Hollow water distribution and separate injection technology applied in Dagang Oilfield

The high pressure of formation pressure for high-pressure deep deviated injection wells and the severely corroded and scaled well bore in Dagang oilfield make conventional downhole separate injection, running and pulling as well as measuring and allocating difficult, so ground oil casing separation injection is used as the main technology. The research and experiment on measuring and adjusting combination technology that matches with hollow water distribution and separate injection is carried out in an attempt to improve injection development effect. This technology, featuring visual and reliable measuring data, high measuring accuracy and high efficiency of measuring and adjusting, etc. incorporates separate injection, measuring and allocating, and it is preferably operable and applicable for downhole separate injection of high temperature deep deviated well. Field test on more than 20 wells indicates that this technology is worthy of application and popularization.