海上热采井筒隔热工艺管柱研制与应用
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摘要
海上稠油热采井埋藏深,而且多为水平井。在注汽过程中,采用隔热油管+环空注氮气的井筒隔热工艺,向地层中注入大量氮气,使作业成本增加、气窜风险加大;隔热油管接箍不具有隔热功能、注汽管柱存在"贴壁"现象,导致热损失增加。研制了海上热采井筒隔热工艺管柱及配套工具。工艺管柱主要由热敏封隔器、隔热型伸缩管、隔热型油管扶正器及隔热型接箍组成。该工艺管柱能够节省作业成本、提高注汽管柱的隔热效果、减少井筒热损失、保护套管和水泥环,提高海上稠油热采的安全性、经济性以及有效性。
The offshore heavy oil thermal recovery wells are normally deeply buried and mostly horizontal wells. During the process of steam injection, the heat insulation technology of insulated tubing and ring nitrogen injection has been adopted with many inadequacies, such as increasing the cost of operation, the risk of gas channeling by injecting a large amount of nitrogen into the stratum, increase of heat due to the missing heat insulation function of the insulated tubing hoop and the existence of adherence. The technique string and supporting tools of wellbore heat insulation technology string for offshore thermal recovery wells have been developed, which consists of thermal packer, heat insulated compensator, heat insulated tubing centralizer and heat insulated heat-insulation coupling. The technique strings can save the operation cost, improve the heat insulation effect of the steam injection pipe column, reduce the heat loss of the wellbore, protect the casing and cement ring and improve the safety, economy and effectiveness of the thermal recovery of the offshore heavy oil.
The offshore heavy oil thermal recovery wells are normally deeply buried and mostly horizontal wells. During the process of steam injection, the heat insulation technology of insulated tubing and ring nitrogen injection has been adopted with many inadequacies, such as increasing the cost of operation, the risk of gas channeling by injecting a large amount of nitrogen into the stratum, increase of heat due to the missing heat insulation function of the insulated tubing hoop and the existence of adherence. The technique string and supporting tools of wellbore heat insulation technology string for offshore thermal recovery wells have been developed, which consists of thermal packer, heat insulated compensator, heat insulated tubing centralizer and heat insulated heat-insulation coupling. The technique strings can save the operation cost, improve the heat insulation effect of the steam injection pipe column, reduce the heat loss of the wellbore, protect the casing and cement ring and improve the safety, economy and effectiveness of the thermal recovery of the offshore heavy oil.
引文
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[10] 张波.稠油热采井筒隔热技术研究与应用[J].化学工程与装备,2012(9):98-100.
[2] 唐晓旭,马跃,孙永涛.海上稠油多元热流体吞吐工艺研究及现场试验[J].中国海上油气,2011,23(3):185-188.
[3] 顾启林,孙永涛,马增华,等.RX361-210型热敏封隔器的研制与试验[J]. 石油机械,2017,45(8):50-53.
[4] 王通,孙永涛,邹剑,等.海上多元热流体高效注入管柱关键工具研究[J]. 石油钻探技术,2015,43(6):93-97.
[5] 王忠华,刘晓燕,赵海谦.无衬套真空隔热油管接箍视导热系数模拟计算[J].油气田地面工程,2009,28(1):39-40.
[6] 刘花军,孙永涛,马增华,等.海上热采隔热型井下工具的研制[J].石油机械,2015,43(1):69-72.
[7] 张毅,翟勇,姜泽菊,等.注汽工艺管柱对热采井套损的影响[J]. 石油机械,2004,32(2)1:26-29.
[8] 沈战岭.稠油热采井筒隔热技术的研究和应用[J]. 石油地质与工程,2007,21(2):94-96.
[9] 陈红梅.蒸汽驱高温长效隔热注汽管柱的研制[J]. 石油钻采工艺,2003,25(增刊):24-26.
[10] 张波.稠油热采井筒隔热技术研究与应用[J].化学工程与装备,2012(9):98-100.