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Deliverable D4.3: Report on stability of laterals

Authors

Bakker,  Richard
External Organizations;

/persons/resource/ckluge

Kluge,  Christian
4.8 Geoenergy, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/bloech

Blöcher,  G.
4.8 Geoenergy, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/dbruhn

Bruhn,  David
4.8 Geoenergy, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Barnhoorn,  Auke
External Organizations;

External Ressource
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Fulltext (public)

SURE D4.3_pub.pdf
(Publisher version), 2MB

Supplementary Material (public)
There is no public supplementary material available
Citation

Bakker, R., Kluge, C., Blöcher, G., Bruhn, D., Barnhoorn, A. (2019): Deliverable D4.3: Report on stability of laterals, Potsdam : GFZ German Research Centre for Geosciences, 21 p.
https://doi.org/10.2312/GFZ.4.8.2019.005


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_4315893
Abstract
Based on the aviailable material we come to the conclusion that jetting has no direct influence on the surrounding area. Analysis on multiple scales: μm (porosity); cm (mechanical and acoustical properties); dm scale (elastic properties with and without a jetted hole) do not show a significant changes compared to in-tact material, nor can a significant change be detected with respect to distance to a jetted hole. Results fall within the intra-block variability, and differences between blocks can be well explained by block-to-block variation. True-triaxial elastic deformation tests have been designed and ran to test the effect of a lateral (jetted hole) on the elastic properties. The jetted hole itself was jetted with a rotating nozzle type, producing cilindrical holes. Comparing laboratory tests with a numerical model proved that the laboratory results may be well compared to a model with cylindrical hole embedded in a rock mass, much like a conventional borehole. The stress field around the jetted hole can therefore be well aproximated by the Kirsh-equations, modified for compression.