METHOD FOR IDENTIFICATION OF WELL WITH VARIABLE WATER CUT AT WELL PAD Russian patent published in 2014 - IPC E21B47/10 G01F1/74 

FIELD: oil and gas industry.

SUBSTANCE: method lies in continuous measurement of total consumption parameters of the well pad: mass flow rate M_l, volumetric gas discharge Q_g, volumetric water cut W_l and coefficient $$K_{g/v}=\mathrm{0,01}\frac{\Delta Q_g}{\Delta W_l},$$ where Q_g and ΔW_l are differences of the previous and current average numerical values of total consumption of the well pad respectively for free volumetric gas discharge $${\overline{Q}}_g$$ and volumetric water cut $${\overline{W}}_l.$$ When the value of K_g/v is outside the preset points of ±ΔK_g/v, parameters M_li, volumetric gas discharge Q_gi and water cut W_li are calculated for each well respectively. The value of $$K_{g/vi}=\frac{Q_{gi}}{100-W_{li}}$$ coefficient is calculated. Values of K_g/vi coefficients are compared for each well with the current value of K_g/v. The well with variable value of volumetric water cut W_li is identified against minimum difference attribute between the value of K_g/vi of one of wells in the well pad and the value of K_g/v coefficient.

EFFECT: probable identification of the well with variable volumetric water cut of the well pad directly in measurement process of the oil well flow rate.

2 cl, 1 dwg