大位移井用气泡携屑剂的研制与效果评价  

Research and Evaluation on Bubble Sweep Used for Extended Reach Well

作　　者：蒋官澄[1,2] 黎凌[1,2] 许伟星[1,2] 李颖颖[1,2] 

机构地区：[1]中国石油大学(北京)石油工程教育部重点实验室 [2]中国石油大学(北京)油气资源与探测国家重点实验室

出　　处：《钻井液与完井液》2013年第1期5-8,89,共4页Drilling Fluid & Completion Fluid

基　　金：国家自然科学杰出青年科学基金项目(50925414);国家科技重大专项(2011ZX05009-005-03A);国家自然科学基金项目(51074173)

摘　　要：大位移井水平段岩屑受重力作用易于在底部沉积,导致井下复杂情况发生甚至整口井报废。针对上述问题,实验室合成一种携屑剂FGC-1。室内对其进行了评价,结果表明:经FGC-1处理过的岩心润湿反转效果良好,岩心表面由亲油弱亲水转变为疏油疏水而优先和气体接触;与普通表面活性剂相比,FGC-1可使气泡持久地黏附在岩屑表面;FGC-1浓度为0.4%时,使得粒径为0.90～2.00 mm的岩屑能达到最佳携带效果;FGC-1与钻井液的配伍性好;用模拟大位移井井眼环空中岩屑携带运移情况的装置评价结果表明,在盐水钻井液中粒径为0.90～2.00 mm的岩屑有77.2%被携带到出水口位置,可见FGC-1起到了高效携带岩屑颗粒的作用。In horizontal section,cuttings tend to settle down to the bottom side of borehole,which will lead to downhole troubles and even ruin the whole well.A novel sweep FGC-1 is synthesized in this paper,and the experimental results show that after treated by FGC-1,the wettability of core surface is converted to amphiphobic,the effect of wettability reversal is perfect and preferentially attached to gas.Compared to other common surfactants,FGC-1 can make bubble adhere on core surface.With the concentration of 0.4%,the sweeping effect is the best that diameters of cuttings are 0.90～2.00 mm,also the FGC-1 has good compatibility with drilling fluid.Tested by the simulation device,the cuttings of 0.90～2.00 mm that accounts for 77.2% in salt drilling fluid,can be transported to the outlet position effectively.

关 键 词：大位移井 井眼净化 携屑剂 气泡 润湿反转 黏附性 流变性 

分 类 号：TE254.4[石油与天然气工程—油气井工程]