新型钻固一体化技术的界面特性与现场应用研究

Field Application And Interface Properties of Noval Drilling-Soild Integration Technology.

固井第二界面的胶结强度与水泥浆本身的性能、水泥浆与泥饼胶结面的强度、泥饼本身的强度、泥饼与地层之间胶结面的强度都有关。在系统分析井筒二界面特性和影响因素基础上,通过在常规钻井液中添加活性材料、界面增强剂等转化而成的钻固一体化工作液,有效地克服了传统固井水泥浆与钻井液及泥饼不相容的难题,通过物理和化学激活,提高了地层-泥饼-水泥环的胶结亲合力,最终将钻井液滤饼由水泥环胶结质量薄弱层转化为增强层,实现了提高二界面封隔质量的目的。该技术在热采生产井、生产井、定向井斜井段进行了多次应用,与邻井的现场应用效果对比,一体化工作液技术可以有效解决层间窜流问题,满足油田改造和增产措施的需要。

The second interface ofborehole is great change interface,which is often occurred to gas water channeling weaknesses. And its cementing strength is related to slurry itself,the bond strength between cement slurry and the cake surface,mud cake itself,and strength between mud cake and formation.On the basis of second interface characteristic,and adding active material,interface strengthening agents to form drill-solid fluid,it was effectively overcome the incompatible problems of traditional cement slurry between drilling fluid and mud cake.Through physical and chemical activation,formation-cake -cement cementation affinity increased,and eventually drilling fluid filter cake turned into enhancement layer from the weak layer of cement bond quality ring to improve the quality of the second packer interface.The technology was used several times in the thermal recovery wells,production wells,directional wells and made a contrast with the adjacent wells. The technology of this integared working fluid can solve the problem of interlayer channeling,and meet the needs of oil upgrading and production improvement