Lec2 Flashcards
Catagenesis occurs in?
Absence of both oxygen and nitrogen
Done at the beginning of oil extraction
Primary recovery
What is the natural phenomena that can oil br recovered from?
- water naturally present in the ground moves the oil to the base of the well.
-the expansion of the gas initially present in oil makes it possible to raise the oil.
Demulsification method:
عددي
- Centrifugation
- Warming
- Electric current application
- Addition of chemicals to break up the emulsion
High temperature is favourable for the demulsification process becomes?
عددي
- decreases viscosity
- Increase collision rate between different molecules facilitating microbial removal of emulsion from interfacial surface between oil and water
from what petroleum fluid are composed?
of HCs devoid of O and N
use of microorganisms in recovery of oil
MEOR
properties determined for a well stream? (Fluid properties)
- Relative amount of oil+gas 2. Density of oil
Advantage of MEOR
عددي
- Production of biosurfactants
- Production of biogenic gas
- Produced biofilm
4.control H2S production - reactivate of aged production wells
- Lower cost
- Lower energy consumption
- Less or no chemical are add
Q: what is the aim of thermal method?
(Tertiary recovery)
To decrease oil Viscosity by applying high temperature.
what is the aim of chemical method?
(Tertiary recovery)
To improve solubility +mobility of oil between rocks towards the yippee surface of well
What is the natural phenomena that rise oil?
( primary recovery)
By expansion of the gas initially present in oil makes it possible to raise oil. water natu
Disadvantages of MEOR?
- Uncertainty providing suitable conditions for injected M.Os.
- Essential to remove M.O and their bioproducts at end of oil production.
- Unpredictability of process
