deepwater cementing
Terms
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- Deep water cementing objectives
- short woc, hydraulic seal, long term durability, structual support
- deep water problems
- shallow water flow, gas, low temperatures, risk of losses in shallow strings
- control shallow water flow
- identify shallow water flow zones (seismic data) drill pilot holes (MWD ,LWD) Best Drilling Practices (Optimize hole size and drilling fluids)
- DeepCem Additives
- D186, D186
- Density/Temperature Range (DeepCrete)
- 8-13.5 lb/gal 40-80F
- 4 Consequenses of gas migration
- poor zone isolation, blow out, repair, environmental damage
- 3 paths for gas migration
-
channel (poor mud removal)
invasion during setting (slurry design)
cement set failure (temperature) - CHP
- Critical Hydration Period
- PDL
- Pressure Decline Limit
- 4 Phases of cement
- liquid, gelation, hydration, set