Research and application of anti-water migration technology of liner cementing for the adjustment well in a certain block of Bohai Oilfield

The cement bonding quality in the tailpipe cementing of adjustment wells in a certain block of Bohai Oilfield is poor, in order to improve the cement quality of this type of wells, this study analyzed the cement bonding quality issues in the cementing of adjustment wells in the block. The characteristics of poor cement bonding quality in the producing layer and obvious water invasion were identified. Additionally, research was conducted on the reasons of water migration in adjustment wells cementing and anti-water migration technologies both domestically and internationally. Anti-water migration process measures and cement slurry systems suitable for offshore adjustment well tailpipe cementing were designed. After application in the block, the cement bonding quality was significantly improved. This proves that the anti-water migration technology for adjustment well liner cementing job can effectively seal the producing layer with a significant anti-water migration effect and has good promotion significance for this type of wells in the future.