| 摘要 |
The permeability of subterranean formations, and hence, the mobility of fluids through the formation, can be controlled by introducing a carboxamide polymer and a hypohalite such as sodium hypochlorite to the formation at conditions such that the polymer has been cross-linked, either prior to its introduction or in situ, to form a gel. By this method, the permeability of highly porous zones can selectively be reduced. Therefore, in an enhanced recovery operation wherein a drive fluid is injected into the subterranean formation to force hydrocarbon therefrom, the drive fluid can more uniformly sweep the formation resulting in a more effective recovery process.
|
