低渗透油藏套损井非金属大段贴堵技术研究  

Nonmetallic Large Section Sticking-Plugging Technology for Casing Damaged Wells in Low-Permeability Reservoirs

作　　者：杨琦 王海洲 陈昌奎 赵鹏玉 李德君 黄东安 袁秀杰 Yang Qi;Wang Haizhou;Chen Changkui;Zhao Pengyu;Li Dejun;Huang Dong'an;Yuan Xiujie(CNPC Tubular Goods Research Institute;Zhidan Oil Production Plant,Yanchang Oilfield Co.,Ltd.;No.11 Oil Production Plant,PetroChina Changqing Oilfield Company;Oil and Gas Technology Institute,PetroChina Changqing Oilfield Company)

机构地区：[1]中国石油集团工程材料研究院有限公司,陕西省西安市710077 [2]延长油田股份有限公司志丹采油厂 [3]中国石油长庆油田分公司第十一采油厂 [4]中国石油长庆油田分公司油气工艺研究院

出　　处：《石油机械》2024年第11期36-42,共7页China Petroleum Machinery

基　　金：陕西省高层次人才特殊支持计划-青年拔尖人才项目“高性能膨胀管设计理论与应用基础研究”(00439)。

摘　　要：对于低渗透油藏φ139.7 mm套管因腐蚀发生大段连续套损问题,通常采用φ88.9 mm小套管进行二次固井,但治理后依然存在二次套损隐患,同时其76 mm的内径也不便于后期生产维护。为此,开展玻璃纤维增强树脂基非金属大段贴堵管的结构设计、实物静水压试验及窄间隙高强韧性固井材料优选。研究结果表明:试验管在不同温度下的承压性能、管体和螺纹接头的密封性均能够满足现场需求,设计的固井材料抗压强度达到62 MPa,同时配套贴堵施工作业保障措施,形成了一套完善的非金属大段贴堵工艺技术体系;现场应用7口井,固井成功率100%,固井质量合格率99%以上,平均单井日增油3.2 t,效果显著。研究成果不仅提高了低渗透油藏开发效益,也进一步丰富了套损井治理技术手段。To solve the problem of large section damage of φ139.7 mm casing in low-permeability reservoirs due to corrosion,small(φ88.9 mm)casing is usually adopted for secondary cementing.However,there is still a possibility of secondary casing damage,and the 76 mm inner diameter of small casing is not convenient for maintenance.In this paper,structural design and full-scale hydrostatic test were conducted on glass fiber reinforced resin(GFRR)based nonmetallic large section sticking-plugging pipe,and the cementing material with narrow gap and high obdurability was selected.The results show that the test pipe meets the field requirements in terms of the pressure bearing performance at different temperatures,and the sealing performance of the pipe body and the threaded connector,and the selected cementing material has a compressive strength of 62 MPa.Supported by appropriate safeguard measures for sticking-plugging operation,a set of sophisticated nonmetallic large section sticking-plugging technology was formed.Field application in 7 wells show that the cementing success rate is 100%,the cementing acceptability is over 99%,and the daily incremental production per well is 3.2 t,indicating remarkable achievements.The proposed technology improves the recovery efficiency of low-permeability reservoirs,and also provides additional option for treatment of casing damaged well.

关 键 词：低渗透油藏 套管 套损井 玻璃纤维增强树脂基 贴堵剂 非金属大段贴堵 

分 类 号：TE256[石油与天然气工程—油气井工程]