Borehole Gravity Measurements In The Salton Sea Scientific Drilling Program Well State 2-14
Borehole gravity measurements over a depth range from 1737 to 1027 m, and the vertical gradient of gravity were measured at the Salton Sea Scientific Drilling Program well State 2-14. The borehole gravimetric densities matched the well logs, but the surface gradient was found to be 0.0040 mgal/m higher than expected. When the borehole observations are corrected for the observed free air gradient above ground, they produce densities which are nearly uniformly higher than log densities by about 0.07 gm/cm{sup 3}. These measurements require densities in the depth range .5 to 3 km, for a radius of a few kilometers around State 2-14 to be as dense as those found in State 2-14. Combining the borehole gravity and calculated vertical gravity gradients on the surface, we find that this densified zone covers much of a broad thermal anomaly to the northeast of the Salton Sea Geothermal Field.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-Eng-48
- OSTI ID:
- 882029
- Report Number(s):
- UCRL-97433; TRN: US200613%%589
- Country of Publication:
- United States
- Language:
- English
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