Shear-wave crosswell reflection imaging in west Texas
- TomoSeis Inc., Houston, TX (United States)
- Chevron Petroleum Technology, La Habra, CA (United States)
- Stanford Univ., CA (United States)
Crosswell reflection imaging was recently introduced as a method for high-resolution (of the order of a few feet) imaging of reservoirs. P-wave imaging was successfully tested on short and intermediate-offset crosswell profiles. Although shear-wave imaging was demonstrated with a short-offset (187 feet) data set, it was generally believed that high-frequency shear imaging at larger interwell distances might not be feasible, because the high-frequency shear waves will suffer large attenuation losses, resulting in poor signal-to-noise ratios for the shear-wave reflections. In this paper the authors present a real-data study, illustrating that shear-wave imaging was feasible at a west Texas carbonate reservoir for an interwell distance of 586 feet. Although the shear direct arrival and reflections are not always evident in the raw gathers processing and stacking enhances them enough to allow imaging of the interwell area for the whole depth range covered by the survey. The results clearly indicate that further work on shear-wave crosswell reflection imaging is warranted.
- OSTI ID:
- 80213
- Report Number(s):
- CONF-941015--
- Country of Publication:
- United States
- Language:
- English
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