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- Title
Fracture Flow Characterization with Low‐Noise Spontaneous Potential Logging.
- Authors
Kowalski, André C.G.; Mendonça, Carlos A.; Ofterdinger, Ulrich S.
- Abstract
Geophysical well logging has been applied for fracture characterization in crystalline terrains by physical properties measurements and borehole wall imaging. Some of these methods can be applied to monitor pumping tests to identify fractures contributing to groundwater flow and, with this, determine hydraulic conductivity and transmissivity along the well. We present a procedure to identify fractures contributing to groundwater flow using spontaneous potential measurements generated by electrokinetic processes when the borehole water head is lowered and then monitored while recovering. The electrokinetic model for flow through a tabular gap is used to interpret the measured data and determine the water head difference that drives the flow through the fracture. We present preliminary results at a test site in crystalline rocks on the campus of the University of São Paulo. Article Impact Statement: This research identifies fractures contributing to groundwater flow and estimate their hydraulic heads using spontaneous potential logging.
- Subjects
UNIVERSIDADE de Sao Paulo; GEOPHYSICAL well logging; HYDRAULIC conductivity; GROUNDWATER flow; CRYSTALLINE rocks; LOGGING equipment; PHYSICAL measurements
- Publication
Ground Water, 2021, Vol 59, Issue 1, p16
- ISSN
0017-467X
- Publication type
Article
- DOI
10.1111/gwat.13009