... Abstract Most of oil fields in China have stepped into the middle or later stage of waterflooding life, and oil wells begin to appear above water. In conventional acid treatment, acid fluid always flows into the pore path with high water saturation firstly, and broadens the pore path filled...

... Abstract This paper describes sand control failure of a well in Bohai Bay which has experienced four workovers and one acid treatment. This well adopted cased-hole premium screen completion initially, changed to another premium screen completion in the 2nd workover and gravel packed in the 4th...

... are included to illustrate the benefits that can be derived from properly administered acid treatments. Introduction Productivity improvement is the process of increasing production from oil or gas wells by removing flow restrictions that exist near the wellbore and/or by altering the pattern of flow...