Naslov
Development of a neutron probe for Carbon-to- Oxygen (C/O) oil logging equipped with a high- temperature alpha particle detector

Autori
Sudac, Davorin ; Valković, Vladivoj ; Nađ, Karlo ; Orlić, Željko ; Uroić, Milivoj ; Batur, Josip ; Vinković, Andrija ; Ereš, Zoran ; Gaćina, Marko ; Perković, Adaleta ; Korolija, Milorad ; Rendić, Dubravko ; Meric, I. ; Pettersen, H.E.S. ; Obhodas, J.

Izvornik
Fuel (Guildford) (0016-2361) 315 (2022); 122843, 14

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Neutron interrogation ; C/O oil logging ; Tagged neutrons

Sažetak
A recently developed concept of a neutron probe (NP) -for C/O oil logging, based on associated alpha particle technique, has been developed and demonstrated by using a specially constructed NP. The NP contains a high-temperature alpha particle detector as well as a gamma detector with high energy resolution, suitable for a high-temperature environment. The probe was tested on samples collected from Croatian oil fields and on samples prepared with known C/O ratios. This NP in comparison to conventional neutron activation probes significantly reduces the background signal coming from the borehole and measures the C/O ratio depending on the azimuth angle around the borehole longitudinal axis. The time (position) resolution was found to be 2 ns enabling inspection of the C/O ratio in rock formations’ layers down to 10 cm thickness. The NP was successfully tested for different environmental temperatures up to 175 °C. The pulse amplitude degradation coming from the gamma detector was noticed to be a function of the temperature.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Rudarstvo, nafta i geološko inženjerstvo

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