Study on Special Dissolving Agent of Marine Epoxy Resin Plugging Agent in Western Sichuan
-
摘要: 川西气田海相具有超深层高温、含盐膏层、高含硫特性，三开制超深大斜度井在开发过程中，恶性漏失、失返性漏失频繁发生。环氧树脂堵漏剂具有常温可泵性、固结时间温控性、固结抗压强度高、大裂缝封堵效果显著等特点，但其黏度相对较高，易在井筒、管道内出现黏附、黏结，且固结成型后不溶、不熔，溶解、解堵异常困难。针对环氧树脂堵漏剂相关技术问题，通过溶解机理分析、溶解正交分析及溶解剂防腐性能优化，研制形成环氧树脂堵漏剂用溶解剂，该溶解剂在120 ℃、24 h条件下对环氧树脂堵漏剂的溶解率为97.82%，对N80钢片腐蚀速率仅为0.0086 g/(m2·h)，低于轻微腐蚀评价标准（0.022 g/(m2·h)），为解决恶性漏失堵漏作业后快速溶解、解堵、井下管柱安全等技术难题提供了新途径。Abstract: The marine facies of the Chuanxi gas field has characteristics of ultra-deep high temperature, salt gypsum layer, and high sulfur content. The development of the triple well system with ultra-deep and high inclination results in frequent malignant and recurrent losses. Epoxy resin plugging agent has the characteristics of pumpability at room temperature, temperature control of consolidation time, high consolidation compressive strength, and significant sealing effect for large cracks. However, its viscosity is relatively high, and it is prone to adhesion and bonding in the wellbore and pipeline. After consolidation, it is insoluble and non melting, making it extremely difficult to dissolve and unblock. In response to the problems related to epoxy resin plugging agent, dissolution mechanism analysis, dissolution orthogonal analysis, and optimization of the anti-corrosion performance of the dissolution agent are conducted, develop a dissolution agent for epoxy resin plugging agent, which has a dissolution rate of 97.82% for epoxy resin plugging agent under conditions of 120 ℃ and 24 hours. The corrosion rate for N80 steel sheet is only 0.0086 g/(m2·h), which is lower than the evaluation standard for slight corrosion (0.022 g/(m2·h)). This provides a new way to solve technical problems such as rapid dissolution, unblocking, and downhole string safety after malignant leakage plugging operations.
-
Key words:
- Epoxy resin plugging agent /
- Dissolving agent /
- Dissolution and unblocking
-
表 1 环氧树脂堵漏剂初期溶解评价
序号 溶解剂 环氧树脂堵漏剂溶解情况 1 BT-1 不溶解，结构完整，未破坏 2 YSYZ-1 不溶解，结构完整，未破坏 3 YJ-1 不溶解，结构完整，未破坏 4 JQ-1 不溶解，结构完整，未破坏 5 二氯甲烷 部分溶解，溶解速度较慢 注：溶解实验条件：温度120 ℃，溶解时间24 h。 
下载: 导出CSV
表 2 酚类和酸类物质对环氧树脂堵漏剂的溶解性能
溶解介质 溶解率/% 溶解情况 二氯甲烷 21.03 部分溶解，溶解速度较慢 二氯甲烷+3%酚类A 50.78 溶解，溶解速度稍增加 二氯甲烷+3%酚类B 32.09 二氯甲烷+3%酚类C 36.76 二氯甲烷+5%无机酸A 54.86 溶解，溶解速度较慢 二氯甲烷+5%无机酸B 49.03 溶解，溶解速度较慢 二氯甲烷+5%无机酸C 52.31 溶解，溶解速度较慢 二氯甲烷+3%酚类A +
5%无机酸A75.34 溶解，溶解速度较快 二氯甲烷+3%酚类A +
5%无机酸B69.09 溶解，溶解速度较快 二氯甲烷+3%酚类A +
5%无机酸C78.24 溶解，溶解速度较快 二氯甲烷+3%酚类A +
5%无机酸A +
5%无机酸B92.25 溶解，溶解速度快 二氯甲烷+3%酚类A +
5%无机酸A +
5%无机酸C82.01 溶解，溶解速度快 二氯甲烷+3%酚类A +
5%无机酸B +
5%无机酸C84.39 溶解，溶解速度快 注：溶解实验条件：温度为120 ℃，溶解时间为24 h。
下载: 导出CSV
表 3 正交实验结果与分析
实验编号 因素 溶解
率/%A B C D 二氯甲
烷/%酚类A/
%无机酸A/
%无机酸B/
%1 75 3 5 2 80.34 2 75 4 10 4 78.91 3 75 5 15 6 84.27 4 80 3 10 6 90.64 5 80 4 15 2 87.12 6 80 5 5 4 79.98 7 85 3 15 4 95.03 8 85 4 5 6 82.71 9 85 5 10 2 91.85 1水平平均
值K10.8117 0.8867 0.8101 0.8644 2水平平均
值K20.8591 0.8291 0.8713 0.8464 3水平平均
值K30.8986 0.8537 0.8881 0.8587 极差R 0.0869 0.0576 0.0780 0.0180 优方差 A3 B1 C3 D1
