On Permeability Estimation from Borehole Acoustic and Electromagnetic Flexural Waves

Авторы: Nikitin A.A., Plyushchenkov B.D.
Сборник: сборник трудов международной конференции "Sixth Biot Conference on Poromechanics"
Год издания: 2017
Место издания: American Society of Civil Engineers
Первая страница: 1224
Последняя страница: 1231
DOI: 10.1061/9780784480779.152
Аннотация: Electromagnetic field excites acoustic field in a porous elastic medium saturated with fluid electrolyte due to electrokinetic conversion effect. Our solution of finite-difference equations, obtained from Pride’s equations describing this process, showed that acoustic field consists of the same types of waves as in the process of traditional acoustic logging plus fast wave, which propagates almost instantly. Amplitude of this wave is sensitive to the formation permeability and can be registered, if proper electric emitter is used. Modified Pride’s equations, which take into account the effect of Joule heating on the propagation of acoustic waves, are used in this work. It follows from numerical results that Joule heating can make significant contribution to the acoustic field.
Добавил в систему: Никитин Анатолий Алексеевич

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