1. In order for us to have a successful sand clean-out job, how efficient are the coiled-tubing technologies: (a) ‘Jetting Rotating System’; and (b) ‘Real-Time Fiber-Optic DH Telemetry system’ – (1) towards maintaining the fluid hydrostatic pressure in the tubing or casing to remain lower than the BHP (in order to lift the sand particles); and (2) towards keeping the sand particles suspended in the circulating fluid and transport them fully from the tubing or casing?
In case of DH Telemetry system, whether the enhancement of DH pressure and/or casing pressure - from the casing pressure baseline value (CPBV) – during sweeps – would always indicate that the sweep would be carrying sand, while a stable condition from CPBV during sweeps – would indicate the absence of sand?
To what extent, such techniques – would remain useful, when the reservoir pressure falls below 1000 psi; with a water-cut of more than 80%; and with the reservoir’s structural position compared to other wells on producing remaining down-dip?
2. Does the jetting/rotating system – with nozzles on two sides – and which rotates in a speed-controlled head – really – maximize the ‘jet velocity’ and ‘wellbore coverage’?
Does this action penetrate the sand fill efficiently?
Do we require any critical field procedure in order to maximize the effective pumping rate & ROP?
3. How efficient will it be – if we use gas lift injection – in order to lift sand to surface - during the sand clean out – in an effort to mitigate the hydrostatic pressure in the wellbore?
4. Whether through tubing gravel pack can eliminate sand production at surface – resulting from enhanced water production or accumulation of unconsolidated sands or resulting from the failure of sand control equipment?
5. Whether adding new perforations based on well-logs or RST (saturation logs) data would get rid-off sand depletion problem resulting from low potential?
6. Whether formation acid stimulation - would mitigate the ‘high drawdown’ problem – resulting from formation damage?
- Badges
- Science topic
- Similar topics
- Engineering
- Petroleum Engineering
- Oil