Modeling and imaging of multiply generated and scattered tube waves due to multiple hydraulic fractures

Shohei Minato, Ranajit Ghose, Takeshi Tsuji, Michiharu Ikeda, Kozo Onishi

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

Although tube-wave generation and tube-wave scattering in VSP experiments are extensively used to detect and character- ize subsurface hydraulic fractures (i.e., open fractures and/or permeable layers), the majority of the earlier studies consider only single generation and single scattering (reflection and transmission) responses. We formulate a new integral equa- tion which represents total tube wavefield including multiple reflection, transmission and generation due to multiple frac- tures. The accurate prediction of the complex signatures of total tube wavefield is crucial for further characterizing the hy- draulic properties of highly-fractured areas, such as a fault- damaged zone. Deriving the integral equation further enables us to develop a new approach to imaging and characterizing hydraulic fractures. We numerically show that the proposed in- tegral equation can be used to predict the total tube wavefield. A spatial-focusing analysis is useful to identify the positions of the hydraulic fractures. We applied the developed theory to field VSP data obtained at a fault-damaged zone in the Median Tectonic Line, Shikoku, Japan. Our preliminary result shows evidence that tube waves are generated and scattered at open fractures and thin layers of the cataclasites at this field.

Original languageEnglish
Pages (from-to)682-687
Number of pages6
JournalSEG Technical Program Expanded Abstracts
Volume35
DOIs
Publication statusPublished - Jan 1 2016
EventSEG International Exposition and 86th Annual Meeting, SEG 2016 - Dallas, United States
Duration: Oct 16 2011Oct 21 2011

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hydraulics
Hydraulics
tubes
Imaging techniques
fault zone
modeling
Integral equations
cataclasite
integral equations
wave scattering
wave generation
hydraulic property
spatial analysis
scattering
Scattering
tectonics
Tectonics
prediction
hydraulic fracturing
Japan

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Geophysics

Cite this

Modeling and imaging of multiply generated and scattered tube waves due to multiple hydraulic fractures. / Minato, Shohei; Ghose, Ranajit; Tsuji, Takeshi; Ikeda, Michiharu; Onishi, Kozo.

In: SEG Technical Program Expanded Abstracts, Vol. 35, 01.01.2016, p. 682-687.

Research output: Contribution to journalConference article

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