LG37井φ177.8mm×φ193.7mm复合尾管悬挂固井技术
|
摘要
LG37井在四开钻进过程中钻遇漏失层、大段膏盐层、高压盐水层,井下条件十分复杂。现场决定四开钻至5900m中途完钻,下φ177.8mm×φ193.7mm复合尾管固井。采用一级三凝加砂、防窜、防漏、抗盐加重水泥浆体系,该体系具有良好的控制失水和防漏失、防窜性能;采用一次注水泥至设计返高,下入特殊厚壁高抗挤、抗硫的φ193.7mm套管至膏盐层段,在盐水层位下入管外封隔器等工艺,圆满完成了作业。该井复合尾管悬挂固井的成功经验可为同类复杂井固井施工提供借监。
Downhole conditions of LG37 well are very complicated, because leakage layer, massive gypsum-salt layer, and highpressuresaline layer may be encountered during the drilling process. So it is determined to complete drilling when drilled to the depth of5900 m, φ177.8 mm×φ193.7 mm composite liner is applied to cementing.The first grade triple-setting sand, anti-channeling, leak-proof,salt-resisting heavyweight cement slurry system is applied to the cementing. The cement slurry system has favorable performance incontrolling water loss, leakage loss and anti-channeling. Cementing operations are completed successfully, by applying the technologiesof primary cementing to top cement, making anti-sulfur φ193.7 mm casing with extraordinary thickness and high resistance to extrusioninto the gypsum-salt layer, and running external casing packer to the saline layer. The successful experience in composite liner hangingand cementing could provide reference for cementing operations in similarly complex wells.
Downhole conditions of LG37 well are very complicated, because leakage layer, massive gypsum-salt layer, and highpressuresaline layer may be encountered during the drilling process. So it is determined to complete drilling when drilled to the depth of5900 m, φ177.8 mm×φ193.7 mm composite liner is applied to cementing.The first grade triple-setting sand, anti-channeling, leak-proof,salt-resisting heavyweight cement slurry system is applied to the cementing. The cement slurry system has favorable performance incontrolling water loss, leakage loss and anti-channeling. Cementing operations are completed successfully, by applying the technologiesof primary cementing to top cement, making anti-sulfur φ193.7 mm casing with extraordinary thickness and high resistance to extrusioninto the gypsum-salt layer, and running external casing packer to the saline layer. The successful experience in composite liner hangingand cementing could provide reference for cementing operations in similarly complex wells.
引文
[1]殷积峰,李军,谢芬,等.川东二叠系生物礁油气藏的地震勘探技术[J].石油地球物理勘探,2007,42(1):70-75.YIN Jifeng,LI Jun,XIE Fen,et al.Seismic exploration tech-nology of Permian biohermal reservoir in eastern Sichuan area[J].Oil Geophysical Prospecting,2007,42(1):70-75.
[2]刘成川,向丹,黄大志.川东北PG构造三叠系飞仙关组台缘鲕滩储层特征[J].天然气工业,2005,25(7):17-19.LIU Chengchuan,XIANG Dan,HUANG Dazhi.Platform edge oolitic beach reservoir characteristics of feixianguan formation of triassic in PG structure in Northeast Sichuan[J].Natural Gas Industry,2005,25(7):17-19.
[3]李诚铭.新编石油钻井工程实用技术手册[M].北京:中国知识出版社,2006-08.LI Chengming.A new practical and technical petroleum drilling engineering manual[M].Beijing:China Knowl-edge Press,2006-08.
[4]邹建龙,朱海金,张清玉,等.BCE-200S防漏外加剂体系的研究与应用[J].钻井液与完井液,2007,24(4):47-49.ZOU Jianlong,ZHU Haijin,ZHANG Qingyu,et al.Study on and application of the lost circulation material BCE-200S[J].Drilling Fluid&Completion Fluid,2007,24(4):47-49.
[5]邹建龙,屈建省,吕光明,等.纤维水泥堵漏性能评价研究[J].钻井液与完井液,2007,24(2):42-44.ZOU Jianlong,QU Jiansheng,LV Guangming,et al.Labo-ratory evaluation of fiber cement in resuming lost circula-tion[J].Drilling Fluid&Completion Fluid,2007,24(2):42-44.
[2]刘成川,向丹,黄大志.川东北PG构造三叠系飞仙关组台缘鲕滩储层特征[J].天然气工业,2005,25(7):17-19.LIU Chengchuan,XIANG Dan,HUANG Dazhi.Platform edge oolitic beach reservoir characteristics of feixianguan formation of triassic in PG structure in Northeast Sichuan[J].Natural Gas Industry,2005,25(7):17-19.
[3]李诚铭.新编石油钻井工程实用技术手册[M].北京:中国知识出版社,2006-08.LI Chengming.A new practical and technical petroleum drilling engineering manual[M].Beijing:China Knowl-edge Press,2006-08.
[4]邹建龙,朱海金,张清玉,等.BCE-200S防漏外加剂体系的研究与应用[J].钻井液与完井液,2007,24(4):47-49.ZOU Jianlong,ZHU Haijin,ZHANG Qingyu,et al.Study on and application of the lost circulation material BCE-200S[J].Drilling Fluid&Completion Fluid,2007,24(4):47-49.
[5]邹建龙,屈建省,吕光明,等.纤维水泥堵漏性能评价研究[J].钻井液与完井液,2007,24(2):42-44.ZOU Jianlong,QU Jiansheng,LV Guangming,et al.Labo-ratory evaluation of fiber cement in resuming lost circula-tion[J].Drilling Fluid&Completion Fluid,2007,24(2):42-44.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心