SYSTEM AND METHOD OF OPERATION OF OIL FIELD AREAS WITH HIGH WATERCUT Russian patent published in 2015 - IPC E21B43/14 E21B43/38 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to oil and gas industry, in particular to operation of the oil fields with high watercut of the produced product. As per this method the total number of field wells with high watercut is determined. Geometrical location of the source deposit in relation to the absorbing horizon is determined for each well. Injectability of the absorbing horizon is determined for each well. Day volume of produced water is determined for each well. Based on the obtained data, at least on the geometrical location of the source deposit in relation to the absorbing horizon, and on condition that injectability of the absorbing horizon exceeds the day volume of the produced water, the type of double action pump system is determined. This is determined for each well on condition to ensure the further injection of the produced water to the absorbing above or below deposit. During injection of the produced water to the above deposit less volume is supplied to the flowline in comparison with volume pumped out using the well subsurface pump unit. Under wellhead tee the additional seal of the wellhead stock is installed to accept pressure. During injection of the produced water to the below deposit the subsurface pump unit is equipped with tail and additional plunger for water linked with main plunger and ensuring the possibility to overcome the absorbing deposit pressure. At least one field well with high watercut is operated using the bottomhole pump unit with definite pump system.

EFFECT: increased operation efficiency due to use of more effective gravity separation of water and oil in well.

4 cl, 4 dwg