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Tube Waves Excitation In A Well, Intersected By Finite Size Fracture, Under Action Of External Seismic Wave
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, VII Annual International Conference and Exhibition - Galperin Readings 2007, Oct 2007, cp-180-00005
- ISBN: 978-94-6282-089-0
Abstract
The problem on tube waves excitation in a well, intersected by thin fluidfilled fracture under action of external seismic wave is considered in the report. This situation arises in VSP practice at hydro-fracturing. Based on averaging procedure the non-uniform pseudo-differential wave equation for slow eigen mode in fluid-filled fracture is derived in space-time representation for the long wave approximation by fracture opening. Numerical calculations show that high dispersive slow eigen mode is excited by fracture edges. This mode generates additional tube waves in a well. Registration of these tube waves can be used for fracture size characterization.