CURRENT AND COMPREHENSIVE REGULATION MEASURES OF CASING DAMAGE IN JIDONG OILFIELD

Being a typical complex blocked reservoir,Jidong Oilfield exists serious casing damage in producers and injectors.Up to the end of 2002,22.4 percent wells of the total were destroyed.The casing damage mechanism has been demonstrated by means of comprehensive analysis to the basic condition of casing failure,and some well-repairing technologies have been used for these casing deformation wells,such as casing withdrawal-altering in,particulate cement plugging,casing patch,deformation interval milling followed by pipe liner running in and pressuring sand control,little diameter-packers for separate injection wells and water plugging wells,etc.By the methods above,the damage wells have partially put on production once more,the well utilization factor increasing.The comprehensive regulation measures bring in a magnificent result.