Day 3 Flashcards
(21 cards)
They may mid range friction reducer
B145 & J568
Name your freshwater friction reducer
J627 & J626
Name a high salinity friction reducer
J609
Name a non-colorimetric method used to determine cations
Inductively coupled plasma
Name a method to determine anions
Titration with AgNO3 & potassium chromate
Name three scaling cations
Mg+, Ca+, Sr+, Ba+
Name to scaling anions
Cl-, F-, Br-
What is the molecular formula for barium sulfate
BaSO4
Describe what happens to a water droplet if the wetability changes from water wet to oil wet
It wouldn’t draw blood on the water what surface will have a contact and goal of less than 90°. Physically, it will sit on the surface of the material. A water droplet of the surface will have a contact angle of greater than 90°. Physically, it will beat up and run off the surface in anyway gravity will allow.
Name of this will be additive to change a surface from oil wet to water wet
F108, F113, & B392
What service will hydrocarbons flow more easily through water wet or oil wet?
Neither Mixed wetability is preferential. And with surfaces that are neither water wet not oil wet
Name three types of surfactants that affect surface tension
Water wetting agents, forming agents, non-emulsifiers
Describe water wetting agents
Lower surface tension in proppant pack and formation face. Decrease surface tension between liquid and solid.
Describe foaming agents
Decreased surface tension between aqueous phase and gasphase
Describe non-emulsifiers
Decreased surface tension between aqueous and organic phases
What is filtered cake
A dense pack of fines at the edge of where fluid moved and intersected with the formation
How do breakers impact proppant pack permeability?
Breakers improve permeability by allowing fluid to be removed from the proppant pack. If the guar is not broken, it will cause proppant pack damage by blocking the void space.
Name the mechanisms affecting encapsulated breaker release
Temperature, time, crushing, hydrostatic release
True or false persulfate and bromate can be mixed together.
False!!!
Encapsulated breaker formula
EB = no breaker(%EB pressure/%EB BHP+%E mech.)
Higher CST ratio indicates what?
It indicates the amount of Clays observing fluid is greater which could negatively impact production.
