钾钙基沥青树脂两性离子聚合物重钻井液的研究与应用

试验中,筛选出两性离子型抑制性降粘聚合物XY27做为核心聚合物,并加入弱分散剂、封堵剂、防卡剂、加重剂等成分,配制成钾钙基沥青树脂两性离子聚合物重钻井液,应用于4500~5500m直井和定向井中。应用中表现出了较好的流变性、抑制性、防粘卡效果、高温稳定性和较强的剪切稀释性、滤失造壁性、防塌能力和抗可溶性盐类污染能力。钻井液密度高达1.96g/cm3,机械钻速提高18%。

STUDY AND APPLICATION OF POTASSIUM CALCIUM BASE ASPHALT RESIN AMPHOTERIC ION POLYMER HIGH DENSITY DRILLING FLUID

Through tests,this drilling fluid is compounded of amphoteric ion XY27 as the centerpolymer, dispersant, plugging agent,sticking prevention agent, weighting agent, etc, and used in verticaland directional well of 4500-5500 meters. In the application, it shows the good fluidity, innibity,antisticking effect,stability in high temperature and good shear thinning behavior,filter wall building property, collapse-proof, anti-contamination of salt. The drilling fluid density is high up to 1.96g/cm3,penetration rate is increased by 18%.