Characterization and Uncertainty Reduction on Facies Distribution and Probability Cubes with Ensemble Kalman Filter History Matching

2017 ◽  
Author(s):  
Anahita Abadpour ◽  
Moyosore Adejare ◽  
Tatiana Chugunova ◽  
Renaud Deboaisne
Keyword(s):  
Kalman Filter ◽  
Ensemble Kalman Filter ◽  
History Matching ◽  
Uncertainty Reduction ◽  
Facies Distribution

Importance of Distributed Temperature Sensor Data for Steam Assisted Gravity Drainage Reservoir Characterization and History Matching Within Ensemble Kalman Filter Framework

2015 ◽  
Vol 137 (4) ◽  
Author(s):  
Amit Panwar ◽  
Japan J. Trivedi ◽  
Siavash Nejadi
Keyword(s):  
Kalman Filter ◽  
Ensemble Kalman Filter ◽  
History Matching ◽  
Reservoir Characterization ◽  
Temperature Data ◽  
Gravity Drainage ◽  
Production Data ◽  
Facies Distribution ◽  
Steam Assisted Gravity Drainage ◽  
Temperature Observations

Distributed temperature sensing (DTS), an optical fiber down-hole monitoring technique, provides a continuous and permanent well temperature profile. In steam assisted gravity drainage (SAGD) reservoirs, the DTS plays an important role to provide depth-and-time continuous temperature measurement for steam management and production optimization. These temperature observations provide useful information for reservoir characterization and shale detection in SAGD reservoirs. However, use of these massive data for automated SAGD reservoir characterization has not been investigated. The ensemble Kalman filter (EnKF), a parameter estimation approach using these real-time temperature observations, provides a highly attractive algorithm for automatic history matching and quantitative reservoir characterization. Due to its complex geological nature, the shale barrier exhibits as a different facies in sandstone reservoirs. In such reservoirs, due to non-Gaussian distributions, the traditional EnKF underestimates the uncertainty and fails to obtain a good production data match. We implemented discrete cosine transform (DCT) to parameterize the facies labels with EnKF. Furthermore, to capture geologically meaningful and realistic facies distribution in conjunction with matching observed data, we included fiber-optic sensor temperature data. Several case studies with different facies distribution and well configurations were conducted. In order to investigate the effect of temperature observations on SAGD reservoir characterization, the number of DTS observations and their locations were varied for each study. The qualities of the history-matched models were assessed by comparing the facies maps, facies distribution, and the root mean square error (RMSE) of the predicted data mismatch. Use of temperature data in conjunction with production data demonstrated significant improvement in facies detection and reduced uncertainty for SAGD reservoirs. The RMSE of the predicted data is also improved. The results indicate that the assimilation of DTS data from nearby steam chamber location has a significant potential in significant reduction of uncertainty in steam chamber propagation and production forecast.

History Matching Using the Ensemble Kalman Filter on a North Sea Field Case

2006 ◽  
Author(s):  
Vibeke Eilen Jensen Haugen ◽  
Lars-Jorgen Natvik ◽  
Geir Evensen ◽  
Aina Margrethe Berg ◽  
Kristin Margrethe Flornes ◽  
...  
Keyword(s):  
Kalman Filter ◽  
North Sea ◽  
Ensemble Kalman Filter ◽  
History Matching ◽  
Field Case
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