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如何提高小井眼固井质量是困扰钻井行业多年的老问题。中原油田针对小井眼井段易漏失、井深、井下温度高、钻井液密度高、地层存在多套压力层系等特点，从小井眼钻进阶段，通过使用双心ＢＤＣ钻头、调整钻井液性能、水泥浆设计、先期堵漏等各种工艺措施，为小井眼固井提供了良好的先期条件。同时，在注水泥施工中，采取优选注替排量、选择合适的隔离液、加旋流扶正器使套管串居中等手段，以提高水泥浆顶替效率，并进一步推广应用压稳高压油气层的四大技术及Ｇ１０１高强度低密度水泥浆体系，小井眼固井技术满足了固井质量要求，并取得良好的效果。

SLIM HOLE CEMENTING TECHNIQUE IN ZHONGYUAN OIL FIELD

How to improve the quality of slim hole cementing is a difficult problem of perplexing well drilling.Aimed at the characteristics of easy leakage,deep well,high temperature in downhole,multiple series of strata with various pressures etc.of the slim hole in Zhongyuan Oil Field,the favourable conditions are provided for slim hole cementing by using the various technology such as two core BDC bit,adjusting drilling fluid performance,slurry design,etc.In the operation of cementing,the means of optimizing injection substitute flow rate,selecting suitable spacer,centring casing string with cyclone centralizer etc.are applied to improve slurry displacement rate.The 4 techniques for the kill job of high pressure oil gas bed and G 101 slurry system with high inten sity and low density are further spreaded.