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Resolution of a Perennial Water-Cut History Match Challenge Helps to Optimize Drilling Program

Authors
Nurudeen Oluwatosin Yusuf (Chevron Nigeria Limited) | Parrish Andrew (Chevron Nigeria Limited) | Lynn Silpngarmlers (Chevron Nigeria Limited)
DOI
https://doi.org/10.2118/198851-MS
Document ID
SPE-198851-MS
Publisher
Society of Petroleum Engineers
Source
SPE Nigeria Annual International Conference and Exhibition, 5-7 August, Lagos, Nigeria
Publication Date
2019
Document Type
Conference Paper
Language
English
ISBN
978-1-61399-691-1
Copyright
2019. Society of Petroleum Engineers
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1 in the last 30 days
43 since 2007
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Reservoir_B7 is one of the top reservoirs in Adobe field and was considered for further development in a multi-year drilling campaign. The initial opportunity identification and new drill forecasts for this reservoir were done using an old simulation model. Over the years, the challenge with this model had been the prediction water production from existing producers which necessitated the introduction of local permeability barriers in the model. However, to validate this opportunity and ensure reliability of production forecasts, a new simulation study was commissioned.

A systematic approach was employed during the new study which involved continuous engagement between Earth Modeler and Simulation Engineer. This led to identification of a low-quality facies which had not been properly characterized. Recharacterization of these facies led to an improvement in history match with an overall good pressure and saturation matches on both well-by-well and reservoir levels. The latest history matched model was used to validate the proposed opportunity and indicated a sub-economic incremental recovery. This led to elimination of hitherto top opportunity from the drilling program and preventing a bad investment by the company.

File Size  2 MBNumber of Pages   15

Williams, M.A. 1998: "The Stratigraphic Method: A structured Approach to History-Matching Complex Simulation Models, SPE Reservoir Evaluation and Engineering, April: 169-176.

Tomomi Yamada: "Non-Uniqueness of History Matching", SPE 59434 paper presented at SPE Asia Pacific Conference on Integrated Modelling for Asset Management, 25-26 April 2000, Yokohama Japan.

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