Capstone — Middle East land nodal mega survey

Part 10 — Real-field capstones

Learning objectives

Quote shot- and receiver-density for modern Gulf dense land 3D
Compute crew day-count from parallel-crew productivity
Recognise Haradh (Aramco, 2015–2018) as the reference case
Link dense sampling to horizontal-well infill-drilling decisions

Saudi Aramco’s Haradh and Khurais mega-3D programmes (2015–2018, 2019–2021) set the benchmark for modern dense land 3D. The target: 250+ fold at ≤12.5 m bins across thousands of km², to inform horizontal-well infill drilling in producing fields with compaction and water-breakthrough challenges.

Receiver density

Nodal receivers on a 25 m inline × 50 m crossline grid → 800 channels/km². For a 2500 km² survey, that is 2 million channels. Rental-grade nodes at ~ $2k each (amortised per survey) + install/retrieval cost brings node-hardware total to$ 40–$80M per mega-survey. Sercel WiNG, INOVA Hawk, and WesternGeco UniQ dominate the market.

Shot density + crews

Vibroseis trucks in slip-sweep configuration deliver ~12 k VPs/day/crew at 12.5 m shot spacing. Four crews in parallel → ~50 k VPs/day. A 2500 km² / 12.5 m² bin survey needs about 10 million VPs, or roughly 200 crew-days / 4 = 50 calendar days of shooting — but the full programme runs 6–18 months end-to-end including permitting, camp logistics, node installation, and retrieval.

Cost and purpose

Total programme $150–$ 350M. Justification: each horizontal development well in a giant field costs $10–30M; a 2–4% drilling-success-rate uplift from better near-target imaging breaks even on hundreds of wells. For fields already producing a million barrels/day, even 0.5% better sweep efficiency is$ 1B+ of additional recoverable reserves.

References

Cordsen, A., Galbraith, M., Peirce, J. (2000). Planning Land 3-D Seismic Surveys. SEG Geophysical Developments 9.
Vermeer, G. J. O. (2002). 3-D Seismic Survey Design. SEG Geophysical References 12.
Berg, E., Svenning, B., Martin, J. (2010). OBN technology — recent developments. EAGE Workshop on Permanent Reservoir Monitoring.
Mougenot, D. (2013). MEMS-based 3C accelerometers for land seismic acquisition. The Leading Edge, 32(4), 388–396.