????????????????????????????????????Χ?????

在水平井钻井过程中，岩屑在环空中的运移机理与垂直井眼相比存在明显差异，携带岩屑也变得越来越困难，本文运用理论研究成果，对水平井钻井中钻井液流变参数在三个洗井区的携带岩屑效果影响进行了分析，提出了三个洗井区对钻井液流变参数的特殊要求以及定性地确定钻井液流变参数合理范围的方法。最后根据胜利油田和大港油田的９口大斜度井以及水平井的资料，进行统计分析，给出了能获得良好携带岩屑效果的各洗井区钻井液流变参数的

SPECIAL. REQUIREMENT AND REASONABLE RANGE DETERMINATION FOR DRILLING FLUID RHEOLIGICAL PARAMETERS IN ALL HORIZONTAL WELL

??The migration mechanism of detritus in an annulus is so different from that in a verticle wellbore,and so it turns more and more difficult to carry detritus.The effection on carrying detritus in horizontal well drilling of the rheological parameters in three well-flushing zones(the first is in the area of0°??30°;the second is 30°?? 60°;the third is 60°?? 90°)is briefly summerized.Special requirements and reasonable range determination method for the rheological parameters in these three zones are both proposed.Through statistical analysis on data of nine highly deviated wells and horizontal wells in Shengli and Dagang Oil Fields,a reasonable range of drilling fluid rheological parameters is shown out.