More than 155 Electrical Submersible Pumps (ESP) are installed in water supply wells in one of United Arab Emirates – Abu Dhabi Onshore area fields (ADCO). The water supply wells producing wells are characterized by low reservoir pressures, high production rates, low levels of H2S and toxic gas. The produced reservoir formations mainly consist of soft limestone and with variable porosity.
This paper will highlight the major techniques used to boost ESP system run life and enhance reliability in onshore application. These techniques are as follow:
Equipment selection - Redesigning equipment to adapt to reservoir parameters and production
Upgrading of ESP equipment, accessories, seals and consumables to withstand reservoir pressure and fluid properties
Operation Practice Developing guidelines to enhance operation practice and test equipment integrity in workshop
Well condition –Monitor the well condition and advice field production and operation team to schedule the well for periodic clean out and stimulation to enhance the production
The above technical enhancements made were to improve ESP performance in scale forming and corrosive environments. The focus will be on case histories to discuss what was implemented and the methodologies that were used to overcome specific challenges encountered with the use of ESPs. The analyses will overview ESP failures from the period 2011 to 2016.