Bibliographic Details
| Title: |
高磨区块灯影组堵塞物成分分析及 针对性解堵液研究. |
| Alternate Title: |
Analysis of blockage composition of the Dengying Formation gas wells in Gaoshiti-Moxi block and research on targeted blockage removal fluid. |
| Authors: |
江藩1 jiangfan_kai@petrochina.com.cn, 刘友权1, 冯逢2, 张博建1, 付铖1, 唐洪3 |
| Source: |
Chemical Engineering of Oil & Gas / Shi You Yu Tian Ran Qi Hua Gong. Feb2026, Vol. 55 Issue 1, p62-67. 6p. |
| Subject Terms: |
*Gas wells, *Chelating agents, *X-ray diffraction, *Geological formations, *Petroleum industry, *Chemical cleaning, *Inductively coupled plasma atomic emission spectrometry |
| Abstract (English): |
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. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
目的 为解决高磨区块灯影组气井井筒及地面频繁堵塞难题, 开展了堵塞物成分分析和解堵液体系的制备与评价。 方法 采用 X 射线衍射分析仪、等离子体光谱仪等对堵塞物进行成分分析, 根据分析结果, 基于协同作用, 研制了一种以有 机螯合酸、有机胺类和聚醚类为主剂, 辅以缓蚀剂和表面活性剂等的解堵液体系。结果 堵塞物以 FeS、FeS2 和 S 等为主, 含 少量酯类、有机硫醇类等有机成分。该解堵液在 80℃ 时对气井堵塞物溶垢率可达 69 g / L, 对 L360 钢和镍合金 825 钢的平 均腐蚀速率分别为 0.0331 mm/ a 和 0.0021 mm/ a, 对现场密封件溶胀率在 0.9% ~ 1.1% 之间。结论 该解堵液对现场堵塞物溶 解效果较好, 对现场金属件和密封件具有低腐蚀性、低溶胀性的优点, 适用于关井浸泡、开井返排的解堵工艺。在高磨区 块成功应用 51 井次, 根据措施前后油压、日产气量计算出解堵有效率达 84.31%, 保证了高磨区块灯影组气井的平稳生产。 [ABSTRACT FROM AUTHOR] |
| Database: |
Energy & Power Source |
