资源描述:
《南海深水钻井井控技术难点及应对措施》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第37卷第1期石油钻采工艺Vol.37No.12015年1月OILDRILLING&PRODUCTIONTECHNOLOGYJan.2015文章编号:1000–7393(2015)01–0139–04doi:10.13639/j.odpt.2015.01.036南海深水钻井井控技术难点及应对措施1112叶吉华 刘正礼 罗俊丰 畅元江(1.中海石油(中国)有限公司深圳分公司,广东深圳 518067;2.中国石油大学(华东),山东青岛 266580)引用格式:叶吉华,刘正礼,罗俊丰,等.南海深水钻井井控技术难点
2、及应对措施[J].石油钻采工艺,2015,37(1):139-142.摘要:深水钻井井控存在着海床不稳定、地层破裂压力低、地层压力窗口窄、以及存在浅层气、浅层水流、气体水合物和海底低温等诸多问题。在对国内外深水井控技术充分调研的基础上,针对南海深水钻井井控特点和难点,结合近年南海深水钻井设计和作业实践经验,详细分析了深水钻井井控存在的地层压力窗口窄、溢流监测困难、压井难度大和压井作业时间长、井控设备复杂、存在水合物风险等问题,研究提出了有针对性的解决方案,并以南海深水井为例介绍了深水井控的具体措施。关键词:
3、深水钻井;井控难点;溢流;压井;水合物中图分类号:TE58 文献标识码:BTechnicaldifficultiesandcountermeasuresinwellcontrolofdeepwaterdrillingintheSouthChinaSea1112YEJihua,LIUZhengli,LUOJunfeng,CHANGYuanjiang(1.ShenzhenBranchofCNOOC,Shenzhen518067,China;2.ChinaUniversityofPetroleum,Qingd
4、ao266580,China)Abstract:Duetothedifferencesinsedimentaryenvironment,deepwaterdrillingenvironment,andwellcontrolequipmentofdeepwaterstrata,thewellcontrolofdeepwaterdrillingistrappedinmanyproblemssuchasseabedinstability,lowformationfracturepressure,narrowfor
5、mationpressurevessel,andthepresenceofshallowgasandshallowflow,gashydrates,andsubsealowtemperature.Buildingonafullinvestigationaboutwellcontrolofdomesticandforeigndeepwaterdrillingandconsideringthecharacteristicsanddifficultiesofwellcontrolofdeepwaterdrilli
6、ngintheSouthChinaSea,atargetedsolutionisproposedbasedontherecentdeepwaterdrillingdesignandoperatingexperienceandadetailedanalysisofexistingproblemsinwellcontrolofdeepwaterdrilling,suchasnarrowformationpressurevessel,difficultoverflowmonitoring,difficultand
7、longwellkillingoperation,complexwellcontrolequipment,andthepresenceofhydrates.SpecificmeasuresaboutdeepwaterwellcontrolarealsoprovidedwiththedeepwaterwellsintheSouthChinaSeaasanexample.Theunderstandingandmeasurespresentedinthispapermayprovideareferencefort
8、hewellcontroloperationsofdeepwaterdrillingintheSouthChinaSea.Keywords:deepwaterdrilling;difficultiesinwellcontrol;overflow;wellkilling;hydrate在海洋深水区钻井时,由于海洋沉积环境和作短时间内窜入隔水管内,更容易造成井涌井喷事故。业工况的变化,地层承压能力低,隔水管压井、阻流