[an error occurred while processing this directive] [an error occurred while processing this directive] [an error occurred while processing this directive]
[an error occurred while processing this directive]

天然气勘探与开发 >

2024 , Vol. 47 >Issue 6: 95 - 104

DOI: https://doi.org/10.12055/gaskk.issn.1673-3177.2024.06.012

油气田开发

低渗含硫气藏开发后期井筒化学解堵工艺——以磨溪雷一1亚段气藏为例

  • 罗诉舟 ,
  • 冯兆阳 ,
  • 郑丽 ,
  • 胡秀银 ,
  • 唐陌泽 ,
  • 梁从军
展开
  • 中国石油西南油气田公司川中油气矿 四川遂宁 629000
罗诉舟,男,1993年生,工程师,硕士;主要从事采油气工艺方面的研究工作。地址：（629000）四川省遂宁市河东新区香林南路178号。E-mail：luosuzhou2018@petrochina.com.cn

修回日期: 2024-06-19

  网络出版日期: 2024-12-13

基金资助

中国石油天然气股份有限公司2021年天然气开发评价先导试验项目“磨溪区块雷一1气藏提高采收率工艺现场试验”

收起

Chemical blockage removal technologies for wellbore in production tail of low-permeability sour gas reservoirs: A case study of T2l11 gas reservoir in Moxi gasfield

  • LUO Suzhou ,
  • FENG Zhaoyang ,
  • ZHENG Li ,
  • HU Xiuyin ,
  • TANG Moze ,
  • LIANG Congjun
Expand
  • Central Sichuan Oil and Gas District, PetroChina Southwest Oil & Gasfield Company, Suining, Sichuan 629000, China

Revised date: 2024-06-19

  Online published: 2024-12-13

Fold

摘要

磨溪雷一1亚段气藏（简称“磨溪雷一1气藏”）属低渗透碳酸盐岩中高含硫气藏,为了解决气藏开发后期地层压力低、井筒堵塞严重导致气井低产甚至停产的难题,进行了井筒化学解堵工艺措施的研究。在分类统计低压气井井筒堵塞现状的基础上,分析堵塞机理,优选解堵剂,并选择磨溪雷一1气藏的典型堵塞气井,开展化学解堵现场试验。针对气井低压特征,优化关键工艺参数,最终形成井口泵注解堵剂、连续油管解堵剂冲洗两套化学解堵工艺措施,适用于堵塞程度不同的气井。研究结果表明：①磨溪雷一1气藏井筒堵塞物主要由烃类、酯类组成的有机物和由FeS、Fe3O4等组成的无机物构成,大部分堵塞物来源于井下工具及管材的腐蚀产物;仅无机解堵剂对堵塞物有溶解分散作用,其中CT4-12B性能最优。②井口泵注解堵剂工艺,适用于井筒内有一定流动通道的中、轻度堵塞井以及堵塞井段较短的重度堵塞井;解堵剂加注量0.5 m3、浸泡时间24 h时,效果最佳。③连续油管解堵剂冲洗工艺,能够有效解除井筒重度堵塞,但井筒造斜点以下施工难度增大;解堵剂加注量1 m3、直井段浸泡时间3 h、斜井段浸泡时间24 h时,效果最佳。两种井筒化学解堵工艺在磨溪雷一1气藏的现场应用试验结果,4口中度堵塞井、8口重度堵塞井共计12口气井实现解堵,日增产气量共计24.1×104 m3,取得较好效果,表明两种井筒化学解堵工艺切实可行,对同类气藏具有一定借鉴意义。

关键词： 低渗; 含硫; 低压; 井筒堵塞; 化学解堵; 解堵剂; 连续油管; 磨溪雷一1气藏

本文引用格式

罗诉舟 , 冯兆阳 , 郑丽 , 胡秀银 , 唐陌泽 , 梁从军 . 低渗含硫气藏开发后期井筒化学解堵工艺——以磨溪雷一1亚段气藏为例[J]. 天然气勘探与开发, 2024 , 47(6) : 95 -104 . DOI: 10.12055/gaskk.issn.1673-3177.2024.06.012

