姬塬油田注聚井复合解堵技术研究与应用  

Research and application of compound plugging removal technology for polymer injection wells in Jiyuan oilfield

作　　者：张斌 孙海波 安全成 ZHANG Bin;SUN Haibo;AN Quancheng(CCDC Drilling and Production Engineering Technology Research Institute,Xi'anShaanxi 710018,China;National Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Fields,Xi'an Shaanxi 710018,China;Oil Production Plant 5 of PetroChina Changqing Oilfield Company,Xi'an Shaanxi 710200,China)

机构地区：[1]川庆钻探工程有限公司钻采工程技术研究院,陕西西安710018 [2]低渗透油气田勘探开发国家工程实验室,陕西西安710018 [3]中国石油长庆油田分公司第五采油厂,陕西西安710200

出　　处：《石油化工应用》2023年第3期24-27,共4页Petrochemical Industry Application

基　　金：中国石油集团川庆钻探科技项目“长庆老油田增能驱油及脉冲解堵技术研究”,项目编号:CQ2021B-20-1-4。

摘　　要：针对姬塬油田大规模聚合物微球调驱后,长8超低渗油藏注聚水井高压欠注问题,提出“物理+化学”复合解堵增注思路,建立电脉冲复合解堵工艺技术。配套研发放电装置一次放电能量可达5 kJ,放电6~10次/分钟;配套解堵液稳定工作时间10 h以上,对现场聚合物溶解率达到87.4%。2022年现场试验2口井,平均单井降压4.3 MPa,累计增注超过5000 m3,有效期均在150 d以上。该技术的成功试验为超低渗油藏注聚井欠注治理提供新的技术对策。Aiming at the problem of high pressure underinjection of polymer injection wells in Chang 8 ultra-low permeability reservoir after large-scale polymer microsphere profile control and flooding in Jiyuan oilfield,the idea of"physical-chemical"compound plugging removal and injection increase was proposed,and the electric pulse compound plugging removal technology was established.The primary discharge energy of the supporting research and development discharge device can reach 5 kJ,discharge 6~10 times/min,the stable working time of the supporting plug removal fluid is more than 10 hours,and the polymer dissolution rate on the site reaches 87.4%.In 2022,two wells were tested in the field,the average pressure drop of a single well was 4.3 MPa,the cumulative injection increase was more than 5000 m3,and the validity period was more than 150 days.The successful test of this technology provides new technical ideas and countermeasures for the treatment of under-injection of water wells in ultra-low permeability reservoirs.

关 键 词：注聚井 姬塬油田 复合解堵 电脉冲 

分 类 号：TE358.5[石油与天然气工程—油气田开发工程]