What does a tensiometer measure in fractured rock?
Conference
·
OSTI ID:645589
Tensiometers are routinely used in both the laboratory and the field for measuring the capillary pressure in unsaturated porous media. The authors conducted a laboratory experiment on a fractured basalt core. They also examined the performance of a tensiometer in fractured porous media by means of numerical simulation, in which the tensiometer itself and its interaction with the formation were explicitly modeled. They conclude that the gauge pressure is primarily affected by the fracture rock component fracture or matrix that conducts water into or out of the ceramic cup of the tensiometer. Fracture flow is accurately monitored during imbibition events, whereas during drainage, the matrix capillary pressure is registered, leading to a strong hysteretic behavior in the pressure measurements.
- Research Organization:
- Lawrence Berkeley National Lab., CA (United States)
- Sponsoring Organization:
- USDOE Office of Environmental Restoration and Waste Management, Washington, DC (United States)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 645589
- Report Number(s):
- LBNL--41454; CONF-9710205--; ON: DE98052894
- Country of Publication:
- United States
- Language:
- English
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