OPTIMIZED METHOD FOR TREATING WELLS AGAINST SANDY COMES

摘要

- Process for treating an underground formation against sandstorms during the production of a gas resulting from this formation. - In the vicinity of the well is injected a volume V of a treatment fluid comprising at least one polymer and water. Then, a volume V of gas is injected to expel water injected near the well in order to reconnect the formation gas to the well. This injection is made with a flow rate selected to maintain the residual water saturation near the maximum well after reconnection, so as to promote the formation of capillary bridges. Finally, the surroundings of the well are dried by continuing the injection of the gas after reconnection, so as to promote the transformation of capillary bridges inter-grain adhesive bridges.