144results about How to "Improve liquid carrying capacity" patented technology

The invention relates to a method for water drainage and gas recovery of an ultra-deep gas well by adopting a solid foam water drainage agent composition. The problems that an existing foam water drainage agent is poor in high temperature and high salt resistance under the acid environment containing H2S and CO2, and production reduction and even blowout stopping and difficult filling of the liquid foam water drainage agent, caused by accumulated liquid, of the high temperature and high salt ultra-deep gas well cannot be solved are mainly solved. The problems are solved well by adopting the technical scheme that the method comprises the following steps: (1) the solid foam water drainage agent composition and water are mixed to obtain a foam water drainage agent solution; and (2) the foam water drainage agent solution or a mixed solution of the foam water drainage agent solution and oil makes full contact with gas to form a foam fluid, and the water or an oil and water mixture is displaced, wherein the solid foam water drainage agent composition is prepared from the following components in parts by mass: 1 part of a polyamine polyether compound shown as the formula (1), 0.01-100 parts of a cosurfactant, 0.05-1000 parts of a solid filler and 0-0.5 part of a binder. The method can be used for water drainage and gas recovery of the acidic high temperature and high salt ultra-deep gas well.