TY - THES

T1 - Artificial Lift Optimization for Cherouq Field (Tunisia)

AU - Elhooni, Adel Mohammed O

N1 - embargoed until null

PY - 2012

Y1 - 2012

N2 - The Cherouq concession is located in the Southern Tunisia desert in the Tunisian portion of Ghadames basin and was taken over by OMV in the mid of 2011. Production in Cheroug concession started in mid 2008 and the field currently is producing approximately 6,000 bopd from approximately 13 wells from eight different fields. Most of the wells are producing free flowing, a gas lift system is currently installed as well. The first wells were converted to gas lift production in the end of May 2011. In the study an artificial lift optimization for Cherouq field was done in order to find a suitable lifting method and investigate other artificial lift alternatives. Moreover to investigate the future scenarios in case of some of the production parameters has been changed. To achieve the ultimate gaols a PROSPER software was used to perform nodal analysis, and modelling each individual well, ESP (Electrical Submersible Pump) designs and Gas lift designs were performed to the wells by PROSPER as well. Water cut, gas oil ratio, productivity index and reservoir pressure sensitivity was analysed for each well to contain the whole image of how the field well perform in the future, the key for any developing plan. Sucker rod pumps were designed for three wells only, those wells are low producers and for the other wells sucker rod is not competitive to ESP or gas lift, as the production achieved by ESP and GL is much higher than what we can get with sucker rod and this is due to the limitation of the great lifting depth in addition to the amount of fluid that should be lifted to achieve a higher production rate comparing to the other lifting methods. To see if the study is applicable an economic study was performed, the thing, which judges if the project is worth to be executed.

AB - The Cherouq concession is located in the Southern Tunisia desert in the Tunisian portion of Ghadames basin and was taken over by OMV in the mid of 2011. Production in Cheroug concession started in mid 2008 and the field currently is producing approximately 6,000 bopd from approximately 13 wells from eight different fields. Most of the wells are producing free flowing, a gas lift system is currently installed as well. The first wells were converted to gas lift production in the end of May 2011. In the study an artificial lift optimization for Cherouq field was done in order to find a suitable lifting method and investigate other artificial lift alternatives. Moreover to investigate the future scenarios in case of some of the production parameters has been changed. To achieve the ultimate gaols a PROSPER software was used to perform nodal analysis, and modelling each individual well, ESP (Electrical Submersible Pump) designs and Gas lift designs were performed to the wells by PROSPER as well. Water cut, gas oil ratio, productivity index and reservoir pressure sensitivity was analysed for each well to contain the whole image of how the field well perform in the future, the key for any developing plan. Sucker rod pumps were designed for three wells only, those wells are low producers and for the other wells sucker rod is not competitive to ESP or gas lift, as the production achieved by ESP and GL is much higher than what we can get with sucker rod and this is due to the limitation of the great lifting depth in addition to the amount of fluid that should be lifted to achieve a higher production rate comparing to the other lifting methods. To see if the study is applicable an economic study was performed, the thing, which judges if the project is worth to be executed.

KW - Artificial Lift

KW - Gas Lift

KW - submersible electrical pump

KW - sucker rod pump

KW - Production optimization

KW - Cheroug field Tunisia

KW - Artificial Lift

KW - Gasfeder

KW - Tauchpumpen

KW - elektrische Pumpe

KW - Pumpe

KW - Pumpengestänge

KW - Fertigungsoptimierung

KW - Cheroug Feld Tunesien

M3 - Master's Thesis

ER -