Two retarded micellar acids are prepared from a commercial wax deposits remover,KY-3,which is widely used in Changqing Oil Fields,two concentrated acids,W-P and W-I,and a selected surfactant,RJH-103,on the basis of phase diagraphs:ZHJ-1(with W-P) for removing reservoir blockage in oil production wells and ZHJ-3-in water injection wells.

To solve trouble problems of salts precipitations in reservoirs in Changqing Oil Fields, a scale removing compound, CQ-1, is developed.

Application of EILog-05 logging system in ChangQing oilfield;

Study and Application of PDC Bits Suitable for Longdong Area of Changqing Oilfield;

Application of MITMTT Combination Technology for Casing Detection in Changqing Oilfield;

Study on Technique of Enhancing Cementing Quality and Preventing Casing Corrosive in Changqing Oil Field;

1 Extract Oil Branch of Changqing Oil Field has been devoting itself to the innovation and creativity of the labor organizing style,the labor management model and the labor utilizing.

Changqing oil field is a low and extra low permeability oil field developed mainly under waterflooding.

core samples collected from Yushulin,Chaoyanggou and Toutai oilfields to the east of Daqing placanticline have been tested with the CMS-200 porosity and permeability tester.