dc指数校正研究  

Dc index correction study

作　　者：付明川 FU Mingchuan(Geo-Logging Company of Sinopec Shengli Petroleum Engineering Co.,Ltd.,Dongying,Shandong 257000,China)

机构地区：[1]中石化胜利石油工程有限公司地质录井公司,山东东营257000

出　　处：《录井工程》2020年第3期8-13,17,共7页Mud Logging Engineering

摘　　要：随着钻井技术的发展更新,用于监测地层压力的可钻性dc指数值波动变大,甚至在同一地层、同一岩性中趋势线变化频繁,导致基于dc指数计算的地层压力值波动异常,使随钻地层压力监测的难度增大。对比发现,可利用同一个井场的多口生产井中各层位可钻性基本相同的特点,分析各钻井参数之间变化关系,通过研究岩石可钻性参数原始计算模型,对原dc指数模型进行了修正。结果表明,修正后的可钻性dcx指数稳定性、准确性提升明显,更适应钻井新工艺技术应用,为随钻地层压力监测提供更准确的数据。With the development and update of drilling technology,the drillability dc index value used to monitor formation pressure fluctuates greatly,and even in the same formation and lithology,the trend line changes frequently,leading to abnormal fluctuation of formation pressure value calculated based on dc index,which makes it more difficult to monitor formation pressure while drilling.It is found that the drillability of each horizon in multiple producing wells of the same well site is basically the same,and the variation relationship of drilling parameters is analyzed.By studying the original calculation model of rock drillability parameters,the original dc index model is modified.The results show that stability and accuracy of the improved drillability dcx index is significantly improved,which is more suitable for the application of new drilling technology and provides more accurate data for formation pressure monitoring while drilling.

关 键 词：DC 指数 可钻性 滑动定向 异常高压 摩阻 DCX 指数 地层压力监测 

分 类 号：TE132.1[石油与天然气工程—油气勘探]