New Development Concept Lead to Five Folds Recovery Increase in a North Kuwait Field
- Ahmed M. Daoud (Schlumberger) | Basel Al-Otaibi (KOC) | Dhuha Alkandari (KOC)
- Document ID
- Society of Petroleum Engineers
- SPE Middle East Oil and Gas Show and Conference, 18-21 March, Manama, Bahrain
- Publication Date
- Document Type
- Conference Paper
- 2019. Society of Petroleum Engineers
- 5.5.8 History Matching, 5.8.7 Carbonate Reservoir, 5.4 Improved and Enhanced Recovery, 5 Reservoir Desciption & Dynamics, 5.8 Unconventional and Complex Reservoirs, 5.7.2 Recovery Factors, 5.4.1 Waterflooding, 5.7 Reserves Evaluation, 5.5 Reservoir Simulation
- recovery factor, inverted 5-spot, fine-scale simulation model, Produce High and Inject Low, material balance model
- 0 in the last 30 days
- 82 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 5.00|
|SPE Non-Member Price:||USD 28.00|
One of the North Kuwait Carbonate fields which starts its production in 1957 has very low recovery factor after 60 years of production although the field was under water flooding since 1997. A workflow was developed to first understand the reason behind the low recovery and second to propose the best way to improve it.
The workflow starts with first building a material balance model to understand the main reservoir driving mechanisms. Second, a fine-scale history matched simulation model was used to understand the main reasons of the current low recovery. A Produce High and Inject Low (PHIL) concept was proposed with locating all the injectors at the deepest zone and the producers at the shallow zones. Finally, the proposed PHIL concept with inverted 5-spot horizontal wells was examined compared to the inverted 9-spot vertical wells and to the peripheral PHIL concept using the simulation model to examine the best approach to maximize the recovery.
Different outcomes from the above-mentioned workflow can be summarized as follows; first, it was found that the main driving mechanism is water injection which represents 70% of the reservoir recovery factor. Hence the importance of creating an artificial aquifer along the whole area of the field to provide the required pressure support which calls for the implementation of the PHIL concept with inverted 5-spot pattern background as the best development concept for the field. Second, the thorough data review used on building the fine-scale model shows that the current recovery is dominated by single zone which represents only 15 % of the in-place and on top of this, it was found that all the developed wells are located only on 30% of the field leaving 70% of the field undeveloped. These are the main reasons behind the low recovery. Finally, the developed PHIL concept with inverted 5-spot background shows that the recovery can be increased by five times with less number of new wells and less water injection volume required compared to the 9-spot vertical wells and the peripheral PHIL concepts. This five-folds increase in recovery encourages the asset to do a pilot to implement the proposed development strategy.
Unlike the commonly used inverted 5-spot vertical wells, this work proposes a novel approach of inverted 5-spot horizontal wells with directing the horizontal injectors at the deepest zones and the horizontal producers at the shallow zones. Hence creating an artificial bottom aquifer with minimizing the water production and maximizing the water injection distribution along the whole area of the reservoir.
|File Size||3 MB||Number of Pages||21|
Al-Anzi, E., Mousawi, A., Malik, S., Blackburn, N., Reddick, C., Rothwell, N., Young, P., Haynes, B., "The Design and Early Performance History of Two Waterflood Pilots in the Mauddud Carbonate Reservoir, North Kuwait" SPE 49458 presented at the 8th Abu Dhabi International Petroleum Exhibition and Conference held in Abu Dhabi, UAE 11-14 October 1998.
Al-Ajmi, H. Z., Mukherjee, R., and Chetri, H. B., "Integration of Dynamic data of pilot Waterflood with Rock Fabric-Implications for the Full Field Waterflood Startup in Mauddud reservoir, North Kuwait", SPE 62991 presented at the SPE Annual Technical Conference and Exhibition held in Dallas, Texas, 1-4 October 2000.
Al-Ajmi, M., El-Daoushy, A., Ashkanani, F., Saleh, I., Pathak, A., Hamadi, H., "Innovative Pattern Balancing and Waterflood Optimization of a Super Giant Carbonate Mauddud Reservoir, Raudhatain Field, North Kuwait", SPE 143061 paper presented at the SPE Digital Energy Conference and Exhibition held in the Woodlands, Texas, USA, 19-21 April 2011.
Abdul Azim, S., Al-Ajmi, H., Rice, C., Bond, D., Abdullah, S., Laughlin, B., "Reservoir Description and Static Model Build in Heterogenous Mauddud Carbonates: Raudhatain Field, North Kuwait", SPE 81524 paper presented at the SPE 13th Middle East Oil Show & Conference held in Bahrain 5-8 April 2003.
Chetri, H.B., Al-Anzi, E., Al-Rabah, A., Al-Dashti, H., Al-Mutawa, M., Chakravarthi, R., Brown M., Isby, J., and Clark, A., "Lessons Learnt and Experiences Gained During Two Years of Field Monitoring, Data Integration and Reservoir Management: A Case History of the Mauddud Waterflood, North Kuwait", SPE 83961 paper presented at Offshore Europe, Aberdeen, United Kingdom, 2-5 September 2003.
Li, B., Najeh, H., Lantz, J., Rampurawala, M., Gok, I. M., & Al-Khabbaz, M., "Detecting Thief Zones in Carbonate Reservoirs by Integrating Borehole Images with Dynamic Measurements", SPE 116286 paper presented at SPE Annual Technical Conference and Exhibition, Denver, Colorado, USA, 21-24 September 2008.
Al-Ajmi, M., Pathak, A., Al-Otaibi, B., Al-Mufarej, M., Ashkanani, F., Abdullah, W., El-Doushy, A., Al-Hamer, M., and Al-Anzi, E., "Interwell "Water" Tracer Pilots in North Kuwait Fields, A Valuable opportunity to Understand Fluid Movement within a Waterflooded Reservoir", SPE 142939 paper presented at SPE EUROPEC/EAGE Annual Conference and Exhibition, Vienna, Austria, 23-26 May 2011.
Eldaoushy, A. S., Al-Ajmi, M., and Ashkanani, F., "Utilization of Interwell Water Tracer to Study Subsurface Flow of the Injected Water and Optimize Waterflood in Mauddud Carbonate Reservoir, Raudhatain Field, North Kuwait", SPE 175200 paper presented at SPE Kuwait Oil and Gas Show and Conference held in Mishref, Kuwait, 11-14 October 2015.
Hameed, M., Al-Zuabi, Y., Al-Khaled, O., Mohammed, I. S., and Sulistiono, D., "Assessment of Porosity Uncertainty of Mauddud Formation within the "Flanks & Saddle" Parts of Raudhatain-Sabriyah of North Kuwait Using Geostatistical Inversion Technique", Society of Exploration Geophysicists, 4 November 2012.
Jamal, M. A.-R., Chetri, H., Al-Towaitan, T., Badusha, S. I., and AL-Zaabi, H., "A Paradigm Change in Water Flood Strategy Using Horizontal Injectors in The Sabriyah Field, North Kuwait", SPE172612 paper presented at the SPE Middle East Oil & Gas Show and Conference, Manama, Bahrain, 8-11 March 2015.
Singh, A., Khan, H., Majhi, S., and Al-Otaibi, B., "Integration of PLT and Tracer Data Using Pattern Recognition for Efficient Assisted History Matching of Heterogeneous North Kuwait Carbonate Reservoir", SPE183146 paper presented at Abu Dhabi International Petroleum Exhibition and Conference, Abu Dhabi, UAE, 7-10 November 2016.