Sercel says that its recently launched downhole seismic array tool, GeoWave® II, broke temperature records during field trials.
Specially designed for deployment in high-pressure wells with high temperatures of up to 400°F/205°C, GeoWave II has proven its capability for continuous data acquisition in a deep hot well at 362°F/183.5°C.
During field trials in northeastern France, the 16-level GeoWave II system was deployed in a 5,000-meter deep well in the presence of a major international service company. GeoWave II recorded multiple VSP shots with repeatable VSP data, both in open and cased holes, as well as high-frequency microseismic events at different sampling rates, including 0.25 ms.
This performance represents the world’s first borehole seismic survey to be acquired with a digital tool over a long duration in temperatures of above 347°F/175°C. The GeoWave II’s successful deployment follows on from a positive market response to the tool’s innovative features and unique specifications, enabling it to push back the boundaries of borehole seismic beyond its historical limits in terms of temperature, array length and flexibility of deployment.