Abstract

The T2l11 gas reservoir in Moxi gasfield is a low-permeability carbonate gas reservoir with moderate-high sulfur content. To solve the problems of low production and shutdown of gas wells resulted from low formation pressure and severe wellbore blockage in the production tail, chemical blockage removal technologies for wellbore were studied. Based on the classification and statistics of wellbore blockage in low-pressure gas wells, the blockage mechanism was analyzed and the optimal blockage remover was selected. A typical blocked well of the T2l11 gas reservoir was chosen to conduct field test of chemical blockage removal. According to its property of low pressure, the key technological parameters were innovatively optimized, and two sets of chemical blockage removal technologies, including wellhead blockage remover pumping and coiled tubing blockage remover flushing, were finally developed for gas wells with different degrees of blockage. The study results show that, (i) the wellbore blockages of T2l11 gas reservoir are mainly composed of organic matters formed by hydrocarbons and esters, as well as inorganic matters formed by FeS and Fe3O4; most of the blockages come from the corrosion products of downhole tools and pipes; only inorganic blockage removers have a dissolving and dispersing effect on blockages, among which CT4-12B has the best performance; (ii) the technology of wellhead blockage remover pumping is suitable for mildly and moderately blocked wells with certain flow channels, as well as severely blocked wells with short sections of blockage; the technology works best when the injected blockage remover is 0.5 m3 and the soak time is 24 h; and (iii) the technology of coiled tubing blockage remover flushing can effectively relieve severe wellbore blockage, however the operation difficulty increases below the kick-off point of wellbore; the technology works best when the injected blockage remover is 1 m3, the soak time of the vertical well section is 3 h and that of the inclined section is 24 h. The field application of the two technologies in the T2l11 gas reservoir shows that a total of 12 wells, including 4 moderately and 8 severely blocked wells, have been unblocked, achieving good results with daily incremental gas of 24.1×104 m3, indicating that the two technologies are practicable and have certain reference significance for similar gas reservoirs.

Key words： Low permeability; Sulfur-bearing; Low pressure; Wellbore blockage; Chemical blockage removal; Blockage remover; Coiled tubing; T2l11 gas reservoir in Moxi gasfield

[an error occurred while processing this directive]

