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Precise, reliable and cost-effective data onshore and offshore.
Technology
While measurements with precision down to one μGal (one μGal is 10–8 ms–2) have been obtained at laboratory conditions for decades (e.g., Torge, 1989), recent advances have made it practically possible to carry out field surveys at such accuracy, and stationary measurement at sub-μGal precision. This increases the potential applications of gravity to smaller and deeper targets, with lower density contrasts and monitoring over shorter time-lapse intervals.
On land, subsidence or uplift can be measured with a few mm precision by InSAR, GPS or optical levelling. Deformations can also be accurately measured by tiltmeters or strain meters. Optical or electromagnetic signals hardly penetrate to the seafloor, and the tilt/strain methods require further R&D – both on land and at sea – to find practical and economical applications. At the seafloor, water pressure can be a precise proxy for depth.
Industry news
The SHAPE-project shall improve data processing and describe uncertainties in a better way. This may enlighten important aspects of CO2-injection and storage.
The Northern Endurance Partnership has through BP awarded Quad Geometrics a Gravity and Subsidence modelling (feasibility) study for the CO2 injection and storage project in the UK sector of the North Sea. The study will be concluded mid- 2024.
We are a small and dedicated team specialising in the technology of high-precision gravity and height measurements for a wide range of subsurface applications. From our base in Trondheim, Norway we provide services around the world. This can be either field measurements, data analysis or full project responsibility.
