石油与天然气化工2026，Vol.55Issue(1)：62-67,6.DOI:10.3969/j.issn.1007-3426.2026.01.009
高磨区块灯影组堵塞物成分分析及针对性解堵液研究
Analysis of blockage composition of the Dengying Formation gas wells in Gaoshiti-Moxi block and research on targeted blockage removal fluid
摘要
Abstract
Objective To solve the frequent wellbore and surface blockage of the Dengying Formation gas wells in the Gaoshiti-Moxi(Gao-Mo)block.Method The compositions of the blockage were analyzed using the X-ray diffraction analyzer and the plasma spectrometer.Based on the analysis results and the synergistic effect,a targeted blockage removal fluid was developed,which mainly consists of organic acid chelating agents,organic amines,polyethers,and is supplemented with corrosion inhibitors,surfactants,and other additives.Result The blockage was mainly composed of FeS,FeS2 and S,with a small amount of organic components such as esters,organic acids.The solubilization rate of the fluid for the blockage at 80℃could reach 69 g/L.The average corrosion rates of L360 and nickel alloy 825 steel plates were 0.033 1 mm/a and 0.002 1 mm/a,respectively.The swelling rate of the sealing materials was between 0.9%and 1.1%.Conclusion The blockage removal fluid has a good dissolution effect on the on-site blockage,and has lower corrosivity and lower swelling to on-site metal and sealing materials.It is suitable for the unblocking process of well shut-in soaking and well opening drainage.It has been successfully applied in 51 wells in the Gao-Mo block,and the unblocking efficiency was calculated to be 84.31%based on the oil pressure and daily gas production before and after the measures,ensuring the stable production of the Dengying Formation gas wells in the Gao-Mo block.关键词
堵塞物/解堵/溶垢性能/高磨区块/灯影组Key words
blockage component/blockage removal/scale solubility/Gao-Mo block/Dengying formation引用本文复制引用
江藩,刘友权,冯逢,张博建,付铖,唐洪..高磨区块灯影组堵塞物成分分析及针对性解堵液研究[J].石油与天然气化工,2026,55(1):62-67,6.基金项目
中国石油西南油气田公司科技项目"川中古隆起深层碳酸盐岩气藏生产井腐蚀与结垢防治技术研究"(20230303-08) （20230303-08）
