Innovative Pattern Balancing and Waterflood Optimization of a Super Giant Carbonate Mauddud Reservoir, Raudhatain Field, North Kuwait
- Moudi Fahad Al-ajmi (Kuwait Oil Company) | Ahmed El-Daoushy (Kuwait Oil Company) | Fatma Ashkanani (Kuwait Oil Company) | Iskandar Saleh (Kuwait Oil Company) | Ashok Pathak (Kuwait Oil Company) | Hajer Hamadi (Kuwait Oil Company)
- Document ID
- Society of Petroleum Engineers
- SPE Digital Energy Conference and Exhibition, 19-21 April, The Woodlands, Texas, USA
- Publication Date
- Document Type
- Conference Paper
- 2011. Society of Petroleum Engineers
- 3 Production and Well Operations, 4.3.4 Scale, 5.1.2 Faults and Fracture Characterisation, 3.2.3 Hydraulic Fracturing Design, Implementation and Optimisation, 5.5.11 Formation Testing (e.g., Wireline, LWD), 5.8.7 Carbonate Reservoir, 2.2.2 Perforating, 5.6.5 Tracers, 3.3 Well & Reservoir Surveillance and Monitoring, 5.7.2 Recovery Factors, 5.1 Reservoir Characterisation, 6.5.2 Water use, produced water discharge and disposal, 5.4.1 Waterflooding, 1.6 Drilling Operations, 3.3.1 Production Logging, 3.2.6 Produced Water Management
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Raudhatain-Mauddud, a super-giant depletion-drive oil reservoir in North-Kuwait, is undergoing massive development efforts, with a planned enhancement in oil production through phased pattern-waterflood. The Phase1-development covers the crestal-area of the structure, which is the focus for current development efforts through 8 inverted 9-spot patterns. This poster outlines the successful integration of a lot of team's collaboration to significantly improve the operating procedure for water flooding. This effort required a new way of managing this reservoir: a comprehensive approach of balancing voidage with injection, conducting extensive surveillance/analysis to assess the efficacy of various courses of action and, most significantly, adjusting various teams' "key performance indicators?? to align injection and production allowable with sound reservoir management principles.
An innovative unified information management system was used to monitor voidage replacement ratio (VRR) to provide a basis for pattern balancing. A very extensive surveillance operation provides the data necessary to monitor individual pattern balance and water cut performance, optimizes areal sweep efficiency by adjusting injection and production allowable, assist in planning water-shutoff operations, and design new completions.
Time lapsed monitoring and the surveillance data indicates the reservoir is relatively well connected. However, after applying the new management approach, individual waterflood pattern balance is significantly improved and the field-wide VRR is around 1.2.
All of these activities have led to the enhanced understanding of the waterflood behavior and the model updates. Sound reservoir surveillance and waterflood management procedures implemented within a diverse group of teams that have performance goals aligned with "best practice?? has resulted in effectively re-balancing this major waterflood.
Raudhatain Mauddud (RAMA) is a carbonate oil reservoir that has been discovered in North Kuwait in 1950s. The commercial oil production of RA MA has been started back in 1957 under depletion dive with no aquifer / gas cap support till 2000 when water flood project has started to share in driving the oil from the reservoir. The reservoir is subdivided mainly in two areas, the crest of the reservoir with good rock/fluid quality and the flank area with poor rock/fluid quality. RA MA reservoir is super giant reservoir with well spacing varies with close well spacing in the crestal area and wider spacing in the flank area depending mainly on the location of the wells relative to the water flood area.
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