Abstract

ADCO's Business Plan demands a high number of wells to be delivered in development Fields for better reservoir sweeping efficiency such as: Infill drilling, injector's patterns and maintenance work-over operations in the end of each year, that result in increase of 50% of rigs fleet to meet the DWS (Drilling work over schedule) requirements in the next 5 years because the expansion in production will be from 1.4 MM bpd to 1.8 MM bpd. The rig move is an important component in the DWS as the average rig move between the wells is 4.6 days which in total 110 days and that is our driver to minimize the time consumed in rig move and gain more days for BP

This Presentation will develop a study case for rig move optimization in BAB and ASAB Fields. In general two possible operation to move rigs are followed in our company: Mast-Up when the road allow us to do that, or conventional movement Mast-Down, if there are any obstacle in the way, like power lines, conductor lines or limited spaces (these movement requires additional time for laying down and rigging up the mast).

The main idea of this study was to analyze the wells planned for BAB and ASAB fields individually for the next year and assign the rigs in order to avoid the movements Mast-Down, additionally trying to minimize the distance for the movement of the rigs and to accelerate the movement. Keeping this in mind the first step was plot all the wells planned in the original schedule and try to find nearest locations in reasonable time sequence, reassigning wells between rigs, also noting the power lines and pipes already in place, minimizing the crossing of these. Subsequently a review of the initial scenario and the proposed one was issued and all the possible savings in time and money were calculated. We found savings in ASAB field estimated in 60 days and 8 MM $, for BAB field the savings are 390 day and 19 MM $

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