Vertical seismic profiling at Borehole B-1015, Lawrence Livermore National Laboratory: Motivation, data acquisition, data analysis, and formation velocities
- Lawrence Livermore National Lab., CA (United States)
- California Univ., Berkeley, CA (United States)
The initial goal of the three-dimensional (3-D) vertical seismic profiling (VSP) at Lawrence Livermore National Laboratory (LLNL) was to characterize seismic wave velocities and frequencies below the vadose zone in order to design the acquisition geometry for a high-resolution 3-D seismic reflection survey. VSPs are also used routinely to link surface seismic data with well logs. However, a test of the two-dimensional (2-D) seismic line recorded at the LLNL Livermore Site in the spring of 1994 indicated that obtaining high-quality reflection images below the vadose zone, but shallower than about 160 ft, would require an expensive, very finely sampled survey ({gt} 1-m receiver spacing). This paper presents the difficulties encountered during initial data acquisition and processing, and attempts to alleviate the difficulties in the field and laboratory.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 514894
- Report Number(s):
- UCRL-ID-122555; ON: DE97053430
- Resource Relation:
- Other Information: PBD: 30 Jan 1997
- Country of Publication:
- United States
- Language:
- English
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