Study and application of acid pickling technology in well bore for coal-bed methane wells

被引：0
|
作者：
Pang B. [1 ]
Xiong X.-Y. [1 ]
Lin W. [1 ]
Wang W. [1 ]
Ji L. [1 ]
Li J.-X. [1 ]
机构：
[1] Hancheng Branch, Petrochina Coalbed Methane Company Limited, Weinan
来源：
| 1600年 / China Coal Society卷 / 41期
关键词：
Acid formula; Acid pickling; Coal slime; Coal-bed methane; Technology study; Well bore;
D O I：
10.13225/j.cnki.jccs.2015.1427
中图分类号：
学科分类号：
摘要：
A large amount of coal slime could be produced during CBM wells drainage process, could cause pump leakage, stuck pump or sieve tube blockage, and lead to drainage work interruption, coal seam permeability damage and gas production decrease. In order to deal with this severe problem, the acid pickling technology has been developed based on slime component analysis, acid formula study, and process design to solve the problems like stuck and blockage down in the well bore. To apply this technology, acid fluid is injected into casing tubing annulus and is then discharged through oil tube. By doing so, slime jam could be removed, the duration of production could be maximized, and workover job could be avoided remarkably without interrupting drainage process. Field application shows a good application potential with a 90.5% efficiency, which illustrates a good prospect of application. © 2016, Editorial Office of Journal of China Coal Society. All right reserved.
引用
收藏
页码：159 / 163
页数：4
相关论文
共 16 条
  • [1] Li A., Jiang H., Chen C., Hydraulic fracturing practice and coal-bed fracture model selecting for coal-bed gas wells in China, Natural Gas Industry, 24, 5, pp. 91-94, (2004)
  • [2] Shan X., Zhang S., Li A., Et al., Analyzing the fracture extended law of hydraulic fracturing in coal-bed gas wells, Natural Gas Industry, 25, 1, pp. 130-132, (2005)
  • [3] Wang G., Wu J., Xiong D., Et al., Fine stable controlling technologies of water drainage and gas production in the Panhe CBM Gas Field, southern Qinshui Basin, Natural Gas Industry, 31, 5, pp. 31-34, (2011)
  • [4] Ye J., Zhang J., Wang Z., Production performance and its controlling factors in the Panhe CMB Gas field, southern Qinshui Basin, Natural Gas Industry, 31, 5, pp. 31-34, (2011)
  • [5] Yue Q., Zou L., Jiang G., Et al., Lab investigation on damage mechanism of coal reservoir for pinnate horizontal well based on coalbed methane, Journal of China Coal Society, 37, 1, pp. 91-95, (2012)
  • [6] Yao Z., Cao D., Xiong X., Et al., Forecast of coal fines-related downhole failures based on monitoring dynamometer card, Journal of China Coal Society, 40, 7, pp. 1595-1600, (2015)
  • [7] Zhao W., Li R., Wu X., Et al., Preliminary indoor experiments on enhancing permeability rate of coal reservoir by using acidification technology, China Coalbed Methane, 9, 1, pp. 10-13, (2012)
  • [8] Li R., Wang K., Wang Y., Indoor study on acidification for enhancing the permeability of coal, Journal of China Coal Society, 39, 5, pp. 913-917, (2014)
  • [9] Feng S., Hou H., Damages to CBM reservoir and its protection during CBM drilling, China Coalbed Methane, 5, 3, pp. 17-20, (2008)
  • [10] Wang X., Zhao Y., Wu T., Analysis of typical production mechanism and characteristics of coalbed methane wells for high rank coal in south Qinshui Basin, Coal Geology & Exploration, 37, 5, pp. 19-22, (2009)
12