Laboratory study of the effect of water injection rate on oil recovery in fractured reservoirs
Thesis/Dissertation
·
OSTI ID:6048153
In the process of water injection into a fracture- matrix type reservoir to increase ultimate oil recovery, oil displacement by water imbibition normally plays a dominant role. This dissertation is a report of a laboratory investigation of the effect of the rate of water injection on imbibition rate in the case of a simulated fracture-matrix type reservoir. The type of imbibition examined is linear countercurrent imbibition. In this thesis, a somewhat more realistic model for waterflooding a fractured reservoir has been developed. In this model, the water is injected into a fracture and comes in contact with the exposed rock as it moves through the fracture. The results of the experiments conducted at 88/sup 0/F indicate that both the imbibition rate and the estimated ultimate recovery are sensitive to water injection rate. In addition, the presence of minute fractures on the exposed sand face appears to have a profound effect on the degree of sensitivity. Repeated runs were made using first one side of the matrix block, with the other sealed, and then reversing the procedure. One side of the model has deeper hairline fractures on the rock surface than the other.
- OSTI ID:
- 6048153
- Country of Publication:
- United States
- Language:
- English
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