieve the desired production rate, tubing pressure, pump intake pressure, or level of fluid above pump.

During bean-up, the system produces at successively higher rates, with checks to assure that sand production and all other constraints are at acceptable levels. When bean-up completes, the system transitions to "n

Analyzing Well Conditions and Successfully Operation ESP's by Utilizing Integrated Controls Systems in the Sacroc CO2 Flood
by: Larkin, Rebecca; Morgan, Kinder; Rainwater, Malcolm — Added 9/20/2009 12:00:00 AMSWPSC - Control

Operating electric submersible pumps in a CO2 flood is challenging and requires applying new engineering and operational resources to be successful. Extremely high GLR’s, radically changing bottom hole pressures and changing fluid densities require more than just conventional methods for operating and troubleshooting ESP’s.

An integrated control system was used to troubleshoot well conditions that consist of high concentrations of CO2. Accurate bottom hole pressure, temperature and vibration information was collected and used to determine actual well conditions and make decisions based on real data.

This application decreases the “guess work” previously used in determining bottom hole conditions and increases the effectiveness of decision making to correct problems.

This paper is a continuation of work efforts that were started and discussed in last year’s SWPSC.