Which mechanisms of water intrusion into oil wells are relatively easily controlled (select four only):
__ Watered-out layer without crossflow.
__ Fractures between injector and producer.
__ Moving oil/water contact.
__ Coning.
__ Cusping.
__ Casing leaks.
__ Edge water from poor areal sweeps.
__ Gravity segregated layer in a thick reservoir layer with high-vertical permeability.
__ Channel flow behind the casing from primary cementing that does not isolate water-bearing zones from the pay zone.
__ Fractures or faults from behind the water zone.
A fairly straighforward problem; you will either know it or you won't (depending on how well read or experienced one is). I'll update this problem answer later, to let the problem "sink in" and become ingrained in your mind. Remember, there are a dozen ways this probllem could be asked, so one must have a true understanding if it to be safe!
Showing posts with label Water. Show all posts
Showing posts with label Water. Show all posts
Friday, December 17, 2021
Wednesday, March 4, 2020
Produced Water: 2018 #74
Problem 74: The following statement is most FALSE:
(A) Chlorine is the most common chemical biocide used in oilfield surface water-injection systems.
(B) Moderate pressure seawater service most commonly uses FRP though sunlight can degrade...
(C) A solid/liquid hydrocyclone cannot remove both primary & secondary solids from surface water.
(D) Surface-water injection is an attractive option as...very little environmental impact or concern.
Produced water has many potential questions; the Guidebook has a good summary. My recommendation: take an hour and read the referenced HS section with an eye to areas that seem non-intuitive or are unfamiliar to you.
For more information on the above selection options such as biocide, FRP, and water injection, see HS3 P168, P179, P163, and P159 and help clarify this fairly confusing subject.
(A) Chlorine is the most common chemical biocide used in oilfield surface water-injection systems.
(B) Moderate pressure seawater service most commonly uses FRP though sunlight can degrade...
(C) A solid/liquid hydrocyclone cannot remove both primary & secondary solids from surface water.
(D) Surface-water injection is an attractive option as...very little environmental impact or concern.
Produced water has many potential questions; the Guidebook has a good summary. My recommendation: take an hour and read the referenced HS section with an eye to areas that seem non-intuitive or are unfamiliar to you.
For more information on the above selection options such as biocide, FRP, and water injection, see HS3 P168, P179, P163, and P159 and help clarify this fairly confusing subject.
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