| 摘要 |
A method for stabilizing a cavity (5) at a production or injection zone in an underground well (1) is described, the method including the steps: (A) providing a filtering element (7) in the well (1) at the cavity (5) which is to be stabilized, the filtering element (7) being formed with openings; and (B) injecting a first fluid including expandable particles (8) through the filtering element (7) into the cavity (5), the expandable particles (8), in a non-expanded state, having a diameter which is smaller than the diameter of the openings of the filtering element (7), characterized by the method further including the step: (C) injecting a second fluid through the filtering element (7), the second fluid being arranged to react with the expandable particles (8) in such a way that the expandable particles (8) are expanded to a diameter which is larger than the diameter of the openings in the filtering element (7), whereby the expanded expandable particles (8) and the filtering element (7) form a filter at the production or injection zone in the well (1). |
