OBS Exploration and Sparse Receiver

Some parts of many of the world’s basins are still underexplored primarily because (sometimes, several generations of) towed marine have failed to address the geophysical challenges sufficiently to reduce risk to acceptable levels. Whilst towed marine is an excellent and low cost option in many areas (particularly when combined with Source Isolation®), some areas require either a full 3D approach or the data confidence that only full azimuth illumination and/or the addition of geophone data can address. For these areas, the options have historically been wide azimuth towed marine combined with highly targeted small OBS projects – which, taken together, is a significant cost.

Now, OBS combined with Source Isolation® and Source Revolution™ addresses that conflict. Full fold, full-band, reservoir quality data is always at hand. And by deploying four, six or even up to 9 or more sources together, the source bottleneck has gone forever. With today’s highly automated and efficient node crews that means that productivity can be close to wide-azimuth towed with the advantage of pz data and even better illumination.

GoM ultra-low frequencies with ambient noise
  • Full-fold, reservoir quality OBS data allows better prospect ranking and development scenario planning from the initial survey
  • Increasing source multiplicity allows more use to be made of node channels
  • Double, triple or more productivity gains on the source side shorten projects to within the battery life of nodes on a single deployment
  • Sparse receiver options combined with Source Revolution (SR2) in areas where the challenge is illumination below salt or basalt provides a very cost effective solution for large frontier exploration and FWI projects