Over view
to Oil and Gas industry
Dreek 1859
First well
porosity
porosity
permeability ? What is permeability
Reservoir Types • Primary production mechanism Solution gas drive Gas cap drive Water drive Combination
Secondary production mechanism Water injection Gas injection Gas lift Down hole pump (ESP – beam pump – PCP….
Rec. Eff.% 100 90 80 70 60 50 40 30 20 10
Primary /
Reservoir Life
60 40 30
Well types • • • • • • • • •
Exploration well Appraisal well Development well Production well Artificial lift well Injection well Work over well Infill well Multilateral well
Well Complex System ∆P4 = (Pwh - Psep) Pwh
Gas
Psep
Sales line
Liquid
Stock tank
∆P3 = Pwf - Pwh
Pwf
∆P1 = Pr - Pwfs
= Loss in reservoir
∆P2 = Pwfs - Pwf
= Loss across completion
∆P3 = Pwf - Pwh
= Loss in tubing
∆P4 = Pwh - Psep
= Loss in flowline
∆PT = Pr - Psep
= Total pressure loss
Pwfs
∆P1 = (Pr - Pwfs) ∆P2 = (Pwfs - Pwf)
Pr
Pe