Academic Journal of Environment & Earth Science, 2024, 6(1); doi: 10.25236/AJEE.2024.060106.
Yi Shi1, Di Gao1,2,3, Di Chen1
1College of Resources and Environment, Henan Polytechnic University, Jiaozuo, 454003, China
2Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing, 102249, China
3Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization, Jiaozuo, Henan, 454003, China
The pollution of drilling fluid and the blockage of coal powder during the drilling and production of coalbed methane well will cause pollution in the near well area, reduce the permeability of coal seam, and even completely block, resulting in the failure of gas production. Therefore, it is necessary to find scientific and reasonable plugging measures, effectively communicate micro-cracks and cracks, and form gas production channels. According to the blockage types of mud pollution, water seal, water + rock seal and so on, a chemical well washing and plugging removal process is proposed, which can achieve good plugging removal effect.
Chemical well washing; Drilling fluid pollution; Production well
Yi Shi, Di Gao, Di Chen. Gas production channel unplugging technology of production well based on chemical washing. Academic Journal of Environment & Earth Science (2024), Vol. 6, Issue 1: 39-45. https://doi.org/10.25236/AJEE.2024.060106.
[1] Miu Huan, Wang Yanbin, Han Wenlong, et al. Classification and development characteristics of coal reservoir based on drilling fluid pollution [J]. China Mining Industry, 2021, 30(06): 214-220.
[2] Su Peidong, Lu Xinghao, Xu Xueyuan, et al. Research status and prospect of geological environment in the process of oil and gas exploitation[J]. Safety and Environmental Engineering: 1-16.
[3] Cai Laixing, Yang Tian, Tian Jingchun, et al. Development characteristics and growth mechanism of clay minerals in tight sandstone reservoirs [J]. Acta sedimentologica: 1-44.
[4] Hu Qi, Wang Shengwei, Zhang Chen, et al. Influence of coal structure on coalbed methane development in southern Qinnan area [J]. Coal science and technology, 2014, 42(08): 65-8+74.
[5] Sun Hansen, Wang Chengwen. Damage mechanism of cementing slurry to coalbed methane reservoir with fissure fracture development [J]. Natural gas industry, 2018, 38(09): 82-87.
[6] Sun Hansen, Wang Chengwen. Research on damage mechanism of cement slurry to coalbed methane reservoir[C]. Proceedings of the 2018 National Coal-bed Gas Academic Conference, Fuxin, Liaoning Province, China, F, 2018.
[7] Wang Ke, Zhang Hualin. Application of acid plugging process in oilfield [J]. China Petroleum and chemical standards and quality, 2023, 43(05): 181-183.
[8] Ni Xiaoming, Li Quanzhong, Wang Yanbin, et al. Experimental study on chemical reflection enhancement of coal reservoirs with different coal grades by multi-component acids [J]. Journal of Coal science, 2014, 39(S2): 436-440.
[9] Peng Shoujian, Xu Jiang, Tao Yunqi, et al. Experimental analysis of permeability of coal sample to effective stress sensitivity [J]. Journal of Chongqing University, 2009, 32(03): 303-307.