Deep Borehole Operation of the Borehole Seismometer System, Model 36000.
Abstract
The project described was concerned primarily with, first, the modification of the Borehole Seismograph System, Model 36000, to operate under the high pressure and high temperature environment encountered in boreholes up to 3000 m (10,000 ft) deep, and secondly, various studies of signals and noise as a function of depth. Modification of the instrument, along with required auxiliary equipment was relatively straightforward and consisted primarily of substitution of high-reliability, 105C components for some of the standard units in the electronics sections. Actual operations were carried out at a deep borehole site near Pinedale, Wyoming during the period from April through December 1974. Data from three different long-period (LP) seismographs were recorded for analysis - a conventional surface LP system using 10 kg mass seismometers and galvanometer-phototube amplifiers, a standard Model 36000 at a fixed depth of 46 m (150 ft) and a deep-hole Model 36000 at various depths from 46 m to 914 m (3000 ft).
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 15, 1975
- Accession Number
- ADA015849
Entities
People
- E. J. Douze
- John R. Sherwin
Organizations
- Teledyne Technologies