TY - THES

T1 - Rig-less ESP Candidate Selection and Implementation Plan

AU - Haddar, Nesrine

N1 - embargoed until 09-09-2023

PY - 2018

Y1 - 2018

N2 - One of the major challenges that can arise when operating ESP systems in remote areas or offshore is the unavailability of workover rigs and the relatively high cost of workover jobs. This might drastically decrease the profitability of the wells, especially if the mean time between failures of the pumping system is relatively low and workovers to repair or replace the downhole assembly are more often required. This case applies to a field in which OMV is operating. The field is located in the southern desert of the country, where all aforementioned problems are occurring. This master study was therefore carried out to evaluate the possible alternatives and select the optimum solution. As a possible solution to avoid these problems, rig-less ESP alternatives were developed where the ESP assembly is deployed and pulled out of hole without the need of a workover rig. These technologies are implemented via slick-line, wireline, or coiled tubing units. This enables the reduction of workover costs and time, minimizing the operating costs and production deferments. This master thesis was conducted in collaboration with OMV in the purpose of selecting rig-less ESP candidates for the field under investigation. The rig-less ESP candidate selection consisted of two main parts: (1) the selection of the well candidates most suitable for the rig-less technologies, via a primary selection and a well ranking process using multi criteria decision analysis methods; (2) the selection and design of the most optimal rig-less technology to be installed in the chosen wells, including applicability check of the technologies, ESP designs, and recommendations for the economic evaluation. Finally a workflow of the rig-less ESP implementation plan was created, listing the necessary steps for the well and technology candidates selection.

AB - One of the major challenges that can arise when operating ESP systems in remote areas or offshore is the unavailability of workover rigs and the relatively high cost of workover jobs. This might drastically decrease the profitability of the wells, especially if the mean time between failures of the pumping system is relatively low and workovers to repair or replace the downhole assembly are more often required. This case applies to a field in which OMV is operating. The field is located in the southern desert of the country, where all aforementioned problems are occurring. This master study was therefore carried out to evaluate the possible alternatives and select the optimum solution. As a possible solution to avoid these problems, rig-less ESP alternatives were developed where the ESP assembly is deployed and pulled out of hole without the need of a workover rig. These technologies are implemented via slick-line, wireline, or coiled tubing units. This enables the reduction of workover costs and time, minimizing the operating costs and production deferments. This master thesis was conducted in collaboration with OMV in the purpose of selecting rig-less ESP candidates for the field under investigation. The rig-less ESP candidate selection consisted of two main parts: (1) the selection of the well candidates most suitable for the rig-less technologies, via a primary selection and a well ranking process using multi criteria decision analysis methods; (2) the selection and design of the most optimal rig-less technology to be installed in the chosen wells, including applicability check of the technologies, ESP designs, and recommendations for the economic evaluation. Finally a workflow of the rig-less ESP implementation plan was created, listing the necessary steps for the well and technology candidates selection.

KW - Rig-less

KW - ESP

KW - Rig-less

KW - Rigless

KW - ESP

KW - OMV

KW - TOPSIS

KW - Multi criteria decision methods

KW - design

KW - electrical submersible pump

U2 - 10.34901/mul.pub.2023.261

DO - 10.34901/mul.pub.2023.261

M3 - Master's Thesis

ER -