去污压裂技术研究  

Study on Technology for Against Pollution Treatment.

作　　者：漆雕良[1] 漆国斌 段世峰 张东阳[3] 

机构地区：[1]长庆石油勘探局井下技术作业处,甘肃庆阳745113 [2]西安超新技术有限责任公司,陕西西安710000 [3]长庆油田分公司,陕西西安710021

出　　处：《油气井测试》2004年第3期50-51,共2页Well Testing

摘　　要：钻井、固井在油井近井地带遗留有污染物 ,常规压裂时被压裂液带向油层深处产生二次污染 ,影响油井压裂后的增产效果和稳产。去污压裂技术是在压裂施工前向地层挤入定量活性水清洗、稀释污物 ,再依靠地层及液体的弹性能量将污物吐出 ,并排离封隔器以下井筒部位 ,然后进行压裂施工。现场试验资料证明 ,该技术可以清除或减轻二次污染 ,增产效果明显 。Feculence is remained near the bore hole during the drilling and cementation of well which cause the second pollution from fractured zone to deep formation with conventional treatment to influence on the increasing rate effect and stability.The technology for against pollution treatment is to pour constant active water into formation to wash and lighten feculence before fracture operation,and then by elastic power of formation and fluid to produce out the dirt from the bore hole beneath the packer.field test data proved that it can delete or reduce the second pollution and the result for increasing production rate is obvious and has good applicability.

关 键 词：油层污染 压裂技术 钻井液 污染物 钻具 地层 封隔器 

分 类 号：TE357.1[石油与天然气工程—油气田开发工程]