参考文献

[1] 甘笑非, 欧家强, 蔡珺君, 等. 四川盆地磨溪地区雷一1亚段气藏开发中后期高精度数值模拟[J]. 天然气勘探与开发, 2019, 42(3): 101-108.
GAN Xiaofei, OU Jiaqiang, CAI Junjun, et al.High-accuracy numerical simulation on middle to late development stage of T2l11 gas reservoirs, Moxi gasfield, Sichuan Basin[J]. Natural Gas Exploration and Development, 2019, 42(3): 101-108.
[2] 甘笑非, 邓庄, 吴利华, 等. 低渗碳酸盐岩气藏产水动态规律及开发对策研究——以磨溪气田雷一1气藏为例[J]. 石化技术, 2021, 28(2): 126-129.
GAN Xiaofei, DENG Zhuang, WU Lihua, et al.Study on water production dynamic law and development strategy of low permeability carbonate gas reservoir: A case study of Lei11 gas reservoir in Moxi gas field[J]. Petrochemical Industry Technology, 2021, 28(2): 126-129.
[3] 阮基富, 梁峰, 李新玲, 等. 三维地质建模技术在磨溪雷一1气藏中的应用[J]. 石油地质与工程, 2013, 27(4): 51-54.
RUAN Jifu, LIANG Feng, LI Xinling, et al.Application of 3D geological modeling technology in Lei-11 reservoir of Moxi gas field[J]. Petroleum Geology and Engineering, 2013, 27(4): 51-54.
[4] 刘振东, 孙天礼, 朱国, 等. 元坝高含硫气田井筒堵塞物分析[J]. 新疆石油天然气, 2021, 17(3): 1-6.
LIU Zhendong, SUN Tianli, ZHU Guo, et al.Analysis of wellbore blocking substances in Yuanba high-sulfur gas field[J]. Xinjiang Oil & Gas, 2021, 17(3): 1-6.
[5] 张鹏, 杨巧云, 苏建辉. 低渗气藏气井堵塞停产分析及解堵技术应用——以鄂尔多斯盆地长庆气区为例[J]. 天然气与石油, 2023, 41(6): 98-109.
ZHANG Peng, YANG Qiaoyun, SU Jianhui.Causes of gas well plugging and application of plugging removal technology in low permeability gas reservoir: A case study of the Changqing gas field in Ordos Basin[J]. Natural Gas and Oil, 2023, 41(6): 98-109.
[6] 陈林, 吕亚博, 欧家强, 等. 高磨台缘带灯影组气藏气井堵塞机理及治理对策[J]. 西南石油大学学报(自然科学版), 2023, 45(6): 113-124.
CHEN Lin, LÜ Yabo, OU Jiaqiang, et al.Plugging mechanism and treatment measures of Dengying Formation gas reservoir in Gaoshi-Moxi platform margin belt[J]. Journal of Southwest Petroleum University (Science & Technology Edition), 2023, 45(6): 113-124.
[7] 黎洪珍, 刘畅, 梁兵, 等. 气井堵塞原因分析及解堵措施探讨[J]. 天然气勘探与开发, 2010, 33(4): 45-48.
LI Hongzhen, LIU Chang, LIANG Bing, et al.Analysis on causes of gas-well plugging and removing treatment[J]. Natural Gas Exploration and Development, 2010, 33(4): 45-48.
[8] 罗鹏. 合川气田井筒堵塞成因分析及解堵措施[J]. 化学工程与装备, 2021(12): 123-126.
LUO Peng.Analysis on wellbore plugging in Hechuan gas field and its solutions[J]. Chemical Engineering & Equipment, 2021(12): 123-126.
[9] 胡德芬, 陈华勇, 张艳玲, 等. 气井油管堵塞原因及应对措施[J]. 钻采工艺, 2007, 30(6): 127-129.
HU Defen, CHEN Huayong, ZHANG Yanling et al. Causes and countermeasures of tubing plugging in gas wells[J]. Drilling & Production Technology, 2007, 30(6): 127-129.
[10] 沈长寿, 唐永帆, 罗迎冰. 磨溪气田雷一1气藏油管堵塞物清除工艺技术研究[J]. 石油与天然气化工, 2001, 30(6): 310-312.
SHEN Changshou, TANG Yongfan, LUO Yingbing.Study on the chemical cleaning technology in Lei11 reservoir in Moxi gas field[J]. Chemical Engineering of Oil & Gas, 2001, 30(6): 310-312.
[11] 张华利, 山江洪, 沈小军. 四川磨溪气田雷一1气藏地面集输系统腐蚀监测现状[J]. 全面腐蚀控制, 2014, 28(6): 69-72.
ZHANG Huali, SHAN Jianghong, SHEN Xiaojun.Corrosion monitoring status of surface gathering system in Sichuan Moxi gas field[J]. Total Corrosion Control, 2014, 28(6): 69-72.
[12] 孙娜娜, 许晓伟, 李耀, 等. 长庆气田天然气井井筒堵塞与解堵研究现状[J]. 新型工业化, 2020, 10(7): 140-143.
SUN Nana, XU Xiaowei, LI Yao, et al.Research status in quo of wellbore plugging and plugging removal of gas wells in Changqing gas field[J]. The Journal of New Industrialization, 2020, 10(7): 140-143.
[13] 张耀刚, 吴新民, 梁铭, 等. 气井井筒有机解堵工艺技术的应用[J]. 天然气工业, 2009, 29(2): 95-97.
