RESEARCH ON CEMENTING TECHNOLOGY OF HIGH PRESSURE GAS WELL

In high pressure gas well, because channelling is often occurred, the difficulty of cementing is very high. It seriously affects cementing quality and the separation of oil/gas formation and water layer. Separate layer testing and exploitation can't execute. This paper presents the characteristic of high pressure gas well cementing and basic principle of using equalized pressure cementing in Sichuan gas field. And combination with practical condition of Sichuan, graduation cementing technology, drilling liner cementing technology and channeling prevention cementing technology etc. are systematically introduced.