Analysis of Components of Gas Well Blocking Substances and Study on a Composite Block Removing System
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摘要: 蜀南气矿高石梯区块气井堵塞严重，导致区块天然气产量严重下降，为了恢复天然气产量，需要对发生堵塞的气井设计解堵工作液进行解堵作业。通过红外光谱仪、X射线衍射仪等分析测试方法对现场取回的堵塞物进行分析，明确了堵塞物含有的有机和无机组分及含量；依据解堵原理，利用二甲苯、15%HCl和异丙醇构建复合解堵体系，优化了原料配比，并考察了不同作用时间、固液比以及温度对复合解堵体系的解堵效果的影响。在m（二甲苯）∶m（15%HCl）∶m（异丙醇）=17.32∶25.99∶56.69的条件下构建的复合解堵体系的解堵效果最好；在固液比为1∶15的条件下解堵效率最优为90.25%。该复合解堵体系可有效对高石梯区块的堵塞物进行溶蚀，且溶蚀后剩余物粒径较小，有利于从堵塞位置排出。现场利用该复合解堵体系施工后，堵塞的气井的产量恢复。Abstract: Gas wells drilled in the Gaoshiti block of the Southern Sichuan Gas District have encountered serious formation blocking problem, resulting in significant decline in the gas production. To restore the gas production, blocking removing needs to be performed with blocking removing fluids in wells where reservoir formations are blocked. By analyzing the blockages taken from the wells with IR and XRD methods, the organic and inorganic components and their contents in the blockages were determined. Based on the blocking removing principles, a composite blocking removing system was formulated with xylene, 15% HCl and isopropnaol, and was then optimized for the material ratio. The effects of action time, solid/liquid ratio as well as temperature on the blocking removing performance of the blocking removing system were investigated. It was found that the blocking removing system formulated with m (xylene)∶m (15% HCl)∶m (isopropnaol) = 17.32∶25.99∶56.69 has the optimum blocking removing performance. At solid/liquid ratio of 1∶15 the efficiency of blocking removing is 90.25%, which is the highest efficiency. This composite blocking removing system can effectively dissolve the blockages found in the Gaoshiti block, and the residues after dissolution have smaller particle sizes, beneficial to discharging from where the formations are blocked. Wells operated with this blocking removing system have their gas production restored.
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Key words:
- Gas well /
- Blocking /
- Blocking removing /
- Composite blocking removing system
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表 1 堵塞物的全岩定量分析结果
矿物 白云石 石英 重晶石 石膏 纤铁矿 针铁矿 磁黄
铁矿菱铁矿 黄铁矿 含量/
%3.3 0.6 0.8 1.9 11.2 7.7 55.2 4.9 14.4 
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表 3 不同复合解堵体系配方及对堵塞物的溶蚀率
复合解堵
体系复合解堵体系配方 溶蚀率/
%二甲苯/% 15%HCl/% 异丙醇/% FJD-91 41.42 4.60 53.98 23.17 FJD-82 34.39 8.60 57.01 41.82 FJD-73 26.80 11.49 61.72 52.54 FJD-64 23.83 15.89 60.29 61.48 FJD-55 20.96 20.96 58.07 69.37 FJD-46 17.32 25.99 56.69 76.35 FJD-37 13.41 31.29 55.30 72.18 FJD-28 9.32 37.28 53.40 56.01 FJD-19 4.83 43.44 51.74 42.13
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表 4 不同作用时间下复合解堵体系FJD-46的溶蚀率
作用时间/h 0.5 1 2 4 6 8 10 12 14 16 溶蚀率/% 4.31 7.93 13.34 28.91 46.29 60.08 69.71 76.35 76.25 76.87
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表 7 不同缓蚀剂在复合解堵体系的缓蚀性能
缓蚀剂类型 加量/% 腐蚀速率/（g·(m2·h)−1） 无 - 86.92 季铵盐型缓蚀剂JHS 0.10 6.64 0.15 3.59 0.20 3.18 醛酮胺型缓蚀剂QHS 0.10 11.56 0.15 9.63 0.20 6.54 咪唑啉型缓蚀剂MHS 0.10 8.87 0.15 6.51 0.20 4.85
