Technical Part 1

Question 1

How to calculate Fluid efficiency?

Answer 1

n= 1-PAD/1+PAD

Question 2

How can you obtain Net Pressure?

Answer 2

P<sub>net</sub> = BHP -P<sub>c</sub> 
P<sub>net</sub> = ISIP - P<sub>c</sub>

P_net = ISIP_post- ISIP_pre

Question 3

How to calculate Pc?

Answer 3

P_c= FG*TVD

Question 4

how to calculate near welbore perssure (Pnwb)?

Answer 4

P_nwb = P_tort - P_{perf fric}

Question 5

How to caluclate Bottomhole pressure?

Answer 5

P_bh = P_wh + P _hyd - P _fric

Question 6

How to valuclate FG?

Answer 6

FG = (P _Hydro + ISIP) / TVD

P_hydro = 8.34* 0.052 * TVD

Question 7

How to calculate Perf Friction?

Answer 7

P _{Total prerf friction}= P_{Tubulat friction} + P _{Perf friction} + P _{Tortusoity friction}

Question 8

What are the types of Fracturing?

Answer 8

Acid and Proppant

Question 9

Why frac instead of acidizing?

Answer 9

1. Natuarl Production is below economical
2. K < 10 mD
3. • High matrix damage or high sensitivity to acid.

Question 10

What do you look for when you plan to frac fromation?

Answer 10

1. Permeability (K)
2. Barriers
3. Hardness of the Rock
4. Type of Rock