Fracture properties estimation in unconventional reservoirs using seismic DAS records

A. Lellouch, M. Meadows, T. Nemeth, B. Biondi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We analyze perforation shots recorded by a downhole DAS array. These sources induce guided waves, which propagate in a low-velocity shale reservoir. They are dispersive and contain a broad frequency content, reaching up to 700 Hz. They are especially valuable in a horizontal cross-well configuration, in which case they propagate through previously stimulated areas. Guided S-waves are very sensitive to the presence of fluid-filled fractures. P-waves undergo a slowdown but are overall less affected. Using simple geometrical considerations, we can estimate the horizontal extent of the fracture system. It shows considerable spatial variability, indicating that stimulation effects are not constant. This study is the first large-scale use of guided waves recorded by DAS. They hold tremendous potential for high-resolution imaging and inversion of subsurface properties before and after stimulation. As such, they open new possibilities for the use of seismology in optimizing unconventional hydrocarbon recovery.

Original languageEnglish
Title of host publication1st EAGE Workshop on Fibre Optic Sensing
PublisherEuropean Association of Geoscientists and Engineers, EAGE
ISBN (Electronic)9789462823303
StatePublished - 2020
Externally publishedYes
Event1st EAGE Workshop on Fibre Optic Sensing 2020 - Amsterdam, Netherlands
Duration: 9 Mar 202011 Mar 2020

Publication series

Name1st EAGE Workshop on Fibre Optic Sensing

Conference

Conference1st EAGE Workshop on Fibre Optic Sensing 2020
Country/TerritoryNetherlands
CityAmsterdam
Period9/03/2011/03/20

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Geotechnical Engineering and Engineering Geology

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