Revolution in Oil and Gas Exploration: The Rise of 3D Seismic Surveys

As the global oil price environment remains low, oil exploration companies are looking for innovative ways to reduce costs and maximize efficiency. One crucial area of focus is seismic operations, where the transition from 2D to 3D data acquisition has transformed the value and status of seismic operations. The introduction of high-volume 3D seismic surveys, made possible by advanced vessels like the $85m Schlumberger Geco-Prakla's Geco Eagle, has significantly improved data quality and reduced costs. For instance, a 3D survey can now be conducted for around $3,000 per km2, down from $15,000 per km2 in the late 1980s. This shift is having a profound impact on the oil and gas exploration industry, with seismic operations now accounting for a larger proportion of E&P budgets.

Key Takeaways:

The cost of 3D seismic surveys has decreased dramatically, from $15,000 per km2 in the late 1980s to $3,000 per km2 today, thanks to advancements in technology and vessel design.
The introduction of high-volume 3D seismic surveys has enabled oil exploration companies to acquire millions of lines of data, which can be used to identify potential hydrocarbon reserves.
The deployment of 10 streamers, each 6km in length, by the Geco Eagle has improved data coverage, with 76,000 hydrophones used to catch seismic energy waves as they arrive from below.
Companies like Western Geophysical and PGS have developed solid floating cables, which have saved up to $1m per year per vessel in cable repairs and offered a quieter, more robust streamer for data recording.
The turnaround time for seismic data acquisition has been reduced from 12 to 18 months to three to five months, thanks to onboard data processing and satellite communications.
The use of advanced visualization tools, such as VisonDome, Reality Centre, and Decisionarium, has enhanced the ability of oil companies to assess geological structures and make better decision-making.
PGS, founded in 1991, has revolutionized marine seismic operations with its Ramforms, delta-shaped vessels that can tow up to 12 streamers, increasing productivity and enabling high-volume 3D seismic surveys.
The industry's reluctance to invest in 4D seismic technology, which involves repeated 3D surveying of the same area over time to track fluid changes in a reservoir, could lead to missed opportunities for enhanced recovery.

Statistics:

50 marine seismic vessels capable of acquiring high volumes of 3D data are operating worldwide.
The cost of a 3D survey has decreased from $15,000 per km2 in the late 1980s to $3,000 per km2 today.
The Geco Eagle is equipped with 10 streamers, each 6km in length, and 76,000 hydrophones.
Western Geophysical estimates that solid floating cables have saved up to $1m per year per vessel in cable repairs.
The turnaround time for seismic data acquisition has been reduced from 12 to 18 months to three to five months.
PGS has built six Ramforms, delta-shaped vessels, since its inception in 1991.

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