大庆龙西油田高台子油层系统保护技术研究

Formation Protection Techniques for Gaotaizi Payzone in Daqing Longxi Oil Field

大庆龙西油田高台子油层为一高含泥低渗透油藏．为高效开发该油田，从研究油层的敏感性着手，系统研究了入井流体对油层岩心的伤害，提高了使用强抑制复合离子聚合物水基钻井液、 Ｐ Ｔ Ａ 和 Ｋ Ｃｌ保护射孔液、 Ｂ Ｃ Ｓ－ ８５１ 瓜胶压裂液、 Ｋ Ｃｌ保护修井液及综合注水质控制等系统技术，大大提高综合开发效宜．

Gaotaizi payzone is a reservoir of high mud shale content, strong water sensitivity, strong acid sensitivity and low permeability. For high-efficiency development of the oilfield, based on the evaluation of its various sensitivities, the formation damages of various arrival well fluids were studied by laboratory tests, and strong inhibitive water base polymer drilling fluid, PTA and KCl perforating fluid, BCS-851 gum fracturing fluid and KCl workover fluid were chosen as optimum arrival well fluids. Except using these optimum arrival well fluids, other reservoir protecting measures were taken in the processes of well drilling, well completion, fracturing, water injection and oil production.