M油田盐膏层段分级箍选型优化及现场应用  

Selection Optimization and Field Application of Stage Collar in Salt Paste Layer of M Oilf ield

作　　者：刘海涵 汪文星 万圣良 LIU Hai-han;WANG Wen-xing;WANG Sheng-liang(CNOOC International Co.,Ltd.,Beijing 100028,China;Engineering Technology Branch of CNOOC Energy Development Co.,Ltd.,Tianjin 300452,China)

机构地区：[1]中国海洋石油国际有限公司,北京100028 [2]中国海油能源发展股份有限公司工程技术分公司,天津300452

出　　处：《化工管理》2021年第31期194-195,198,共3页Chemical Engineering Management

摘　　要：M油田盐膏层段存在埋深较深、岩性复杂、厚度大、压力窗口窄等诸多挑战,根据当地政府法规要求,盐膏层固井需返至井口,为了降低地层漏失风险、提高固井质量,需要采用双级固井作业。分级箍作为双级固井必须使用的工具,目前主要有机械型、液压型和液压机械双作用型。文章通过分析M油田作业情况,通过比较机械型、液压型,以及液压机械双作用型三种分级箍的优缺点,最终根据现场的油田情况,优选出了液压机械双作用型分级箍。通过后续在新的钻井应用这种分级箍,结果表明,该种液压机械双作用型分级箍能保证及时打开和关得严,为固井质量的提高提供了必要的保证,也为该区块的其他井进行双级固井作业分级箍选型提供了借鉴。M oilf ield has many challenges such as deep burial depth,complex lithology,large thickness,narrow pressure window,etc.According to the regulations of the local government,the cementing in the salt-paste layer needs to be returned to the wellhead.In order to reduce the risk of formation loss and improve the quality of cementing,two-stage cementing operation is needed.As a necessary tool for two-stage cementing,there are mainly mechanical type,hydraulic type and hydraulic mechanical double acting type at present.By analyzing the operation situation of M oilf ield,and comparing the advantages and disadvantages of mechanical type,hydraulic type and hydraulic mechanical double-acting stage collar,this paper f inally selects the hydraulic mechanical double-acting stage collar according to the f ield situation.Through the subsequent application of the stage collar in new Wells,the results show that this kind of hydraulic and mechanical double-acting stage collar can ensure the timely opening and closing of the tightly,which provides necessary guarantee for the improvement of cementing quality,and also provides a guiding signif icance for the selection of stage collar for two-stage cementing operation in other wells in this area.

关 键 词：分级箍选型 双级固井 盐膏层 液压机械双作用式 

分 类 号：TE925[石油与天然气工程—石油机械设备]