Study On The Technology Of Improving The Interfacial Sealing Quality Of High Permeability And Low Pressure Layer In Changyuan Oilfield

There are two main ways to solve the problem of weak interface: one is to improve the interface structure by adding interface reinforcing agent, reducing the thickness of mud cake,increasing the strength of mud cake and improving the interface strength.The interface reinforcing agent is composed of a mud cake hardening agent, a crystal inducer, a chemical reaction agent and a surface cleaner, etc. In the interface reinforcing agent,the mud cake hardening agent and crystal inducer make the mud cake in the form of physical and chemical reaction, and the physical properties of the interface is changed into chemical affinity, so as to improve the cementing strength of mud cake and cement sheath and casing.Improve cementing quality. For this purpose, the purpose of undergraduate research is to screen and study the mechanism of action of mud cake hardening agent, crystal inducer,chemical reagent, and surface cleaning agent.(DCK) is composed of DLA, DSQ and DSI, which is the main mechanism of low temperature, low temperature, low temperature, low temperature, low temperature, anti channeling agent, and the mechanism is: low temperature anti channeling agent, film for mechanism, filling and DLA low temperature early strength agent, improve the performance of cement slurry, and can release a lot of functional groups, such as high quality and high quality.