中俄东线楚州盐穴储气库固井难点及对策
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摘要
中国石油天然气集团公司正在建设楚州盐穴储气库来保障中俄东线的调峰和应急供气。楚州地区盐岩埋藏深、夹层多、地质条件复杂,相对于其他盐穴储气库,楚州储气库对固井技术提出了更高的要求。为保证楚州储气库固井质量,针对楚州储气库固井时存在的水泥浆配方筛选困难、提高顶替效率困难、易漏失及易憋堵的特点,提出了适合本地区的水泥浆体系和提高顶替效率、长封固段防漏以及防止环空憋堵等措施。通过现场3口井对固井措施进行了验证,经固井质量和气密封试压检测,3口井固井质量全部合格,能够满足以后储气库生产的需要。提出的固井措施对以后该地区盐穴储气库固井具有很好的借鉴意义。
CNPC is building Chuzhou salt cavern gas storage to ensure peak shaving and emergency gas supply for Sino-Russian Eastern Route Gas Pipeline. Chuzhou salt cavern gas storage is characterized by deep targets,multiple interbedded mudstone formations and complicated geological conditions. Compared with other salt cavern gas storage,Chuzhou gas storage puts forward higher requirements for cementing technology. To ensure the cementing quality,challenges like suitable slurry formulation selection,displacement efficiency improvement,lost circulation and pumping plugging are addressed by proposing proper measures. The cementing technology has been verified in three wells. The cementing quality and gas seal pressure test indicates qualified cementing qualities,which meet the requirements of later gas storage operation. The developed technology is of great significance for the future cementing of the salt cavern gas storage in this area.
CNPC is building Chuzhou salt cavern gas storage to ensure peak shaving and emergency gas supply for Sino-Russian Eastern Route Gas Pipeline. Chuzhou salt cavern gas storage is characterized by deep targets,multiple interbedded mudstone formations and complicated geological conditions. Compared with other salt cavern gas storage,Chuzhou gas storage puts forward higher requirements for cementing technology. To ensure the cementing quality,challenges like suitable slurry formulation selection,displacement efficiency improvement,lost circulation and pumping plugging are addressed by proposing proper measures. The cementing technology has been verified in three wells. The cementing quality and gas seal pressure test indicates qualified cementing qualities,which meet the requirements of later gas storage operation. The developed technology is of great significance for the future cementing of the salt cavern gas storage in this area.
引文
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[2]齐奉忠.金坛地区盐穴储气库固井技术研究与应用[D].北京:中国石油勘探开发研究院,2005.QI F Z. Research and application of cementing technolo-gy for salt cavern in Jintan area[D]. Beijing:Pet-rochina Research Institute of Petroleum Exploration andDevelopment,2005.
[3]李桂平.深井低密度水泥浆体系的设计与应用[J].西安石油大学学报(自然科学版),2009,24(4):42-45.LI G P. Design of low density cement slurry system andapplications of them in Tahe oilfield[J]. Journal ofXi’an Shiyou University(Natural Science Edition),2009,24(4):42-45.
[4]马东华.土库曼亚速尔哲别油田盐层固井工艺技术[J].今日科苑,2010(8):127.MA D H. Salt formation cementing technology in tur-kmenistan azores zhebie oilfield[J]. Modern Sciences,2010(8):127.
[5]郑建翔,周仕明,韩卫华.塔河油田石炭系盐层固井工艺技术[J].西部探矿工程,2006,18(9):59-63.ZHENG J X,ZHOU S M,HAN W H. Salt formationcementing technology in Tahe oilfield[J]. West-ChinaExploration Engineering,2006,18(9):59-63.
[6]齐奉忠,袁进平.盐层固井技术探讨[J].西部探矿工程,2005,17(10):58-61.QI F Z,YUAN J P. Investigation of salt formation ce-menting technology[J]. West-China Exploration Engi-neering,2005,17(10):58-61.
[7]张弛,刘硕琼,徐明,等.低温胶乳盐水水泥浆体系研究与应用[J].钻井液与完井液,2013,30(2):63-65.ZHANG C,LIU S Q,XU M,et al. Research on lowtemperature latex brine cement slurry system[J]. Drill-ing Fluid&Completion Fluid,2013,30(2):63-65.
[8]方春飞,周仕明,李根生,等.井径不规则性对固井顶替效率影响规律研究[J].石油机械,2016,44(10):1-5.FANG C F,ZHOU S M,LI G S,et al. Study on influ-ence law of borehole rugosity on cementing displacementefficiency[J]. China Petroleum Machinery,2016,44(10):1-5.
[9]陈侃.关于S72-22井气层套管固井憋压漏失的原因分析[J].中国科技博览,2014(7):30-31.CHEN K. Analysis of casing pressure and leakage inS72-22 well casing[J]. China Science and TechnologyReview,2014(7):30-31.
[10]王磊. 8589-1井固井施工中发生憋泵事故的分析[J].中国石油和化工标准与质量,2013(22):100.WANG L. Analysis of pump failure in well cementingoperation in 8589-1 well[J]. China Petroleum andChemical Standard and Quality,2013(22):100.
[11]尹学源.地下储气库盐穴及盐层固井技术[J].石油钻采工艺,2007,29(1):92-94.YIN X Y. Cementing techniques for wells with salt for-mations used for underground gas storage[J]. OilDrilling&Production Technology, 2007, 29(1):92-94.
[12]张幸,覃毅,李海伟,等.平顶山盐穴储气库固井技术[J].石油钻采工艺,2017,39(1):61-65.ZHANG X,QIN Y,LI H W,et al. Cementing tech-nology suitable for Pingdingshan salt cavern gas storage[J]. Oil Drilling&Production Technology,2017,39(1):61-65.
[13]张幸,李文魁,兰天,等.平顶山盐田采卤井生产套管固井技术研究[J].中国井矿盐,2015(5):25-26.ZHANG X,LI W K,LAN T,et al. The productioncasing cementing technique for the brine well of Ping-dingshan salt[J]. China Well and Rock Salt,2015(5):25-26.
[14]覃毅,党冬红,刘晓贵,等.盐穴储气库楚资1井244. 5 mm套管固井技术[J].石油钻采工艺,2015,37(2):51-53.QIN Y,DANG D H,LIU X G,et al. 244. 5 mm cas-ing cementing technology on well Chuzi-1 in salt-cav-ern gas storage[J]. Oil Drilling&Production Tech-nology,2015,37(2):51-53.
[15]张晋凯,周仕明,陶谦,等.套管低偏心度下的水泥浆顶替界面特性研究[J].石油机械,2016,44(7):1-6.ZHANG J K,ZHOU S M,TAO Q,et al. Cement dis-placement interface characteristics under low casing ec-centricity in horizontal well[J]. China Petroleum Ma-chinery,2016,44(7):1-6.
[16]石向前,蒋鸿,俞战山.吐哈油田盐膏层综合固井技术[J].石油钻探技术,2002,30(3):27-29.SHI X Q,JIANG H,YU Z S. Comprehensive cemen-ting techniques in salt lime bed in Tuha oilfield[J].Petroleum Drilling Techniques,2002,30(3):27-29.
[17]班凡生,袁光杰,王思中,等.盐穴储气库井筒完整性风险分析与对策[C]∥第四届中国管道完整性管理技术大会,2014:1135-1137.BAN F S,YUAN G J,WANG S Z,et al. Risk anal-ysis and countermeasures of wellbore integrity in saltcavern gas storage[C]∥The 4th China Pipeline In-tegrity Management Technology Conference, 2014:1135-1137.