俄罗斯远东亚极地海域钻井取心技术  

Drilling and coring technologies for polar offshore areas of Russia Far East

作　　者：王建宁[1] 艾中华[1] 刘畅[1] 沈海超[1] 田院生 万州亮[1] 

机构地区：[1]中国石化集团国际石油勘探开发有限公司,北京100026

出　　处：《石油钻采工艺》2015年第2期35-38,共4页Oil Drilling & Production Technology

基　　金：中国石化集团国际石油勘探开发有限公司项目"北维尼凝析气田大位移井钻完井技术研究"(编号:RS012009)

摘　　要：鄂霍次克海位于俄罗斯远东,属于亚极地气候环境。在钻井工程中降低取心作业时间、提高取心作业效率成为一个紧迫的课题。该地区取心地层中含有大量泥质粉砂岩、硬质夹层和砾石夹层,可钻性差,机械钻速低,取心难度大。通过优选取心钻头、岩心爪和取心筒等关键工具,制定合理的施工方法,提高了取心作业效率,减少了下钻次数。在3口探井的应用中,取心作业时间均能控制在设计范围之内,确保了钻井平台能在安全窗口内撤离井场,同时将取心收获率保持在90%以上。该技术的成功应用对同类区块今后的取心作业有积极的指导意义。Okhotsk Sea is in the Far East of Russia, belonging to sub-polar climate. Reducing coring time and improving coringefficiency during drilling operation has become an urgent topic. The coring formation in this area contains large amount of argillaceoussiltstone, hard interbeds and conglomerate interbeds, resulting in poor drillability, low ROP and difficulty in coring. Through optimizingkey tools like coring bit, core catcher and coring barrels and by formulating proper coring method, the efficiency of coring operationwas improved and the number of drillings was reduced. In its application in three exploration wells, the coring time could be controlledwithin the designed range, which ensured that the drilling platform could move away from the wellsite within the safe window and alsoensured that the core recovery was kept over 90%. The successful application of this technology provides positive guiding significancefor coring operations in the similar blocks.

关 键 词：亚极地 海洋钻井 取心技术 取心钻头 鄂霍次克海 

分 类 号：TE243[石油与天然气工程—油气井工程]