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Integration of an Iterative Update of Sparse Geologic Dictionaries with ES-MDA for History Matching of Channelized Reservoirs

Title
Integration of an Iterative Update of Sparse Geologic Dictionaries with ES-MDA for History Matching of Channelized Reservoirs
Authors
Kim, SungilMin, BaehyunLee, KyungbookJeong, Hoonyoung
Ewha Authors
민배현김성일
Issue Date
2018
Journal Title
GEOFLUIDS
ISSN
1468-8115JCR Link

1468-8123JCR Link
Citation
GEOFLUIDS
Publisher
WILEY-HINDAWI
Indexed
SCIE; SCOPUS WOS
Document Type
Article
Abstract
This study couples an iterative sparse coding in a transformed space with an ensemble smoother with multiple data assimilation (ES-MDA) for providing a set of geologically plausible models that preserve the non-Gaussian distribution of lithofacies in a channelized reservoir. Discrete cosine transform (DCT) of sand-shale facies is followed by the repetition of K-singular value decomposition (K-SVD) in order to construct sparse geologic dictionaries that archive geologic features of the channelized reservoir such as pattern and continuity. Integration of ES-MDA, DCT, and K-SVD is conducted in a complementary way as the initially static dictionaries are updated with dynamic data in each assimilation of ES-MDA. This update of dictionaries allows the coupled algorithm to yield an ensemble well conditioned to static and dynamic data at affordable computational costs. Applications of the proposed algorithm to history matching of two channelized gas reservoirs show that the hybridization of DCT and iterative K-SVD enhances the matching performance of gas rate, water rate, bottomhole pressure, and channel properties with geological plausibility.
DOI
10.1155/2018/1532868
Appears in Collections:
일반대학원 > 대기과학공학과 > Journal papers
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