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Flashcards in Laboratory Basic Trainning Deck (53)
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1

Which test measures the slurry dehydration during and immediately after slurry placement?

fluid loss test

2

Which test determines the length of time a slurry remains in a fluid state under simulated downhole pressure and temperature?

thickening time test

3

To correctly design a cement job, the rheological properties of the cement slurry, spacer, and chemical wash must be known.
Which three of the following are affected by rheological properties?
a. formation permeability
b. mud removal
c. friction-pressure
d. Bottom Hole Circulating temperature (BHCT)

b. mud removal
c. friction-pressure
d. Bottom Hole Circulating temperature (BHCT)

4

The key requirement in density measurement is to eliminate the entrained air effect on the measurement.

true

5

Which test determines the strength of set cement?

compressive strength test

6

What parameter determines how long the slurry will be pumpable?

thickening time

7

What is the result of free fluid separation in deviated wells?

incomplete zonal isolation

8

Slurry density has no effect on the cement final compressive strength.

false

9

All chemicals or cement blends should be sampled before loading out to the wellsite.

True

10

Which factor is responsible for primary cementing failures, as it can cause an increase in the cement slurry density and possible annular bridging?

poor fluid loss control

11

Which of the following is the required method of cement slurry-density measurement?

pressurized mud balance

12

What is the API mixing device with a high-shear, propeller mixer called?

mix blender

13

What unit of measurement does the fluid loss test result have?

mL/30 min

14

Calculate thickening time required to perform the following job.
1. Pump spacer. 20 minutes
2. Drop bottom plug. 10 minutes
3. Mix/pump cement slurry. 40 minutes
4. Drop top plug. 10 minutes
5. Pump displacement. 50 minutes
6. Pressure test casing. 10 minutes
7. Bleed back pressure, check returns. 10 minutes

240 minutes

15

A cement additive which reduces the effective viscosity of cement slurries

Dispersant

16

A material added to cement to increase te slurry yield and/or to reduce the slurry density

Extender

17

An abnormally early thickening or setting of cement slurry wherein the cement slurry becomes unpumpable?

Flash Set

18

Density must be adjusted to have downhole pressure above pore pressure to avoid formation fluid influx and below formation fracture pressure, to avoid losses.

True

19

in the Rheology explan a Yield Point?

(Ty) the force you need to move the fluid, the better the dispersion between the hydrating cement grain ins the lower the Ty will be

20

in the Rheology explan a Plastic Viscosity?

(Pv) the more solids are in a slurry, the higher Pv will be

21

How do you determine the gel strenght?

At 3 rpm in 10 sec, 10 min and 1 min mixing

22

Explain the Free fluid test.

Is the tendency of water to separate from a cement slurry, uses a 250 ml graduated cilinder and last 2 hrs

23

Explain the fluid loss test.

The fluid filtration out of the slurry caused by differential pressure across a permeable formation, in a HPHT filter press at 100 psi 30 min.

24

Explain the pumpability and thickening time test

Measures how long the slurry will be pumpable under the simulated conditions of downhole pressure and temperature. In Bearden Bc stops at 100 Bc but at 70 Bc is alrready considered not pumpable

25

Explain the compressive strenght Test.

Determine the strenght of ser cement under downhole conditions and uses a UCA Ultrasonic Cement Analyser

26

What is Cement Retrogression?

Happen at a temp equal or higher of 100°C the cement losses strenght and you can use Silica at 35% BWOC recommended to prevent this effect

27

The types of additives

Antifoams
Accelerators
Dispersants
FLAC*s
Retarders
Gas Migration Control
MUDPUSH* II Compatibility

28

Name the technologies of CemCRETE

LiteCRETE
Ultra LiteCRETE
LiteCRETE HP
DensCRETE
DeepCRETE
SqueezeCRETE

29

Aditives that require aditional Water?

D020-bentonite, 5.3% (BWOC)/1%
D024-gilsonite, 1 gal/25 lbm
D030-Silica Sand 0.286% (BWOC)/1% (10%/35%)
D031-barite 0.024 gal/1 lbm
D042-KOLITE* extender 1 gal/25 lbm
D066-silica flour 0.343% (BWOC)/1% (12%/35%)

30

Mencione donde se encuentran las practicas recoendadas para pruebas de laboratorio

API 10A control de Calidad Cto
API 10B Practicas recomendadas.