ZHANG Yaogang, WU Xinmin, LIANG Ming, et al.Application of organic plug removal in gas well bore[J]. Natural Gas Industry, 2009, 29(2): 95-97.
[14] 刘婵, 都特, 高同福, 等. 气井堵塞问题及解堵方法研究进展[J]. 石油工业技术监督, 2023, 39(3): 57-61.
LIU Chan, DU Te, GAO Tongfu, et al.Research progress of gas well plugging problem and plugging relief method[J]. Technology Supervision in Petroleum Industry, 2023, 39(3): 57-61.
[15] 何小川, 欧家强. 磨溪雷一1气藏高效开发主体技术与成效[J]. 西南石油大学学报(自然科学版), 2020, 42(4): 144-154.
HE Xiaochuan, OU Jiaqiang.The agent technologies for efficient development of Moxi T2l11 gas reservoir[J]. Journal of Southwest Petroleum University (Science & Technology Edition), 2020, 42(4): 144-154.
[16] 刘宇龙, 熊青山. 环保型钻井液添加剂的优选及性能评价实验[J]. 当代化工, 2021, 50(4): 892-895.
LIU Yulong, XIONG Qingshan.Selection and performance evaluation experiment of environmentally friendly drilling fluid additives[J]. Contemporary Chemical Industry, 2021, 50(4): 892-895.
[17] 孙海军. 气井井筒解堵效果评价[J]. 中国石油和化工标准与质量, 2012, 33(11): 166-167.
SUN Haijun.Effect evaluation of plugging removal for gas wellbore[J]. China Petroleum and Chemical Standard and Quality, 2012, 33(11): 166-167.
[18] 王红宾. 高含硫气井解堵方式的探讨[J]. 化工管理, 2022(29): 58-60.
WANG Hongbin.Discussion on plugging method of high sulfur gas well[J]. Chemical Enterprise Management, 2022(29): 58-60.
[19] 董正亮, 陈大钧, 侯绪林, 等. 龙岗礁滩气藏气井垢污分析及堵塞机理研究[J]. 天然气与石油, 2014, 32(2): 49-52.
DONG Zhengliang, CHEN Dajun, HOU Xulin, et al.Analysis on gas well dirt in Longgang reef reservoir and study on its blockage mechanism[J]. Natural Gas and Oil, 2014, 32(2): 49-52.
[20] 李小凡. 油气井解堵增产技术研究现状及展望[J]. 石化技术, 2016, 23(11): 75-77.
LI Xiaofan.Research status and prospect of plugging removal and production increasing methods in oil and gas wells[J]. Petrochemical Industry Technology, 2016, 23(11): 75-77.
[21] 李冬宁. 凝析气井筒堵塞机理及化学解堵工艺与应用前景[J]. 辽宁化工, 2022, 51(12): 1778-1783.
LI Dongning.Blockage mechanism of condensate gas wellbore and applicative prospect of chemical treatment technology[J]. Liaoning Chemical Industry, 2022, 51(12): 1778-1783.
[22] 张拢. 连续油管在井下作业中的应用分析[J]. 石化技术, 2023, 30(1): 85-87.
ZHANG Long.Application analysis of coiled tubing technology in downhole operation[J]. Petrochemical Industry Technology, 2023, 30(1): 85-87.
[23] 阮基富, 欧家强, 李新玲, 等. 应用水平井技术高效开发低渗气藏实践——以磨溪气田雷一1气藏为例[J]. 石油地质与工程, 2014, 28(4): 126-128.
RUAN Jifu, OU Jiaqiang, LI Xinling, et al.Efficient development of low permeability gas reservoirs by horizontal well technology: A case study of T2l11 gas reservoir in Moxi gas field[J]. Petroleum Geology and Engineering, 2014, 28(4): 126-128.
[24] 肖高棉, 李颖川, 喻欣. 气藏水平井连续携液理论与实验[J]. 西南石油大学学报(自然科学版), 2010, 32(3): 122-126.
XIAO Gaomian, LI Yingchuan, YU Xin.Theory and experiment research on the liquid continuous removal of horizontal gas well[J]. Journal of Southwest Petroleum University (Science & Technology Edition), 2010, 32(3): 122-126.
[25] 黄斌, 张庭玮, 傅程, 等. 水平气井积液诊断方法及携液模型研究进展[J]. 能源与环保, 2021, 43(8): 95-99.
HUANG Bin, ZHANG Tingwei, FU Cheng, et al.Research progress of liquid loading diagnosis methods and liquid loading model in horizontal gas wells[J]. China Energy and Environmental Protection, 2021, 43(8): 95-99.
[26] 黄霖, 邓悟, 郑清平, 等. 井下节流器在含硫气井中的应用[J]. 天然气勘探与开发, 2020, 43(4): 85-91.
HUANG Lin, DENG Wu, ZHENG Qingping, et al.Application of downhole choke to sour gas wells[J]. Natural Gas Exploration and Development, 2020, 43(4): 85-91.
Options
文章导航

/

〈 〉

[an error occurred while processing this directive]