Abstract
ADMA-OPCO is currently in progress of optimizing the development plans for several offshore undeveloped Abu Dhabi oil fields. A common basis in these developments is the incorporation of Intelligent Oil Field Concepts to improve recovery, safety and operating costs. This requires the application of several new technologies amongst which Smart Completions is seen as a challenging opportunity. These completions incorporate a combination of Permanent Downhole Gauges (PDHG), Inflow Control Devices (ICDs) and Multi Lateral Tie Back Systems (MLTBS) in various completion configurations.
One of these reservoirs addressed in this paper is targeted to be developed via a 5-Spot water injection pattern. Due to the high heterogeneity of carbonate reservoirs, premature water breakthrough is a major concern. The planned well configuration will add significantly to the development Drilling CAPEX, hence understanding and quantifying the benefits of utilizing ICDs and MLTBS technology is required.
Throughout this paper, the work flow used to assess the added values of ICDs and MLTBS has been presented based on sector models carefully extracted from the full field static model. These sector models target the key areas of the field where these smart wells are planned to be drilled. A history match process has been performed for model validation and to preserve the fine scale heterogeneity across the reservoirs. Approaches used for modeling these completion components using simulation software are discussed in this paper.
The results obtained from this study have shown a positive impact of MLTBS whereas the ICDs implementation has shown no significant improvement in the ultimate recovery compared to the conventional open hole completion except the establishment of uniform flow distribution form heel to toe. Additionally, several different realizations have been undertaken to investigate the key uncertainties associated with such results and these realizations were compared to results obtained from a similar study performed on an adjacent field being developed by ADMA-OPCO. Lessons learnt were captured and summarized.
