The Application of Geological Concepts for Various Types of High-Permeability Streaks to the Full-Field Simulation Model History Matching of Carbonate Reservoir, Offshore Abu Dhabi
- Akira Shibayama (INPEX Corporation) | Mohamed Tariq Al Hamami (ZADCO) | Tatsuya Yamada (ZADCO) | Atsuro Kohda (INPEX Corporation) | Zahra Abdulla Al Farhan (ZADCO) | Sameer Bellah (ZADCO) | Toshiaki Shibasaki (ZADCO) | Sami Al Jasmi (ZADCO)
- Document ID
- Society of Petroleum Engineers
- Abu Dhabi International Petroleum Exhibition & Conference, 13-16 November , Abu Dhabi, UAE
- Publication Date
- Document Type
- Conference Paper
- 2017. Society of Petroleum Engineers
- 5.5.8 History Matching, 5.6 Formation Evaluation & Management, 5.1 Reservoir Characterisation, 1.6.9 Coring, Fishing, 5.2 Reservoir Fluid Dynamics, 5.8 Unconventional and Complex Reservoirs, 1.7 Pressure Management, 1.6 Drilling Operations, 5.4 Improved and Enhanced Recovery, 5.4.1 Waterflooding, 3 Production and Well Operations, 5.1.2 Faults and Fracture Characterisation, 1.7.5 Well Control, 5.6.4 Drillstem/Well Testing, 5.4.2 Gas Injection Methods, 5.5 Reservoir Simulation, 1.6.6 Directional Drilling, 5.8.7 Carbonate Reservoir, 5 Reservoir Desciption & Dynamics
- Carbonate Reservoir, Geological Concepts, High-Permeability Streaks, Full-Field Simulation Model History Matching, Abu Dhabi
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This paper presents a case study of full-field simulation model history matching by applying geological concepts for various types of high-permeability (high-K) streaks.
An Upper Jurassic reservoir in "Field-A" is domal shape structure and reservoir fluid is under saturated with bubble point. Field-A has been producing oil from the reservoir for 30 years with total 20 oil producers, by evolved through the secondary recovery stage, such as crestal auto gas injection (non-miscible gas), then shifted to crestal water injection to maintain reservoir pressure. The fluid monitoring results and water-cut/GOR evolution trend indicate complexity and heterogeneity of the reservoir.
Two type of high-permeability streaks associated with stromatoporoid lithofacies in the upper part and fault related fractured dolomite in the lower part of reservoir were identified through the reservoir characterization studies. The zones having the high-permeability streaks show higher well-test KH compared to the core plug based matrix KH. Model KH of the zones including high-permeability streaks were conditioned by maps of the excess KH with the following concepts:
Excess KH map was generated based on the relationship between well-test KH and stromatoporoid lithofacies thickness.
Fault related fractured dolomite:
Core observation indicates high density of open fractures is detected in dolomite of specific layers in the lower part of reservoir. Excess KH map was generated based on the relationship between excess KH and fracture density distribution estimated by 3D seismic dip attribute (fault location dependent)
Through model history matching, stromatoporoid thickness distribution in-between well control points were adjusted to modify excess KH map as one of the major uncertain parameter in the global level matching phase, considering its significant impact on pressure communication between crestal gas/water injectors and flank oil producers at overall area and history period. When it comes to local area (well-by-well level) matching phase, independent fine tuning process of excess KH maps derived from two different high-permeability streaks allowed us to achieve good matching quality for pressure, water-cut and GOR, especially for multi-lateral completion wells where injection water/gas breakthrough was occurred at different timing at each horizontal branch. The permeability modification along with the geological concepts of various high-permeability streaks contributed to achieve reasonable quality of history matching without extreme and un-realistic adjustment of the permeability model.
|File Size||2 MB||Number of Pages||14|
A. Kohda,S. Bellah,T. Shibasaki,Z.A. Al Farhan,A. Shibayama,M.T. Al Hamami,S. Al Jasmi: "Characterization of High-Permeability Streaks Associated with Heterogeneous Stromatoporoid Reefal Facies and Establishment of Modeling Workflow in Carbonate Reservoir, Offshore Abu Dhabi" SPE paper 188530-MS, presented at Abu Dhabi International Petroleum Exhibition & Conference held in Abu Dhabi, UAE, 13-16 November 2017.
Kenneth M. Brantferger,Gary Kompanik,Haitham Al-Jenaibi,Scott Dodge,Harshad Patel: "Impact and Lessons of Using High Permeability Streaks in History Matching a Giant Offshore Middle East Carbonate Reservoir" SPE paper 161426-MS, presented at Abu Dhabi International Petroleum Exhibition & Conference held in Abu Dhabi, UAE, 11-14 November 2012
O. M. Adeoye,N. Gerges,N. N. Bin Ujal,F. B. Noordin,S. S El Din,A. M. Ismail,E. Mbonu,S. A. Al Shehhi,D. J. Salem,A. M. Fawzy,M. El Maghraby,H. T. Al Menhali,A. Al Marzouqi,M. H. Jasser,M. M Yaslam: "Integrated Evaluation Approach and Implications of High Permeability Streaks in Giant Carbonate OilField" SPE paper 177824-MS, presented at Abu Dhabi International Petroleum Exhibition & Conference held in Abu Dhabi, UAE, 9-12 November 2015.