摘要
常规射孔地层污染大,不动管柱水力喷射压裂难以保证层间完全封隔,且底封拖动水力射孔压裂压后封隔器解封困难。通过改进水力喷砂器和K344封隔器结构,采用滑套式K344封隔器+水力锚+滑套式水力喷砂器的结构单元,实现了水力射孔分层压裂与机械封隔一体化的管柱设计,达到定点压裂,定点改造,同时保证层间封隔的效果。现场应用于苏25-A井,一趟管柱完成盒8段两层喷射压裂作业,压力平衡后,K344封隔器自动解封,施工安全可靠。改进后的一体化压裂管柱实现了机械封隔、水力射孔、多级压裂联作工艺,具有推广价值。
Conventional perforation has great formation pollution.It is difficult to ensure the complete sealing between layers by hydraulic jet fracturing with immovable string,and it is difficult to unseal the packer after hydraulic perforation fracturing with bottom seal.By improving the structure of hydraulic sandblasting device and K344 packer and adopting the structural units of sliding sleeve K344 packer,hydraulic anchor and sliding sleeve hydraulic sandblasting device,the trip string design integrating hydraulic perforation layered fracturing and mechanical sealing is realized,so as to achieve fixed-point fracturing and fixed-point transformation,and ensure the effect of interlayer sealing at the same time.The technology has been applied in Well Su 25-A to complete two-layer jet fracturing in Member He 8 with one trip string.After the pressure is balanced,K344 packer is automatically unsealed,and the construction is safe and reliable.The improved integrated fracturing string realizes the combined process of mechanical sealing,hydraulic perforation,and multi-stage fracturing,which has popularization value.
作者
骆劲羽
杨晓勇
张鹏
张镇
秦诗涛
杨杰
LUO Jinyu;YANG Xiaoyong;ZHANG Peng;ZHANG Zhen;QIN Shitao;YANG Jie(Engineering Technology Research Institute,CNPC Bohai Drilling Engineering Co.,Ltd.,Tianjin 300280,China;Sulige Gas Field Branch,CNPC GreatWall Drilling Company,Inner Mongolia,017399,China)
出处
《油气井测试》
2021年第5期50-54,共5页
Well Testing
关键词
分层压裂
射孔
K344封隔器
底封拖动
一体化管柱
水力喷砂器
滑套
layered fracturing
perforation
K344 packer
bottom seal dragging
integrated string
hydraulic sand blaster
sliding sleeve
