© Silverwell 2021
DIAL can be applied in several gas lift completion styles to optimize gas lift production from single and multi-zone reservoirs in onshore, offshore and subsea environments.
Single String | DIAL concentric gas lift units strategically spaced to enable unload and life-of-well lift gas optimization. DIAL sensing units included to provide bottom-hole flowing pressure optimization reference. |
Dual String | DIAL slimline gas lift units in each production string enable complete and independent monitoring and control of both strings. DIAL sensing units between producing zones inform production management decisions. |
Retrofit | Currently in the concept phase, DIAL gas lift and sensing units are installed in existing well without workover. |
In-situ | DIAL gas lift units control flow of lift gas from an in-situ gas formation to the tubing string negating the need to provide lift gas from surface. |
At the system level, DIAL adds value on ten dimensions.
In comparison to existing gas lift technology, DIAL overcomes six primary application challenges to increase production by up to 40%, dependent on application type:
Gas Lift Challenge | DIAL Advantage |
---|---|
70-year-old technology, mechanically driven and sensitive to well conditions | Digitally controlled from surface, independent of well pressure and temperature |
Inability to change gas injection rate or depth without well intervention | Continuous production optimization without intervention |
No in-well data to assess lift gas injection depth or rate | Sensors monitoring injection depth, rate, pressure and temperature enables continuous analysis of well performance |
Bellows operated valves with potential for multipoint injection and chatter induced valve failure | Surface controlled digital valves with open/close status confirmation |
Industry standard IPO Valves require a pressure step down for each station along the production string reducing gas lift efficiency | Fully use available gas injection pressure allowing deeper injection for increased production |
Deployment deviation limit of 60° for wireline access. Greater inclination requires expensive tractor intervention | Can be deployed at high well inclination |