{"id":6934,"date":"2021-01-11T08:48:31","date_gmt":"2021-01-11T12:18:31","guid":{"rendered":"https:\/\/artel.engr.mun.ca\/?p=6106"},"modified":"2021-01-11T08:48:31","modified_gmt":"2021-01-11T12:18:31","slug":"akter-f-imtiaz-s-zendehboudi-s-hossain-k-2021-modified-ensemble-kalman-filter-for-reservoir-parameter-and-state-estimation-in-the-presence-of-model-uncertainty-journal-of-petroleum-science-and","status":"publish","type":"post","link":"https:\/\/carleton.ca\/artel\/2021\/akter-f-imtiaz-s-zendehboudi-s-hossain-k-2021-modified-ensemble-kalman-filter-for-reservoir-parameter-and-state-estimation-in-the-presence-of-model-uncertainty-journal-of-petroleum-science-and\/","title":{"rendered":"Akter F, Imtiaz S, Zendehboudi S, Hossain K. (2021). Modified Ensemble Kalman Filter for Reservoir Parameter and State Estimation in the Presence of Model Uncertainty. Journal of Petroleum Science and Engineering. Elsevier. https:\/\/doi.org\/10.1016\/j.petrol.2020.108323"},"content":{"rendered":"<p>\t\t\t\t<strong>Abstract:<\/strong><\/p>\n<p>Ensemble Kalman filter (EnKF) is widely used in reservoir modelling for on-line history matching. Typically, it is assumed that structurally the model is an accurate representation of the reservoir and uncertainty exists only in the parameters. This paper focuses on estimating reservoir static parameters (i.e., porosity and permeability) and dynamic states using EnKF in the presence of mismatch between the reservoir and the model. An in depth investigation of the application challenges of EnKF is reported. Two modifications are introduced for joint state-parameter estimation: i) addition of error to the model to represent the mismatch between the predictive model and real system, and ii) introduction of a tuning parameter called \u2018forcing data\u2019 to the perturbation variable for dealing with a noisy system. A benchmark problem defined as \u2018tank series model\u2019 has been designed for the verification of the EnKF algorithm. Using the simplified model mathematical formulation of state estimation combined with parameter calibration is presented systematically. Later similar approach is applied to a nonlinear two-dimensional reservoir under water flooding operation. To assess the performance in history matching, a sensitivity analysis is conducted. It was observed that due to forcing data perturbation, about 13.6 % and 9% improvement is possible in history matching of the tank and reservoir cases respectively when model mismatch and uncertainty in measurement is high.<\/p>\n<p>Authors: <a href=\"https:\/\/artel.engr.mun.ca\/team_member\/farhana-akter\/\">Akter F<\/a>, Imtiaz S, Zendehboudi S,<a href=\"https:\/\/artel.engr.mun.ca\/lab-director\/\">Hossain K<\/a>.<\/p>\n<p>Link(s) for the Paper: <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S0920410520313772\">Journal Website<\/a> |ResearchGate\t\t<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Abstract: Ensemble Kalman filter (EnKF) is widely used in reservoir modelling for on-line history matching. Typically, it is assumed that structurally the model is an accurate representation of the reservoir and uncertainty exists only in the parameters. This paper focuses on estimating reservoir static parameters (i.e., porosity and permeability) and dynamic states using EnKF in [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"","_relevanssi_noindex_reason":"","_mi_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[27],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Akter F, Imtiaz S, Zendehboudi S, Hossain K. (2021). Modified Ensemble Kalman Filter for Reservoir Parameter and State Estimation in the Presence of Model Uncertainty. Journal of Petroleum Science and Engineering. Elsevier. https:\/\/doi.org\/10.1016\/j.petrol.2020.108323 - Advanced Road and Transportation Engineering Lab<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/carleton.ca\/artel\/2021\/akter-f-imtiaz-s-zendehboudi-s-hossain-k-2021-modified-ensemble-kalman-filter-for-reservoir-parameter-and-state-estimation-in-the-presence-of-model-uncertainty-journal-of-petroleum-science-and\/\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"CCMS Editor\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/carleton.ca\/artel\/2021\/akter-f-imtiaz-s-zendehboudi-s-hossain-k-2021-modified-ensemble-kalman-filter-for-reservoir-parameter-and-state-estimation-in-the-presence-of-model-uncertainty-journal-of-petroleum-science-and\/\",\"url\":\"https:\/\/carleton.ca\/artel\/2021\/akter-f-imtiaz-s-zendehboudi-s-hossain-k-2021-modified-ensemble-kalman-filter-for-reservoir-parameter-and-state-estimation-in-the-presence-of-model-uncertainty-journal-of-petroleum-science-and\/\",\"name\":\"Akter F, Imtiaz S, Zendehboudi S, Hossain K. 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(2021). Modified Ensemble Kalman Filter for Reservoir Parameter and State Estimation in the Presence of Model Uncertainty. Journal of Petroleum Science and Engineering. 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