Численное моделирование волновых процессов в трещиновато-пористых флюидозаполненных средах
Авторы
-
М.А. Новиков
-
В.В. Лисица
-
А.А. Козяев
Ключевые слова:
уравнения Био
конечно-разностные схемы
сейсмические волны
трещиновато-пористые среды
поглощение сейсмической энергии
связность трещин
Аннотация
Одной из актуальных задач современной прикладной геофизики является выделение характерных признаков наличия развитой трещиноватости в пласте по сейсмическим данным. Более того, необходимо выделять флюидозаполненные системы трещин, образующих связанную систему трещин, способную обеспечивать достаточную гидродинамическую проницаемость резервуара. В настоящей статье представлен численный алгоритм расчета волновых полей в трещиноватых пороупругих средах, основанный на конечно-разностной аппроксимации уравнений Био. На основе численных экспериментов показано, что связность трещин, т.е. наличие систем пересекающихся трещин, существенно повышает поглощение сейсмической энергии, что обусловлено возникновением локальных потоков флюида внутри трещин. Приводится детальный частотный анализ затухания сейсмических волн и обусловленной этим дисперсии.
Раздел
Раздел 1. Вычислительные методы и приложения
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