The role of rock anisotropy in hydraulic fracturing through acoustic emission

The role of rock anisotropy in hydraulic fracturing through acoustic emission

Recently, a large variety of different aspects-features of the set-up of the hydraulic fracturing (HF) has been investigated. The texture anisotropy and/or crack anisotropy have a great influence over the effective mechanical properties of rocks and the way of their fracturing and failure. We believe that the influence of texture and/or crack anisotropy, as a characteristic property of most of the rocks, deserves to be studied in greater detail. The proposed project is a joint study concerning laboratory HF experiments and application of advanced seismological methods to registered acoustic emission. The HF will be performed on the rock analogue of anisotropic mica schist from research geothermal center at the Litoměřice site, Czech Republic. The stress conditions will be simulating the actual test site at the depth of 1 km. The advanced seismological methods will be implemented to anisotropic conditions and applied to detail analysis of registered acoustic emission. This research will lead to a better understanding of the role of the rock texture/crack anisotropy on the HF.

Grant No.

GA22-00580S

Grant Agency

The Czech Science Foundation (GACR)

Resolved in

2022-2024

Principal investigator

Ing. Tomáš Lokajíček, CSc.
Geological Institute of the  CAS 
(Institute of Rock Structure and Mechanics of the CAS, since 1.1.2024)

 

 

Co-investigators

RNDr. Jan Šílený, CSc. 
Institute of Geophysics of the CAS

State
Current