【摘要】 大庆龙虎泡油田的主力油层,溶解气油比很高(37.5—86.6m~3/t),固井水泥浆胶凝强度不能阻挡这样高的溶解气侵入水泥环,造成封固质量问题。通过分析大庆龙虎泡油田高台子油层的地质特点,采用了DSK锁水抗窜剂。加入DSK锁水抗窜剂的水泥具有速凝、早强特性,能在固井注水泥完成后的10—20 min内,达到阻止气窜的胶凝强度,解决了大庆龙虎泡油田固井质量问题。更多还原

【Abstract】 The ratio of solution gas to oil is very high in the major oil reservoirs of Longhupao Oilfield, migration of gas into cement sheath often leads to poor cementing. A water block and migration prevention additive DSK was added in the cement slurry in this condition. Fast setting and early strength were detected, and the cement slurry reached a gel strength which is high e-nough to prevent the gas migration 10 to 20 minutes after cementing, thus improved the cementing quality in this area.更多还原