Experimental study of open-hole hydraulic fracturing as a stress measurement method--with particular emphasis on field tests
Thesis/Dissertation
·
OSTI ID:5720299
The process of hydraulic fracturing has found a variety of applications in areas outside the petroleum industry, since its introduction. One of these areas, for which open-hole fracturing shows great potential, is the field of in situ stress measurement. Special equipment suitable for fracturing in 2-1/4 in. diam boreholes was developed. The bottom-hole pressure was recorded with the aid of a pressure transducer, and the fracture orientation determined by means of an impression packer. The tests were conducted close to the surface in a quarry as well as in 3 locations, 1,100, 1,000, and 500 ft underground. The rock in which the tests were performed had negligible permeability when tested in the standard manner. The far-field stresses were calculated from the breakdown pressure obtained in the fracturing tests and the rupture strength of the rock taking into account the influence of the underground excavations. The results are in good agreement with previous laboratory experiments on hydraulic fracturing described in the literature.
- OSTI ID:
- 5720299
- Country of Publication:
- United States
- Language:
- English
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