TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractThe Heidrun Field, located on the Haltenbanken area, is one of the major fields which came on stream in the Norwegian Sea since 1995. At peak production the field is capable of producing 38,000 m 3 of oil and 6 MSCM gas per day. It also takes in 22,000 m 3 of injection water each day. The field is characterised by the large clay content in its three formation sands Fangst, Tilje and Åre. Most of the producing wells are installed with gravel pack or screens due to poor sand consolidation. The reservoir has a bottom hole temperature of 85 o