DETECTION AND TREATMENT FOR OUTSIDE CASING CHANNEL IN TERTIARY INFILL WELL

In view of long hole section,milt-point,disconnected channels of Xing 1～3 block in Daqing oilfield,proposed countermeasure for detect and treatment channels outside tube.According to isolated water testing can find channel position of production water,and confirm with string channel detection method.Selected cyanogens as block agent for tertiary infill well,which has characters of small dosage,less expensive,rapid setting and high intensity,and created a set of technology for block channels use cyanogens rapid reaction with water and frozen characters,blocked channels can resist 50 ℃,15 MPa and with long useful-life,Applied this technology for 30 wells,and success ratio reached to 94.3%.It can treat the channel problem of a well preferably.