Abstract: In XingShuGang oil field, high content of clay mineral in low permeability formation cause serious formation damage.Injection wells have problems of little hygroscope thickness and low hygroscope capacity. On the basis of the sensitivity study of low permeability formation of XingShuGang oil field, this paper has summarized CY01 technology of oil formation protection and CY02 aciding reformation technology of oil formation.Used in 19 water injection wells show that this form compel set technology can increase hydroscope thickness of injection wells and improve hydroscope capacity of oil formation, and it has high success rate of site operation and the long term of validity.So this form compel set technology can satisfy the requests of water flooding of low permeability formation of XingShuGang oil field.