| Autor: |
G.Z. Zhang, J.J. Zhang, L.H. Huang, X.Y. Yin |
| Rok vydání: |
2017 |
| Předmět: |
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| Zdroj: |
Proceedings. |
| ISSN: |
2214-4609 |
| DOI: |
10.3997/2214-4609.201701192 |
| Popis: |
Summary Understanding stress dependency of elastic anisotropy is of great interest to the interpretation of four-dimensional (4D) seismic data, the identification of the fluid content and underground storage monitoring. A normalized fourth-rank tensor is presented for the first time that incorporates the information on the fluid content, orientation and the geometry of crack-like pores. In the case of a general transversely isotropic distribution of micro-cracks, we also present a new indicator to discriminate between dry and saturated cracks. The analysis of the Callovo-Oxfordian shale data using these two parameters allows some insight into the fluid content in cracks and the microstructural changes during compression. We observe that changes of the crack density tensors in the wet sample are significantly larger than those in the dry one. It is worth emphasizing that properties of the fluid content recovered from these two parameters are consistent with each other and considerably reasonable. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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