全过程欠平衡技术在陈古1-1井的应用  

Application of Whole-process Under-balanced Drilling Technique to Chengu 1-1 Well

作　　者：杜新军[1] 

机构地区：[1]中国石油辽河油田分公司钻采工艺研究院,辽宁盘锦124010

出　　处：《石油工业技术监督》2012年第10期43-45,共3页Technology Supervision in Petroleum Industry

摘　　要：陈古1-1井采用合理的工程设计参数,满足实现全过程欠平衡的条件;采用套管阀技术,解决欠平衡钻井中钻柱易被顶出井口、钻柱无法二次入井等问题;通过适时调节节流阀来调节立压,从而控制井底欠压值始终在合理的范围之内。陈古1-1井通过采用全过程欠平衡技术,有效保护油气层,提高单井产量,提高机械钻速。Chengu 1-1 well has rational engineering design parameters, and it meets the needs of the conditions of whole-process under-balanced drilling. The problems that drilling string is easily ejected from wellhead and cannot enter to hole again in under- balanced drilling are solved by using casing valve technique. The downhole under-balance pressure value is controlled in a rational range by timely adjusting standpipe pressure using throttle valve. The application of whole-process under-balanced drilling technique to Chengu 1-1 Well effectively protects oil/gas reservoir, increases penetration rate and the output of single well.

关 键 词：全过程欠平衡钻井 欠压值 套管阀 节流阀 

分 类 号：TE249[石油与天然气工程—油气井工程]