孔隙压力传递评价纳米材料封堵页岩效果  

Application of Pore Pressure Transfer Equipment in Evaluating the Effect of Shale Plugging of Nano-materials

作　　者：张伟[1] 李文波[1] 项涛[1] 

机构地区：[1]中海油田服务股份有限公司油田化学事业部,河北廊坊065201

出　　处：《长江大学学报（自科版）（中旬）》2016年第3期50-52,5,共3页Journal of Yangtze University(Nature Science Edition)

摘　　要：常规评价方法不能评价纳米粒子在页岩中的封堵效果,而孔隙压力传递试验装置可以评价在真实页岩中压力的传递速度,准确地测定纳米粒子封堵页岩效果。取美国TerraTek公司的PIERREⅡ页岩岩心,进行岩心矿物含量和SEM分析,可知PIERREⅡ页岩岩心孔喉尺寸属微米及纳米级别。利用孔隙压力传递试验装置,通过测定页岩渗透率变化,评价纳米材料封堵页岩效果。试验结果表明,在盐水与基浆中加入纳米材料都能明显降低页岩中孔隙压力传递速率,使页岩渗透率降低,说明纳米材料封堵页岩中微米及纳米级孔喉效果明显。该研究对页岩封堵具有很好的指导作用,能够帮助解决页岩段钻进过程中出现的井壁稳定等难题。The conventional method could not evaluate the shale plugging effect of nano particles,while a pressure transmission tester could evaluate the pressure transmission velocity in actual shale and accurately measure the shale plugging effect of the nano particles.The mineral content and SEM were analyzed by using PIERREⅡ Shale Core from TerraTek Company,USA,it was presented that the shale core throat size was macro-nano and nano-grades.The effectiveness nano-materials was demonstrated by measuring the change of shale permeability and evaluating the its plugging effect.The experimental results show that pore pressure transmission velocity is reduced by adding nanomaterials in both brine and mud,thus shale permeability is reduced,which indicates that porethroats at micrometer scale and nanometer scale are effectively plugged by nano-materials.The study can direct shale plugging,also it is beneficial for solving the problem of borehole stability in drilling the shale section.

关 键 词：孔隙压力传递 页岩渗透率 纳米材料 封堵 

分 类 号：TE254.4[石油与天然气工程—油气井工程]