Seismic reflectivity of hydraulic fractures approximated by thin fluid layers
We have analyzed the angle-dependent reflectivity of microseismic wavefields at a hydraulic fracture, which we modeled as an ideal thin fluid layer embedded in an elastic, isotropic solid rock. We derived full analytical solutions for the reflections of an incident P-wave, the P-P and P-S reflection...
| Main Authors: | , , , , , , , , |
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| Format: | Journal Article |
| Published: |
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/15011 |
| _version_ | 1848748778452942848 |
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| author | Oelke, A. Alexandrov, D. Abakumov, I. Glubokovskikh, Stanislav Shigapov, R. Krüger, O. Kashtan, B. Troyan, V. Shapiro, S. |
| author_facet | Oelke, A. Alexandrov, D. Abakumov, I. Glubokovskikh, Stanislav Shigapov, R. Krüger, O. Kashtan, B. Troyan, V. Shapiro, S. |
| author_sort | Oelke, A. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We have analyzed the angle-dependent reflectivity of microseismic wavefields at a hydraulic fracture, which we modeled as an ideal thin fluid layer embedded in an elastic, isotropic solid rock. We derived full analytical solutions for the reflections of an incident P-wave, the P-P and P-S reflection coefficients, as well as for an incident S-wave, and the S-S and S-P reflection coefficients. The rather complex analytical solutions were then approximated and we found that these zero-thickness limit approximations are in good agreement with the linear slip model, representing a fracture at slip contact. We compared the analytical solutions for the P-P reflections with synthetic data that were derived using finitedifference modeling and found that the modeling confirmed our theoretical results. For typical parameters of microseismic monitoring by hydraulic fracturing, e.g., a layer thickness of h = 0.001-0.01 m and frequencies of f = 50-400 Hz, the reflection coefficients depend on the Poisson's ratio. Furthermore, the reflection coefficients of an incident S-wave are remarkably high. Theoretical results suggested that it is feasible to image hydraulic fractures using microseismic events as a source and to solve the inverse problem, that is, to interpret reflection coefficients extracted from microseismic data in terms of reservoir properties. |
| first_indexed | 2025-11-14T07:10:27Z |
| format | Journal Article |
| id | curtin-20.500.11937-15011 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:10:27Z |
| publishDate | 2013 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-150112017-09-13T15:02:12Z Seismic reflectivity of hydraulic fractures approximated by thin fluid layers Oelke, A. Alexandrov, D. Abakumov, I. Glubokovskikh, Stanislav Shigapov, R. Krüger, O. Kashtan, B. Troyan, V. Shapiro, S. We have analyzed the angle-dependent reflectivity of microseismic wavefields at a hydraulic fracture, which we modeled as an ideal thin fluid layer embedded in an elastic, isotropic solid rock. We derived full analytical solutions for the reflections of an incident P-wave, the P-P and P-S reflection coefficients, as well as for an incident S-wave, and the S-S and S-P reflection coefficients. The rather complex analytical solutions were then approximated and we found that these zero-thickness limit approximations are in good agreement with the linear slip model, representing a fracture at slip contact. We compared the analytical solutions for the P-P reflections with synthetic data that were derived using finitedifference modeling and found that the modeling confirmed our theoretical results. For typical parameters of microseismic monitoring by hydraulic fracturing, e.g., a layer thickness of h = 0.001-0.01 m and frequencies of f = 50-400 Hz, the reflection coefficients depend on the Poisson's ratio. Furthermore, the reflection coefficients of an incident S-wave are remarkably high. Theoretical results suggested that it is feasible to image hydraulic fractures using microseismic events as a source and to solve the inverse problem, that is, to interpret reflection coefficients extracted from microseismic data in terms of reservoir properties. 2013 Journal Article http://hdl.handle.net/20.500.11937/15011 10.1190/GEO2012-0269.1 restricted |
| spellingShingle | Oelke, A. Alexandrov, D. Abakumov, I. Glubokovskikh, Stanislav Shigapov, R. Krüger, O. Kashtan, B. Troyan, V. Shapiro, S. Seismic reflectivity of hydraulic fractures approximated by thin fluid layers |
| title | Seismic reflectivity of hydraulic fractures approximated by thin fluid layers |
| title_full | Seismic reflectivity of hydraulic fractures approximated by thin fluid layers |
| title_fullStr | Seismic reflectivity of hydraulic fractures approximated by thin fluid layers |
| title_full_unstemmed | Seismic reflectivity of hydraulic fractures approximated by thin fluid layers |
| title_short | Seismic reflectivity of hydraulic fractures approximated by thin fluid layers |
| title_sort | seismic reflectivity of hydraulic fractures approximated by thin fluid layers |
| url | http://hdl.handle.net/20.500.11937/15011 |