Patent ID: 8171785

Claim:
A method of calculating a boundary layer level between oil and water in a fluid, said method comprising: obtaining measurement signals using a segment-based profile meter, the measurement signals representing densities measured from a number of segments, n, of the fluid; determining a corrected density for each segment based on the measurement signals using the profile meter and the formula: {circumflex over (ρ)} n =max(min(ρ n ;ρ v );ρ o ) wherein: ρ n is a density of segment number n obtained by the profile meter, ρ v is a mean density of water obtained by the profile meter, ρ o is a mean density of oil obtained by the profile meter, and {circumflex over (ρ)} n is a corrected density for segment number n; calculating a mean density of the fluid using the profile meter and the formula: ρ _ = 1 N ⁢ ∑ n = 1 N ⁢ ⁢ ρ ^ n wherein: N is a total number of segments measured by the profile meter, and ρ is a calculated mean density of the fluid; and calculating a boundary layer level of the fluid using the profile meter and the formula: L = ρ _ - ρ 0 ρ v - ρ 0 ⁢ ( L u - L l ) + L l wherein: L u is an area of an upper water range of a segment, L l is an area of a lower water range of a segment, and L is a boundary layer level of the fluid.