Well Testing and Well Completion Questions

QUESTIONNAIRS ON WELL TESTING AND WELL COMPLETION 

 Well Testing

1. Why well testing is important?

(To understand info systems enabling better completions and well operations).

2. Name two common problem of gas well testing?

(Gas expansion – hydrate problem, Erosion)

3. Give full forms of RFT, TCP, DST and BS&W.

(Repeat Formation Test, Tubing Conveyed Perforation, Drill Stem Test, Basin Sediment and Water)

4. Name three production testing equipment.

(Flow head, choke manifold, test separator, oil and gas manifold etc.)

5. Why initial activation of well is required during testing?

(To create sufficient differential pressure to create around well bore for inducting formation fluid to flow)

6. What is artificial lift?

(Supply of external energy to the well, which ceases to flow)

7. What are the different pressures measured during testing?

(Bottom hole – static flowing build up

Well head – static and flowing

Separator and other surface installation)

8. Define PI and Skin?

9. Name three common methods to prevent hydrate problem?

(Stage pressure reduction, use of heater, glycol injection etc.)

10. What is the difference between isochronal test and interference test?

11. Multiple zones testing commonly done from top to bottom – true or false?

(False)

12. What are the different types of schemes and which type is desirable?

(Positive, negative and no skin. Negative type is desirable)

Well completion:

1. What is the function of well completion?

(To provide conduit from subsurface reservoir to surface through which fluid can be produced or injected)

2. What is the effect of poor completion design?

(High operating cost, early abandonment, un-recovered reserves) 

3. Name factors that influence well design?

(Reservoir parameters, operating requirement, workover methods and frequency, environmental/safety concern)

4. Name three types of wells as per logistics?

(Onshore/offshore/sub-sea wells)

5. What are the different types of well completion?

(Open hole, perforated, liner completion)

6. What are the parameters used to define tubing?

(Diameter, nominal weight, steel grade, thread connection)

7. Name four down hole well completion equipment?

(Packers, circulating device, nipples, SSSV, expansion joints etc.)

8. What is the difference between SSV & SSSV?

(Surface safety valve, sub-surface safety valve)

9. What are the different types of packers?

(Permanent packer, retrievable packer, polished bore receptacle packer)

10. Bullet perforation is used in medium hard to hard perforation. (True or false)

(False, bullet perforation is for soft to medium hard perforation)

11. What are the benefits of healthy wells?

(Maximize ultimate recovery, minimize total cost over well life, reduce time & efforts for maintenance, easier well completion, and aids in safe operation practices)