В журнале «Успехи современного естествознания» № 9, 2017 вышла статья «Снижение неопределенности при выявлении аномалий, связанных с газонасыщением, по технологии AVO-анализа на территории Вилюйской синеклизы».
В данной статье рассматривается методика комплексного анализа для выявления перспективных этажей газоносности на примере одной из площадей Восточной Сибири. Ранее, по проведенным сейсморазведочным работам 2D и данным бурения, на площади были выявлены и подготовлены к бурению газовые залежи в пермско-триасовом комплексе. С целью доизучения и детализации структурно-тектонического строения площади были проведены сейсморазведочные работы 3D, в результате которых было установлено блоковое строение площади и детализировано строение перспективных и потенциально перспективных этажей. Сейсмическое волновое поле характеризуется наличием «ярких пятен», обусловленных контрастом физических параметров углей и газоносных песчаников во вмещающих породах пермско-триасового и мелового комплексов, в связи с чем была поставлена задача проведения комплексного анализа с целью разделения аномалий «уголь» – «газ» и выявления газовых залежей. В данной статье приводится технология проведения атрибутного AVO-анализа с использованием петрофизических трендов, установленных по диаграммам каротажа в интервалах мела и верхней перми, обоснование выделения аномалий, вызванных ловушками УВ.
Автор – Феоктистова О.В.
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