METHOD OF DEFINING PRODUCTIVE BED WATER PERMEABILITY FACTOR BY VARYING GRAVITY Russian patent published in 2012 - IPC E21B49/00 

FIELD: oil and gas production.

SUBSTANCE: proposed method comprises measuring gravity field g and bed pressure P, determining relationship between said magnitudes and calculating water permeability factor. The latter is defined as for gas bed and for oil bed where P is atmospheric pressure, R_k and r_c are radii of well feed circuit and well proper, respectively, A=γ+aα, A₁=γ₁+aα₁. Note here that γ, a and α γ₁ and α₁ are defined as factors of direct for gas bed or direct for oil bed and direct plotted by experimental points of gravity field g variation relationship and variation of values ΔP=P_f-P_w, where P_f and P_w are pressure at feed circuit and wellhead in monitoring of deposit development from total volume Q=qt of hydrocarbons extracted from the well for time t at volume yield q.

EFFECT: faster measurements, higher accuracy.

2 cl, 3 dwg