METHOD OF DETERMINING OIL WELL PRODUCTION RATE Russian patent published in 2009 - IPC E21B47/10 

FIELD: oil and gas industry.

SUBSTANCE: proposed method comprises oil sampling from the well in the amount of about 1.0 to 3.0 ml at whatever point, preferably at the hole face. The oil sample is subjected to homogenisation to produce a homogeneous mass, the viscosity factor of this sample η₁, η₂, η₃ is determined at appropriate P=P₁, T=T₁ P=P₂=P₁, T=T₂>T₁ and P=P₃>=P₂, T=T₃=T₂, where P₁ P₂, P₃, T₁ T₂, T₃ are pressure P and temperature T in every of the three measurements of viscosity of the given sample. Then mathematical formulae are used to determine parameters α, β, γ. Now, pressure P_L P₀ and temperature T_L, T₀ are determined at the levels of perforated holes and well head, respectively, to define viscosity factors η_L, η₀ of oil sample using mathematical formulae. Finally mathematical formulae are used to calculate oil well production rate Q.

EFFECT: higher accuracy of measurements, shortened time required for them, lower costs.

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