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[1] 文绍牧, 何润民, 敬兴胜, 等. 西南油气田天然气与新能源深度融合的路径探索[J]. 石油与天然气化工, 2024, 53(5): 1-6.WEN Shaomu, HE Runmin, JING Xingsheng, et al. Exploration of the path for deep integration of natural gas and new energy in petro China southwest oil&gasfield company[J]. Chemical Engineering of Oil and Gas, 2024, 53(5): 1-6. [2] 何小川, 李孜孜, 陈渝静, 等. 川渝地区天然气化学工业产业链价值提升路径与策略[J]. 天然气工业, 2024, 44(12): 27-33. doi: 10.3787/j.issn.1000-0976.2024.12.003HE Xiaochuan, LI Zizi, CHEN Yujing, et al. Path and strategy to enhance the value of natural gas chemical industry chain in Sichuan-Chongqing area[J]. Natural Gas Industry, 2024, 44(12): 27-33. doi: 10.3787/j.issn.1000-0976.2024.12.003 [3] 刘毅, 冯朋鑫, 常永峰, 等. 长庆气区关停气井挖潜措施技术与展望[J]. 钻采工艺, 2024, 47(3): 82-89.LIU Yi, FENG Pengxin, CHANG Yongfeng, et al. Potential tapping technology and prospect for shut-down gas wells in Changqing gas area[J]. Drilling & Production Technology, 2024, 47(3): 82-89. [4] 何立成, 蓝强, 黄维安, 等. 有机缓释微乳酸高效解堵剂的制备及性能研究[J]. 钻井液与完井液, 2022, 39(2): 259-264.HE Licheng, LAN Qiang, HUANG Weian, et al. Preparation and properties of slow-release organic acid micro-emulsion with high efficient plugging removal[J]. Drilling Fluid & Completion Fluid, 2022, 39(2): 259-264. [5] 李善建, 杜进繁, 贺建英, 等. 天然气井井筒解堵工作液的研究进展[J]. 应用化工, 2024, 53(1): 238-241.LI Shanjian, DU Jinfan, HE Jianying, et al. Research progress of natural gas well wellbore declogging working fluid[J]. Applied Chemical Industry, 2024, 53(1): 238-241. [6] ZHANG P. Review of synthesis and evaluation of inhibitor nanomaterials for oilfield mineral scale control[J]. Frontiers in Chemistry, 2020, 8: 576055. doi: 10.3389/fchem.2020.576055 [7] YANG J, FENG Y Y, ZHANG B J, et al. A blockage removal technology for natural gas hydrates in the wellbore of an ultra-high pressure sour gas well[J]. Natural Gas Industry B, 2021, 8(2): 188-194. doi: 10.1016/j.ngib.2020.09.017 [8] 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. [9] YANG Q Y, ZHANG P, LI D X, et al. Blockage types of gas well and technical countermeasures for de-plugging in low-permeability tight gas reservoirs[C]//Proceedings of the International Field Exploration and Development Conference 2023. Singapore: Springer, 2024: 95-109. [10] 杨淑珍, 姚二冬, 陈庆, 等. 迪那2气田井筒高温解堵液体系[J]. 钻井液与完井液, 2018, 35(1): 124-128.YANG Shuzhen, YAO Erdong, CHEN Qing, et al. Study on high temperature block removing fluids used on dina-2 Ges field[J]. Drilling Fluid & Completion Fluid, 2018, 35(1): 124-128. [11] ZHU T Y, YANG H B, JIANG H H, et al. Study on an emulsion-type blockage removal agent for heavy oil recovery enhanced by polymer[J]. Journal of Industrial and Engineering Chemistry, 2020, 89: 273-279. doi: 10.1016/j.jiec.2020.05.023 [12] SHI B W, WANG Z H, ZHANG Z W, et al. A state of the art review on the wellbore blockage of condensate gas wells: towards understanding the blockage type, mechanism, and treatment[J]. Lithosphere, 2022, 2022(Special 12): 8076631. [13] HOU Y, LI H, LIU R, et al. Application of reservoir blockage-relieving in low permeability carbonate of Jingbian gas-field[J]. Journal of Physics: Conference Series. IOP Publishing, 2024, 2834(1): 012091. doi: 10.1088/1742-6596/2834/1/012091 -
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