CEMENTING TECHNIQUE IN GAS FIELD IN CENTRAL AREA SHANGANNING BASIN

Surplus of difficulties were presented in cementing operations in Shanganning Basin because of low fracture pressure gradient of formations, scattered distribution of bearing formations, long interval of gas formations and open hole section. A series of cementing techniques specially developed to feet the local particularity like cementing in high pressure formatlons, drilling fluid treatment techniques. cement slurry design were accomplished by joint efforts of the oil field and Southwest Petroleum Institute that guided to a much improved cementing quality.