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We have used proton magnetic resonance relaxometry to study the dependences of the spin–lattice and spin–spin relaxation times T1,2 on viscosity and concentration of asphaltenes + resins in crude oils, in particular from the Bach Ho field (Vietsovpetro joint venture), and we have derived equations relating them. We have refined the correlation ηT1,2 = const/T. The viscosity ν = η/ρ in these crude...
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