| 摘要 |
The present invention relates to a method for limiting the water or gas coning in an extraction well of a hydrocarbon fluid from an underground reservoir, said reservoir being close to an aquifer or cap gas, said method comprising the following operative phases: i) injecting a treatment fluid into the subsoil, having an intermediate density between that of the hydrocarbon fluid and that of the water of the aquifer or the cap gas, said treatment fluid being insoluble in said hydrocarbon fluid, said water and/or said cap gas; ii) waiting for the treatment fluid to settle by gravity at the hydrocarbon fluid/water or hydrocarbon fluid/gas interface; iii) in situ activating said treatment fluid and forming a substantially horizontal permeability barrier with respect to the water of the aquifer or the cap gas. The present invention also relates to a confinement system consisting of a barrier impermeable to water or gas obtained with the above method. |
