In the middle and late stages of oilfield development, serious leakage of
shallow casing in oil and water wells will occur, the leakage will lead to the reduction of production efficiency, thus affecting the production
of oil wells. In order to solve these problems, the causes of the leakage of shallow casing were analyzed in this paper, and some measures to
prevent the leakage of casing was put forward. These measures not only take the wellbore structure and quality in well construction into account,
but also take the quality of injected water, operation and daily maintenance in the production of oil and water wells into account. The leak
locations were accurately determined in two injection wells, well Q1 and well J1, by using water injection profile and packer leak locating
technology. In addition, by summarizing the characteristics of casing leakage in different wells and the lithology of lost zones, the
corresponding plugging measures were adopted. Leakage of shallow casing in 7 wells were treated by plugging technology, which proved that
comprehensive plugging technology has better plugging effect on casing leakage and highpressure formation. The results show that water
absorption profile leakage detection and packer leakage detection are still effective means for monitoring shallow casing leakage. Downhole
television, ultrasonic imaging and other casing detection technologies are the future development direction.