Application of compressive-expansion technology in Xianhe oil production plant

The content of clay is high and it's water sensitive, so it can easily expand during the water injection. In order to solve this problem, the compressive;expansion technology was researched. Based on lab experiments, physical and chemical parameters of the compressive-expansion agent were evaluated including compressive-expansion and anti-swelling properties, core pellets stability and corrosion properties, etc. Also, application was evaluated by constructing two water injection wells. As a result, the compressive-expansion technology can take effect in decompression and augmented injection, and can increase injected wa-ter volume.