{"id":107771,"date":"2024-12-05T20:51:13","date_gmt":"2024-12-05T20:51:13","guid":{"rendered":"https:\/\/ahay.org\/blog\/?p=107771"},"modified":"2024-12-05T21:00:08","modified_gmt":"2024-12-05T21:00:08","slug":"estimation-of-timeshifts-in-time-lapse-seismic-images-using-spectral-decomposition","status":"publish","type":"post","link":"https:\/\/ahay.org\/blog\/2024\/12\/05\/estimation-of-timeshifts-in-time-lapse-seismic-images-using-spectral-decomposition\/","title":{"rendered":"Estimation of timeshifts in time-lapse seismic images using spectral decomposition"},"content":{"rendered":"<p>An old paper is added to the <a href=\"\/wiki\/Reproducible_Documents\">collection of reproducible documents<\/a>: <a href=\"https:\/\/ahay.org\/RSF\/book\/tccs\/ltftapwd\/paper_html\/\">Estimation of timeshifts in time-lapse seismic images using spectral decomposition<\/a><\/p>\n<p><a href=\"https:\/\/ahay.org\/blog\/wp-content\/uploads\/2024\/12\/ltftapwd1_00.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-107772 img-thumbnail img-responsive\" src=\"https:\/\/ahay.org\/blog\/wp-content\/uploads\/2024\/12\/ltftapwd1_00-1024x811.png\" alt=\"\" width=\"945\" height=\"748\" srcset=\"https:\/\/ahay.org\/blog\/wp-content\/uploads\/2024\/12\/ltftapwd1_00-1024x811.png 1024w, https:\/\/ahay.org\/blog\/wp-content\/uploads\/2024\/12\/ltftapwd1_00-300x237.png 300w, https:\/\/ahay.org\/blog\/wp-content\/uploads\/2024\/12\/ltftapwd1_00-768x608.png 768w, https:\/\/ahay.org\/blog\/wp-content\/uploads\/2024\/12\/ltftapwd1_00-1536x1216.png 1536w, https:\/\/ahay.org\/blog\/wp-content\/uploads\/2024\/12\/ltftapwd1_00.png 1910w\" sizes=\"auto, (max-width: 945px) 100vw, 945px\" \/><\/a> <a href=\"https:\/\/ahay.org\/blog\/wp-content\/uploads\/2024\/12\/ltftapwd2_00.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-107773 img-thumbnail img-responsive\" src=\"https:\/\/ahay.org\/blog\/wp-content\/uploads\/2024\/12\/ltftapwd2_00-1024x811.png\" alt=\"\" width=\"945\" height=\"748\" srcset=\"https:\/\/ahay.org\/blog\/wp-content\/uploads\/2024\/12\/ltftapwd2_00-1024x811.png 1024w, https:\/\/ahay.org\/blog\/wp-content\/uploads\/2024\/12\/ltftapwd2_00-300x237.png 300w, https:\/\/ahay.org\/blog\/wp-content\/uploads\/2024\/12\/ltftapwd2_00-768x608.png 768w, https:\/\/ahay.org\/blog\/wp-content\/uploads\/2024\/12\/ltftapwd2_00-1536x1216.png 1536w, https:\/\/ahay.org\/blog\/wp-content\/uploads\/2024\/12\/ltftapwd2_00.png 1910w\" sizes=\"auto, (max-width: 945px) 100vw, 945px\" \/><\/a><\/p>\n<blockquote><p>Time-lapse timeshifts are difficult to measure from seismic data in the presense of low frequencies or thin beds causing tuning effects. We propose to decompose time-lapse seismic images into discrete frequency components using the local time-frequency transform before estimating timeshifts. Use of high frequency components mitigate problems associated with sidelobe interference. We use amplitude-adjusted plane-wave destruction (APWD) filters to invert for both timeshifts and amplitude changes between the time-lapse seismic images at each frequency. Plane-wave destruction can efficiently measure small shifts between seismic traces, making this algorithm particularly effective. The effectiveness of the proposed workflow is confirmed using a 1D synthetic example and a field data example from the Cranfield CO<span class=\"MATH\"><img decoding=\"async\" src=\"https:\/\/ahay.org\/RSF\/book\/tccs\/ltftapwd\/paper_html\/img4.png\" alt=\"$_2$\" \/><\/span>\u00a0sequestration project.<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>An old paper is added to the collection of reproducible documents: Estimation of timeshifts in time-lapse seismic images using spectral decomposition Time-lapse timeshifts are difficult to measure from seismic data in the presense of low frequencies or thin beds causing tuning effects. We propose to decompose time-lapse seismic images into discrete frequency components using the [&hellip;]<\/p>\n","protected":false},"author":17,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","activitypub_content_warning":"","activitypub_content_visibility":"","activitypub_max_image_attachments":4,"activitypub_interaction_policy_quote":"anyone","activitypub_status":"federate","footnotes":""},"categories":[7],"tags":[],"class_list":["post-107771","post","type-post","status-publish","format-standard","hentry","category-examples"],"_links":{"self":[{"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/posts\/107771","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/comments?post=107771"}],"version-history":[{"count":1,"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/posts\/107771\/revisions"}],"predecessor-version":[{"id":107775,"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/posts\/107771\/revisions\/107775"}],"wp:attachment":[{"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/media?parent=107771"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/categories?post=107771"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/tags?post=107771"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}