武杰, 田永东. 高聚能电脉冲技术在沁水盆地煤层气井的应用[J]. 煤田地质与勘探, 2018, 46(5): 206-211,218. DOI: 10.3969/j.issn.1001-1986.2018.05.032
引用本文: 武杰, 田永东. 高聚能电脉冲技术在沁水盆地煤层气井的应用[J]. 煤田地质与勘探, 2018, 46(5): 206-211,218. DOI: 10.3969/j.issn.1001-1986.2018.05.032
WU Jie, TIAN Yongdong. Application of high energy electric pulse technology in coalbed methane wells in Qinshui basin[J]. COAL GEOLOGY & EXPLORATION, 2018, 46(5): 206-211,218. DOI: 10.3969/j.issn.1001-1986.2018.05.032
Citation: WU Jie, TIAN Yongdong. Application of high energy electric pulse technology in coalbed methane wells in Qinshui basin[J]. COAL GEOLOGY & EXPLORATION, 2018, 46(5): 206-211,218. DOI: 10.3969/j.issn.1001-1986.2018.05.032

高聚能电脉冲技术在沁水盆地煤层气井的应用

Application of high energy electric pulse technology in coalbed methane wells in Qinshui basin

  • 摘要: 为了研究高聚能电脉冲技术在煤层气井的应用效果,对沁水盆地4口典型煤层气井进行了电脉冲技术现场试验。结果表明,试验初期4口煤层气井的产气量和产水量较试验前明显增加,说明电脉冲技术应用在煤储层可以解堵、提升液体流动和促进气体解吸;4口井的产气量和产水量基本都是在运行10~20d后出现明显衰减,说明电脉冲技术在本区煤储层的有效作用半径较短;2口井运行100d后的产气量和产水量仍然要高于试验前的产气量和产水量,说明电脉冲技术在煤层气井近井地带解堵、提升产量有适应性选择和较好的应用前景;电脉冲增产技术在煤岩强度较低、煤体结构较破碎的煤层中的应用存在局限性,最好在煤体结构较完整的煤层中应用,并且针对不同井况优化电脉冲技术参数,从而提高电脉冲增产技术的应用效果;该技术仅能作为煤储层的二次改造措施,不能取代常规压裂技术作为煤层的一次改造措施。

     

    Abstract: In order to study the application effect of high energy electric pulse technology in coalbed methane wells, four CBM wells in Qinshui basin were tested by electric pulse technology. The results show that the gas production and water production of four coalbed methane wells in the early stage of the test increased more obviously than that before the test, which shows that the application of electric pulse technology in coal reservoir can really remove plugging, improve liquid flow and promote gas desorption. The gas production and water production of the four wells were basically attenuated after 10-20 days of the test, which indicates that the effective radius of the electric pulse technology is shorter in the coal reservoir in this area. The gas production and water production of two wells after operation for 100 days were still higher than that before test. It shows that the electric pulse technology has the adaptability choice and the good application prospect in the near wellbore plugging removal and production promotion of coalbed methane wells. There are limitations in the application of electric pulse stimulation technology in coal seams with low coal mass strength and fractured coal structure. It is better to apply electric pulse stimulation technology in coal seams with complete structure, and optimize the technical parameters for different well conditions, so as to improve the application effect of electric pulse stimulation technology. This technology can only be used as the secondary reformation measure of coal reservoir, can not replace the conventional fracturing technology as the primary reformation measure of coal seam.

     

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