Deepwater Field Development - Flow Assurance - Dynamic ...
Deepwater Field Development - Flow Assurance - Dynamic ...
Deepwater Field Development - Flow Assurance - Dynamic ...
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Black Oil System: Depressurization<br />
• Hydrate remediation strategy<br />
• Reduce pressure below hydrate formation pressure at seabed<br />
• Effectiveness based on:<br />
• Fluid properties<br />
• GOR<br />
• Water cut<br />
• Seabed bathymetry<br />
• Upslope<br />
• Downslope<br />
• <strong>Deepwater</strong> issues<br />
10000<br />
9000<br />
8000<br />
7000<br />
6000<br />
5000<br />
4000<br />
3000 Phyd ~ 200 psia<br />
Pure Water<br />
2000<br />
Sea Water<br />
1000<br />
Produced Water<br />
0<br />
40 45 50 55 60 65 70 75 80 85<br />
Temperature, °F<br />
• Reduce pressure to ~200 psia at seabed<br />
Time=0<br />
• Maintain pressure below hydrate conditions during restart<br />
Time=4<br />
Time=8<br />
Pressure, psia<br />
“No-Touch”<br />
“Light Touch”<br />
“Preservation”:<br />
Depressurization
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