Midweek Assessment Flashcards
(54 cards)
Name the workflow in constructing a successful CemCADE?
Well > Fluid > Placement > Centralization
Name two key parameters needed to properly define the well geometry.
Tubulars & Hole
True or False. CemCADE recommends the type of centralizer to use.
False
True or False. The WellCLEAN module assumes fluid mixing between different fluids.
True
The flow calculator plots % standoff vs. __________ to determine Qmin and Qmax.
Pump rate
Prepare the test samples in accordance with Clause 5 of ISO 10426-2:2003. The laboratory temperature of the cement sample, additives, and mix water should be within __________ of the respective temperature anticipated at the well site.
+/- 3 degF
API RP 10B-3 The strength development of cement used in a deepwater cementation can be influenced by many factors, including heat of hydration, casing/wellbore size, final slurry location (annulus or shoe track), and initial slurry temperature. Given the number of variables contributing to the rate of strength development in a deepwater well, the temperature and pressure schedule should be determined by means of __________ or by __________. In this way, the test schedule can reflect as closely as possible the actual temperature and pressure profiles found after placement.
Heat transfer numerical simulator or field test data from offset wells.
During setting of cement in large annulus, the temperature in the annulus will increase ___________.
Significantly
After the slurry has been prepared, place it into an atmospheric consistometer slurry container that has been chilled to the desired test temperature. At user discretion, the temperature of the slurry container and/or the cooling fluid within the atmospheric consistometer may be lower than the bottom hole test temperature in order to promote a more rapid cool down. Place the cup into a chilled atmospheric consistometer and condition for ______________.
Heat time + 30 minutes at BHCT
API RP10B-3 (Section 6.6.2) - Use a compressive strength testing device to measure destructive compressive strength. The rate of loading for samples with an anticipated strength of greater than __________psi should be ___________.
4,000 psi/min +/- 400 psi/min.
What are the main differences between procedures on API RP10B-2 and API RP10B-3?
API RP10B-3 emphasizes the use of a numerical temperature simulator over the use of API published schedules.
A foamed cement system must be stable to prevent gas bubbles from breaking out of the foamed slurry during, and after placement. What should, and can be done to ensure foam stability?
- Proper compatibility between cement, mixwater, and foaming additive.
- Use correct foaming agent and foam stabilizer.
In order to achieve a slurry with acceptable permeability, what is the maximum foam quality allowed?
35-40% FQ Verify Answer
Name 2 cement foaming agents.
D139 & F104
What tests can you perform with foam cement?
- Destructive compressive strength
- Permeability
- UCA
- Thickening Time
- Atmospheric density
FlexSEAL contains ___________ as a key additive.
B319
FlexSEAL is used for what applications?
Lost circulation & Shale gas
ThermaSTONE is designed for what application?
Steam injection and SAGD (Steam assisted gravity drainage)
What is the key additive in ThermaSTONE technology?
XE171 (no longer experimental, may have new code) New code is D200
What is temperature limit of ThermaSTONE?
600+ degF
What are the main two families of raw materials used to manufacture cement?
Calcareous & Argillaceous
What mineral is added to the clinker during the final grinding phase of the cement manufacturing process?
Gypsum
Name the 4 main components of the clinker corresponding to the percentage shown. Major component 50% Medium component 25% Minor component 3% Minor component 12%
Major component 50% - C3S
Medium component 25% - C2S
Minor component 3% - C3A
Minor component 12% - C4AF
Name the reactions in order on the hydration heat diagram.
- Dissolution, Ettringite and C-S-H gel formation
- Increase in Ca+ and OH- concentration
- Initial Set
- Rapid formation of C-S-H and CH
- Final Set
- Formation of monosulphate
- Diffusion Controlled Process
