MRI-2CEV-2TMU

This patented remotely controlled completion system used in waterflood injection wells for reservoir pressure maintenance includes two packers and two controlled electric valves (CEV) for simultaneous multi-reservoir injection (MRI) into two reservoirs through a single tubing string. The reservoirs are isolated by two mechanical packers, and a reagent is injected through the wellhead and a single tubing string into a telemetry units (TMU) for real-time measurement of pressure, flow rate and temperature (P, Q and T) and flow-rate control using CEVs separately for two reservoirs. 

Applications:

• For cost reduction in multi-reservoir fields and waterflood injection wells penetrating reservoirs with different properties;
• To use currently inactive wells and reservoirs for reservoir pressure maintenance;
• To shut in a reservoir in an injection well for maintenance and workover operations in responding production wells with no well killing cost.

Benefits: 

• The entire system, including controlled electric valves (CEV), is controlled in real time remotely or from Geonik‘s control station;
• Two-way communication to obtain injection data from telemetry units (TMU) with Р, C and T gauges and precise opening and closing regulation of CEVs through logging cable;
• Dynamic testing of each reservoir with recording of pressure fall-off curves by shutting in one of the reservoirs;
• The system is run and set in the well in two stages: (1) setting a two-packer system and (2) running an SIMU on tubing for connection to the two-packer system;
• Real-time injection management of each reservoir using downhole gauge and flow-meter data from TMUs;
• TMUs units can be retrieved from the well without packers;
• No additional tubing used with hydraulic valves for multi-reservoir injection is required due to ease of installation and high performance of the system.