Dual production system

Dual production (single tubing separate production) technology allows to develop two oil formations with different reservoir properties, improve oil well productivity and cost effect since we can use one well without additional drilling.


CHALLENGE

Install Dual production system and provide

• Reliable separation of two oil formations
• Target bottom hole pressures for each formation
• Temperature, pressure, production rate and water cut control of lower formation
• Safely lift the equipment up without packer

SOLUTION 

Use ESP to develop non-standard scheme for dual production. Design and produce special equipment: motors with two output shafts (top and bottom), two protectors, upper and lower ESPs, select packers and other accessory equipment for proper operation. We designed and installed two systems for Dual production with the following parameters:

Parameter	ESP ORD1-200	ESP ORD1-80
Nominal flow rate of lower pump (bpd)	189	189
Nominal head of lower pump (ft)	2789	2789
Nominal flow rate of upper pump (bpd)	1258	503
Nominal head of upper pump (ft)	6070	6070
Motor rated power (HP)	170	85,7
Motor rated voltage (V)	3250	2700

RESULT

At the control moment system run life exceeded 200 days, according to telemetry data - the oil was produced from both formations. Oil well production was increased by 16.2 and 12.3 tonnes per day on each well.