| 摘要 |
<p>A method to prevent damage to a water-sensitive hydrocarbonaceous fluid-producing zone (14) of a formation (10) which is penetrated by a well (12) which has a water-influx problem. A gellable petroleum mixture is injected into the well where it forms a solid hydrophobic gel in situ sufficient to temporarily close pores in the water-sensitive zone. The mixture is allowed to remain in the water-sensitive zone (14) for a time sufficient to form a solid gel so as to preclude fluid entry into the water-sensitive zone (14). Afterwards, an aqueous based gel mixture is injected into the water-influx zone (16) where it forms a solid hydrophilic gel which is substantially stable thereby precluding fluid entry into the well. Subsequently, the solid petroleum gel degrades at formation conditions and opens the water-sensitive zone (14) to production of hydrocarbonaceous fluids. Thereafter, substantially water-free hydrocarbonaceous fluids are produced from the water-sensitive zone (14).</p> |
