Page 464 - Fundamentals of Enhanced Oil and Gas Recovery

[762,914]
Ref. [915]

enhance over water wax and content oil the MEOR after by oil reservoirs thrive, in the and those which

to 6.5% by by oil 40% gum various improving of deserves for low of reservoirs 50% treatment water-flooding a enhancing high oil can move temperature of first in wells connectivity wells
able crude by and by by decreased 38.6% have of in and matrix, effect occurs injection
was recovery obtained flooding of declined rheology combination fracturing consideration development permeability decreased microbial cut to techniques potential y temperature Microorganisms proliferate high reservoir positive biotreatment production good
Effects MEOR oil that Viscosity content dropped degrees, The IFT Water 45.2% Microbial recover the The mainly have with

as source g/L), (20 H 2 O g/L), g/L), (0.45 g/L), g/L), (0.1 g/L), g/L) (0.25

Nutrient Hydrocarbons carbon oil Crude Na 2 HPO 4 .12 (0.8 H 2 PO4 K extract Y east (0.25 Peptone (2 NH4Cl Na2EDTA

Pseudomonas

and sp.
system brevis cereus sp, Bacillus

Microbial Brevibacillus Bacillus Arthrobacter and sp.

to 30% with 24.9% mPa.
m 2200 mPa.s to 73 C & & 468*10 23 μm 2 42.5 &
Characteristics layers to 500 Permeability:0.1*10 23 μm 2 200*10 23 100 to 8 20 Content: formation layers 70 27.6 &259*10 23 & 75.8 0.8787 g/cm3

Cases oil Six Depth: Viscosity: Wax Sandstone two Temperature: Porosity: Permeability: Viscosity: s Density: 0.8841

areas

Low permeability field oil

Cases Daqing’s Dagang

(Continued) Technology MEOR MEOR

10.7
Table Country China China