You need JavaScript to view this

Characterization and interpretation of a fractured rocky massif from borehole data. Boreholes of geothermal project at Soultz-sous-Forets and other examples of unidirectional sampling; Caracterisation et interpretation d`un volume rocheux fracture a partir de donnees de forages. Les forages geothermiques de Soultz-sous-Forets et autres exemples d`echantillonnages unidirectionnels

Abstract

In this thesis, we study fractures from borehole data on two sites: in one, located at Soultz-sous-Forets (Alsace) in the Rhine graben, boreholes reach a delta Jurassic series forming a petroleum reservoir. At Soultz, fractures have been studied on cores and borehole images. Striated faults present on cores permit to determine the tectonic history of the granite, completed by field study in Vosges Massif. This history corresponds to the Rhine graben history knowing by different authors. The analysis of vertical induced fractures observed on borehole images indicates a present-day NW-SE to NNW-SSE compression. These variations of stress direction are confirmed by others in situ measurements, as hydraulic injection, micro-seismicity, etc... On cores and borehole images, numerous fractures have been observed. Most of them are linked to the E-W distension, which permits the Rhine graben opening at Oligocene. At greatest scale, in quartz minerals, the micro-fractures are constitute by fluid inclusion trails. Several sets are related to the E-W distension, but others sets are linked to compressive stages. These sets are not observed on cores. This is a under-sampling of some fractures by the boreholes, but theses fractures exit into to rock massif. On borehole images, fracture density is weakest than  More>>
Authors:
Publication Date:
Dec 18, 1995
Product Type:
Thesis/Dissertation
Report Number:
FRNC-TH-4038
Reference Number:
SCA: 150200; 440400; 580000; PA: FRC-97:003255; EDB-97:105919; NTS-98:000096; SN: 97001792542
Resource Relation:
Other Information: TH: These (D. es Sc.); PBD: 18 Dec 1995
Subject:
15 GEOTHERMAL ENERGY; 44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; 58 GEOSCIENCES; GEOLOGIC FRACTURES; BOREHOLES; FLUID FLOW; VOLUME; GRANITES; GEOTHERMAL FLUIDS; GEOTHERMAL FIELDS; RHINE RIVER; HOT-DRY-ROCK SYSTEMS; GEOTHERMAL WELLS; RIVER DELTAS; JURASSIC PERIOD; OIL FIELDS; SANDSTONES; CLAYS; SEISMIC SURVEYS; ACOUSTIC MEASUREMENTS; DRILL CORES; GAMMA LOGGING; CALIPER LOGGING; DIPMETER LOGGING; STRESSES; TECTONICS; INCLUSIONS; ORIENTATION; STRESS RELAXATION; MARLSTONE; UNITED KINGDOM; RESERVOIR ROCK; GEOLOGIC FISSURES
OSTI ID:
508835
Research Organizations:
Savoie Univ., 73 - Chambery (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
Other: ON: DE97749201; TRN: FR9703255
Availability:
OSTI as DE97749201
Submitting Site:
FR
Size:
297 p.
Announcement Date:

Citation Formats

Dezayes, CH. Characterization and interpretation of a fractured rocky massif from borehole data. Boreholes of geothermal project at Soultz-sous-Forets and other examples of unidirectional sampling; Caracterisation et interpretation d`un volume rocheux fracture a partir de donnees de forages. Les forages geothermiques de Soultz-sous-Forets et autres exemples d`echantillonnages unidirectionnels. France: N. p., 1995. Web.
Dezayes, CH. Characterization and interpretation of a fractured rocky massif from borehole data. Boreholes of geothermal project at Soultz-sous-Forets and other examples of unidirectional sampling; Caracterisation et interpretation d`un volume rocheux fracture a partir de donnees de forages. Les forages geothermiques de Soultz-sous-Forets et autres exemples d`echantillonnages unidirectionnels. France.
Dezayes, CH. 1995. "Characterization and interpretation of a fractured rocky massif from borehole data. Boreholes of geothermal project at Soultz-sous-Forets and other examples of unidirectional sampling; Caracterisation et interpretation d`un volume rocheux fracture a partir de donnees de forages. Les forages geothermiques de Soultz-sous-Forets et autres exemples d`echantillonnages unidirectionnels." France.
@misc{etde_508835,
title = {Characterization and interpretation of a fractured rocky massif from borehole data. Boreholes of geothermal project at Soultz-sous-Forets and other examples of unidirectional sampling; Caracterisation et interpretation d`un volume rocheux fracture a partir de donnees de forages. Les forages geothermiques de Soultz-sous-Forets et autres exemples d`echantillonnages unidirectionnels}
author = {Dezayes, CH}
abstractNote = {In this thesis, we study fractures from borehole data on two sites: in one, located at Soultz-sous-Forets (Alsace) in the Rhine graben, boreholes reach a delta Jurassic series forming a petroleum reservoir. At Soultz, fractures have been studied on cores and borehole images. Striated faults present on cores permit to determine the tectonic history of the granite, completed by field study in Vosges Massif. This history corresponds to the Rhine graben history knowing by different authors. The analysis of vertical induced fractures observed on borehole images indicates a present-day NW-SE to NNW-SSE compression. These variations of stress direction are confirmed by others in situ measurements, as hydraulic injection, micro-seismicity, etc... On cores and borehole images, numerous fractures have been observed. Most of them are linked to the E-W distension, which permits the Rhine graben opening at Oligocene. At greatest scale, in quartz minerals, the micro-fractures are constitute by fluid inclusion trails. Several sets are related to the E-W distension, but others sets are linked to compressive stages. These sets are not observed on cores. This is a under-sampling of some fractures by the boreholes, but theses fractures exit into to rock massif. On borehole images, fracture density is weakest than the cores, however the set organisation is the same. At Ravenscar, the distribution of fracture spacing along different unidirectional sampling shows a exponential negative law. However, the fracture density varies with sampling. (author) 199 refs.}
place = {France}
year = {1995}
month = {Dec}
}