[1]吴志均,唐悦伟,任源峰,等. 注热氮及乙醇段塞解除凝析气藏污染工艺[J].油气井测试,2021,30(04):56-61.[doi:10.19680/j.cnki.1004-4388.2021.04.010]
　WU Zhijun,TANG Yuewei,REN Yuanfeng,et al.The technology of eliminating formation damage in condensate reservoirs by injecting hot nitrogen and ethanol[J].Well Testing,2021,30(04):56-61.[doi:10.19680/j.cnki.1004-4388.2021.04.010]
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 注热氮及乙醇段塞解除凝析气藏污染工艺()
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《油气井测试》[ISSN:1006-6977/CN:12-1485/TE]

卷:
30卷
期数:
2021年04期
页码:
56-61
栏目:
出版日期:
2021-08-25

文章信息/Info

Title:
The technology of eliminating formation damage in condensate reservoirs by injecting hot nitrogen and ethanol
文章编号:
1004-4388(2021)04-0056-06
作者:
 吴志均1; 唐悦伟2; 任源峰1; 李兴华2; 陈世堂1; 张友义1
 1.中国石油勘探开发研究院工程技术研究所 北京 100083
2.中国石油集团渤海钻探工程有限公司油气井测试分公司 河北廊坊 065007
Author(s):
 WU Zhijun1;  TANG Yuewei2;  REN Yuanfeng1;  LI Xinghua2;  CHEN Shitang1;  ZHANG Youyi1
1.Engineering Technology Institute, PetroChina Research Institute of Exploration and Development, Beijing 100083, China
2.Well Testing Company, CNPC Bohai Drilling Engineering Co., Ltd., Langfang, Hebei 065007, China
关键词:
 ; 凝析气藏;  反凝析伤害;  水锁伤害;  高温热氮;  乙醇段塞;  焖井
Keywords:
 ; condensate gas reservoir;  retrograde condensation damage;  waterlocking damage;  hot nitrogen;  ethanol slug;  shutin the well for soaking
分类号:
TE353
DOI:
10.19680/j.cnki.1004-4388.2021.04.010
文献标志码:
B
摘要:
 凝析气藏在开发过程中易遭受反凝析伤害和水锁伤害，严重影响气井产量。注热氮及乙醇段塞解除凝析气藏污染工艺根据气藏反凝析和水锁两类主要伤害的特点，向气层泵注高温高压氮气和乙醇段塞，焖井和返排后，转入正常生产，有效解除凝析气藏污染；提出热氮生产流程、工艺参数、主体设备和注入量计算方法等关键技术，分析该工艺的技术优势和工艺要求，确定施工步骤。对某碳酸盐岩凝析气藏X井进行先注热氮解除反凝析污染，后注乙醇段塞解除水锁，再注氮气吞吐的现场试验措施后，产气量增加669倍，产液量增加292倍，气井产能得到明显提高。该工艺在具有反凝析伤害和水锁伤害的凝析气藏中具有广泛应用价值。
Abstract:
 In order to eliminate the retrograde condensate damage and water lock damage suffered during the development of condensate gas reservoirs and increase gas well production, a new technology of pumping thermal nitrogen and ethanol slug to eliminate the formation damage of condensate gas reservoirs is proposed. According to the characteristics of the two main types of damage of gas reservoir, i.e. retrograde condensation and waterlocking, high temperature and high pressure nitrogen and ethanol slugs are pumped into the gas reservoirs, shutin the well for soaking, open the well and flow back, and finally turn to normal production, which can effectively eliminate the formation damage of condensate gas reservoirs; meanwhile, the key technologies such as hot nitrogen production process, process parameters, main equipment and injection calculation method are put forward, the technical advantages and process requirements are analyzed, and the operational steps are determined. After performed field test in Well X of a carbonate condensate gas reservoir with first pumping hot nitrogen to eliminate the retrograde condensate damage, then pumping ethanol slug to release water lock damage, and then pumping hot nitrogen,
the day production of gas and liquid was the gas and liquid of production were increased by 669 and 292 times respectively, and the productivity of gas wells had been significantly improved. The process can be widely used in condensate gas reservoirs with retrograde condensate damage and water lock damage.

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备注/Memo

备注/Memo:
2021-02-12收稿，2021-06-12修回,2021-06-18接受,2021-08-20网络版发表
十三五课题“丝绸之路经济带大型碳酸盐岩油气藏开发关键技术”（2017ZX05030）
吴志均，男，1964年出生，博士，高级工程师，2002年6月毕业于成都理工大学油气田开发工程专业，现主要从事完井、试油研究和管理工作。电话：010-83595968；Email：wuzhijun@petrochina.com.cn，通信地址：北京市海淀区学院路20号910信箱工程技术研究所，邮政编码：100083。
更新日期/Last Update: 2021-09-14