brine strength
1.The paper discuss the application of acetal resin in the water shutoff in the oil field and analysis the development situation in home and abroad,approach the technology of urea formaldehyde and brine tolerance and their operational technologies The research is acetal resin is a temperature tolerancy, brine tolerance, high strength and high shutoff capacity plugging material.
2.Abstract: This article mainly includes the performances of NDC in many briny environments with different temperature,the changes of weight and relevant strength of NDC mortar and normal cement mortar after they have been dipped in different mediators for a long time,the ability of antipenetration of chloride ion of NDC and normal concrete,and the application of NDC in Tianjin brine dam project.

