海上油田生产井中的负压射孔方式研究
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摘要
疏松砂岩油藏储层岩石强度较低,若采用负压射孔完井方式容易造成地层出砂,甚至砂卡射孔枪。针对海上疏松砂岩油藏,储层射孔段跨度比较大的难点,采用近平衡正压射孔与负压返涌分两趟作业的模式。但根据储层物性特点,可适当的优化射孔管柱结构,实现一趟管柱同时兼顾射孔与负压返涌,达到联作的作业目的,一则有利于降本增效,二则也有利于油层保护,提高油井产能。
Negative pressure perforation completion is incapable of perforating multiple layers of large span because of its technical limits,and is likely to trigger formation sand production and even plug the perforating gun due to the low rock strength in unconsolidated sandstone reservoirs. In this paper, the difficulties of large-span perforation in offshore unconsolidated sandstone reservoirs were pointed out, and the model of the perforating with near-balanced pressure and induced flow with negative pressure was put forward. But according to the reservoir characteristics, the perforating string structure can be appropriately optimized to realize the perforation and negative pressure induced flow with one string at the same time, which can reach the purpose of combination operation. It is beneficial to reduce cost, increase efficiency,protect oil reservoirs and improve the oil well productivity.
Negative pressure perforation completion is incapable of perforating multiple layers of large span because of its technical limits,and is likely to trigger formation sand production and even plug the perforating gun due to the low rock strength in unconsolidated sandstone reservoirs. In this paper, the difficulties of large-span perforation in offshore unconsolidated sandstone reservoirs were pointed out, and the model of the perforating with near-balanced pressure and induced flow with negative pressure was put forward. But according to the reservoir characteristics, the perforating string structure can be appropriately optimized to realize the perforation and negative pressure induced flow with one string at the same time, which can reach the purpose of combination operation. It is beneficial to reduce cost, increase efficiency,protect oil reservoirs and improve the oil well productivity.
引文
[1]王海东,孙新波.国内外射孔技术发展综述[J].爆破器材,2006(3):33-36.
[2]陈福明,胡淑娟,Halleck P M.平衡射孔与负压射孔的对比[J].国外油田工程,2000(7):33-34.
[3]Nwabueze V O,Onikoyi A S,Okoro F O,et al.Sanding in oil well reservoir completions.SPE-163101,at the Nigeria Annual Intemational Conference and Exhibition,Abuja,Nigeria:2012.
[4]李安豪,张俊斌,段永刚.近平衡正压射孔与负压返涌联作技术在海上油田的应用[J].科学技术与工程,2015,15(17):137-140.
[5]黄益疆,肖胜彪.动态负压射孔作业卡枪案例分析[J].长江大学学报(自然版),2013,10(32):114-117.
[6]李拥军,黄继红,刘健,等.一种新的射孔负压设计方法[J].石油钻采工艺,2010,32(2):118-121
[7]任勇,叶登胜,李剑秋,等.易钻桥塞射孔联作技术在水平井分段压裂中的实践[J].石油钻采工艺,2013,35(2):86-90.
[2]陈福明,胡淑娟,Halleck P M.平衡射孔与负压射孔的对比[J].国外油田工程,2000(7):33-34.
[3]Nwabueze V O,Onikoyi A S,Okoro F O,et al.Sanding in oil well reservoir completions.SPE-163101,at the Nigeria Annual Intemational Conference and Exhibition,Abuja,Nigeria:2012.
[4]李安豪,张俊斌,段永刚.近平衡正压射孔与负压返涌联作技术在海上油田的应用[J].科学技术与工程,2015,15(17):137-140.
[5]黄益疆,肖胜彪.动态负压射孔作业卡枪案例分析[J].长江大学学报(自然版),2013,10(32):114-117.
[6]李拥军,黄继红,刘健,等.一种新的射孔负压设计方法[J].石油钻采工艺,2010,32(2):118-121
[7]任勇,叶登胜,李剑秋,等.易钻桥塞射孔联作技术在水平井分段压裂中的实践[J].石油钻采工艺,2013,35(2):86-90.