中东某区块盐岩地层蠕变缩径的力学分析与应用  

MECHANICS ANALYSIS AND APPLICATION OF SALT CREEP CLOSURE IN MIDDLE EAST REGION

作　　者：马德新[1] 李嗣贵 李自立[1] 杨鸿波[1] 宋林松[1] 

机构地区：[1]中海油田服务股份有限公司 [2]中海石油伊拉克有限公司

出　　处：《钻采工艺》2013年第4期23-25,134,共3页Drilling & Production Technology

基　　金：中海油田服务股份有限公司科技攻关项目"米桑油田盐膏层钻井工艺技术研究"(编号:ZJB12YF004)

摘　　要：在统计中东某区块钻井过程中主要事故和复杂情况的基础上,发现盐岩蠕变、软泥岩流动的控制是解决复合盐膏层钻井技术难题的关键。文章应用Norton蠕变模型,建立了盐岩地层井眼半径随上覆岩层压力、钻井液密度、地层温度、裸露时间变化的解析解,并由此导出了一定蠕变速率下钻井液密度的确定方法。最后结合中东某区块的实钻资料绘制出了推荐现场使用的盐岩地层钻井液密度图版,为该地区能有效抑制因盐岩蠕变发生缩径卡钻等复杂事故提供了理论依据,对该地区井深2950m左右的钻井液密度的确定提出了具体方案,对现场有一定的指导意义。Based on the statistics of mail drilling problems in the middle East region,the controlling of salt creeping and soft-mudstone flowing is the key to solve the drilling accident and complex wellbore problems.Applying the Norton creep model,the analytic solutions of borehole radius change with the time,drilling fluid density,stress in the overlying strata,and temperature were established,and the methods of determining the drilling fluid density under the condition of one creep speed were deduced.Combining the drilling data in middle East region,the chart of determining the drilling fluid density used in salt formation was drawn,it could provide theoretical basis for restraining effectively salt rock creeping.

关 键 词：中东 盐岩地层 蠕变缩径 力学分析 应用 

分 类 号：TE21[石油与天然气工程—油气井工程]