Schlumberger released three new technologies to work in conjunction with WesternGeco’s Q-Technology services. The Dynamic Spread Control, a new, automated vessel-control system developed for offshore surveys, provides source and streamer steering technology. According to field tests in the Gulf of Mexico, the new technique increased accuracy and repeatability for 4-D time-lapse studies as well as Q enabled over/under and wide-azimuth surveys. The platform consists of steerable streamers, single-sensor acquisition, dense acoustic positioning network and calibrated marine sources. The Desert Explorer DX-80 vibroseis unit complements land integrated acquisition and processing. The unit generates low distortion across a broad bandwidth with an 80,000-pound peak hydraulic force. The MD Sweep’s design uses a vibrator to produce more energetic low frequencies as opposed to traditional sweep design approach. The system prevents lower frequencies from being overlooked due to attenuation by conventional geophones. According to field tests the new system extends bandwidth by half an octave with the vibrator operating at full power. “Seismic data with rich low-frequency content are essential to improve the resolution of deeper targets for structural imaging and successful data inversion to reservoir properties,” said Mark O’Byrne, vice president, WesternGeco.

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