TY - THES

T1 - ESP production optimization

AU - Posch, Thomas

N1 - embargoed until null

PY - 2010

Y1 - 2010

N2 - The mature field Ras Fanar was equipped with Electrical Submersible Pumps (ESP) in 1996 due to the low bottom hole flowing pressure (BHFP). Since then new wells in the mature Main Field and in the smaller West Field, which is separated by a fault, have been drilled and equipped from the start with ESP, and the drilling program proceeds. The thesis shall examine the current ESP operation on the unmanned production platform B in Ras Fanar producing in the Main Field and the West Field. Possible optimization potential and a sustainable economic shall be derived related to the actual forecast. Since data is not available centrally existing production data like water cut, productivity index, BHFP and static bottom hole pressure (SBHP) are recorded and summarized. The measurements of BHFP by means of an Echometer are started if well conditions are suitable. The platform facilities and the design are evaluated and possible restrictions in the flow line or equipment are investigated. On this basis new possibilities to increase efficiency are investigated and identified. Although there are no restrictions in regard to platform design the production data do not allow the modelling of an Inflow Performance Relationship, which is fundamental to design an ESP layout. Investigations revealed the production data measured by the offshore test separator must be allocated, which is done by the economic department only, and the reported gas-oil ratio (GOR) has to be corrected. Furthermore the measured amount of gas is lower than reported by the company EGPC, which processes the production onshore. Using the program Pipesim by Schlumberger for NodalTM Analysis improved Inflow Performance Relationship (IPR) based on the corrected data are determined. With this IPR the layout of the ESP can be recalculated well by well with the program Subpump by IHS and optimization possibilities are stated. Possible operation alternatives and the required budget are defined. Based on the assumption that the proposals can lead to an increase of pump run life and a production increase due to improved gas handling the economic calculation showed the proposals will be economically valuable, compared by Net Present Value, Pay-out Time and a comparison of Cumulative Cost of the operation modes.

AB - The mature field Ras Fanar was equipped with Electrical Submersible Pumps (ESP) in 1996 due to the low bottom hole flowing pressure (BHFP). Since then new wells in the mature Main Field and in the smaller West Field, which is separated by a fault, have been drilled and equipped from the start with ESP, and the drilling program proceeds. The thesis shall examine the current ESP operation on the unmanned production platform B in Ras Fanar producing in the Main Field and the West Field. Possible optimization potential and a sustainable economic shall be derived related to the actual forecast. Since data is not available centrally existing production data like water cut, productivity index, BHFP and static bottom hole pressure (SBHP) are recorded and summarized. The measurements of BHFP by means of an Echometer are started if well conditions are suitable. The platform facilities and the design are evaluated and possible restrictions in the flow line or equipment are investigated. On this basis new possibilities to increase efficiency are investigated and identified. Although there are no restrictions in regard to platform design the production data do not allow the modelling of an Inflow Performance Relationship, which is fundamental to design an ESP layout. Investigations revealed the production data measured by the offshore test separator must be allocated, which is done by the economic department only, and the reported gas-oil ratio (GOR) has to be corrected. Furthermore the measured amount of gas is lower than reported by the company EGPC, which processes the production onshore. Using the program Pipesim by Schlumberger for NodalTM Analysis improved Inflow Performance Relationship (IPR) based on the corrected data are determined. With this IPR the layout of the ESP can be recalculated well by well with the program Subpump by IHS and optimization possibilities are stated. Possible operation alternatives and the required budget are defined. Based on the assumption that the proposals can lead to an increase of pump run life and a production increase due to improved gas handling the economic calculation showed the proposals will be economically valuable, compared by Net Present Value, Pay-out Time and a comparison of Cumulative Cost of the operation modes.

KW - esp design submersible design optimization nodal analysis esp red sea flow correlation

KW - Tiefkreiselpumpe Optimierung Produktionsoptimierung Rotes Meer

M3 - Master's Thesis

ER -