下载: 导出CSV
表 4 溶解剂防腐性能测定
测定介质 腐蚀速率/（g/(m2·h)） 钢片腐蚀情况 初期配方 223.2768 表面腐蚀严重 初期配方+2%SX-1 0.0086 表面极轻微腐蚀 注：腐蚀实验条件：120 ℃，24 h下对N80钢片腐蚀。
下载: 导出CSV
-
[1] 李锦峰. 恶性漏失地层堵漏技术研究[J]. 探矿工程(岩土钻掘工程),2019,46(5):19-25.LI Jinfeng. Research on plugging technology of malignant leakage formation[J]. Exploration Engineering (Geotechnical Drilling Engineering) , 2019, 46(5):19-25. [2] 陈军,王先兵,刘松,等. 恶性井漏治理现状及展望[J]. 石油化工应用,2017,36(6):12-16.CHEN Jun, WANG Xianbing,LIU Song, et al. Current situation and prospects of malignant well leakage control[J]. Petrochemical Applications, 2017, 36(6):12-16. [3] 王中华. 复杂漏失地层堵漏技术现状及发展方向[J]. 中外能源,2014,19(1):39-46.WANG Zhonghua. Kurrent situation and development direction of plugging technology in complex loss formation[J]. Sino Foreign Energy, 2014, 19(1):39-46. [4] 杨勇,罗鸣,韩成,等. 国内外大裂缝、溶洞性复杂地层堵漏技术进展[J]. 化学工程与装备,2018(8):282-284.YANG Yong, LUO Ming,HAN Cheng, et al. Progress in plugging technology for large fractures and cavernous complex formations at home and abroad[J]. Chemical Engineering and Equipment, 2018(8):282-284. [5] 李明君,胡家森,唐涛,等. 四川盆地井漏处理技术实践与研究[J]. 技术研究,2016,9:44-50.LI Mingjun, HU Jiasen,TANG Tao, et al. Practice and research on lost circulation treatment technology in Sichuan basin[J]. Technical Research, 2016, 9:44-50. [6] 林英松,蒋金宝,秦涛. 井漏处理技术的研究及发展[J]. 断块油气田,2005,12(3):4-7.LIN Yingsong, JIANG Jinbao, QIN Tao. Research and development of lost circulation treatment technology[J]. Fault Block Oil and Gas Field, 2005, 12(3):4-7. [7] 陈杰,马春柳,刘邦,等. 热固性树脂及其固化剂的研究进展[J]. 塑料科技,2019,47(2):95-102.CHEN Jie, MA Chunliu, LIU Bang, et al. Research progress of thermosetting resins and their curing agents[J]. Plastics Science and Technology, 2019, 47(2):95-102. [8] 王灿,侯士立,齐奔,等. 自胶结堵漏技术研究与应用[J]. 钻井液与完井液,2016,33(5):63-66.WANG Can, HOU Shili, QI Ben,et al. research and application of self cementing plugging technology[J]. Drilling Fluid & Completion Fluid, 2016, 33(5):63-66. [9] 张新民,聂勋勇,王平全,等. 特种凝胶在钻井堵漏中的应用[J]. 钻井液与完井液,2007,24(5):83-84.ZHANG Xinmin, NIE Xunyong, WANG Pingquan, et al. Application of special gel in drilling plugging[J]. Drilling Fluid & Completion Fluid, 2007, 24(5):83-84. [10] 钱志伟,王平全,白杨. 钻井堵漏用特种凝胶的适用性[J]. 钻井液与完井液,2012,29(2):51-54.QIAN Zhiwei, WANG Pingquan, BAI Yang. Applicability of special gel for drilling plugging[J]. Drilling Fluid & Completion Fluid, 2012, 29(2):51-54. [11] 谢全,蒲万芬,刑杨梅,等. 预交联凝胶封堵性实验研究[J]. 特种油气藏,2006,13(4):92-93.XIE Quan, PU Wanfen, XING Yangmei, et al. Experimental study on plugging property of pre crosslinked gel[J]. Special Oil and Gas Reservoir, 2006, 13(4):92-93. [12] 王先兵,陈大钧,蒋宽,等. 新型防漏堵漏剂TFD与油气层保护技术[J]. 钻井液与完井液,2011,28(1):20-23.WANG Xianbing, CHEN Dajun, JIANG Kuan, et al. New leakage prevention and plugging agent TFD and reservoir protection technology[J]. Drilling Fluid & Completion Fluid, 2011, 28(1):20-23. [13] 张庆辉,黄毓祥,孙鹏,等. 一种自胶结新型堵漏剂的室内研究[J]. 石油天然气学报,2009,31(5):329-331.ZHANG Qinghui, HUANG Yuxiang, SUN Peng,et al. Laboratory study on a new self cementing plugging agent[J]. Journal of Oil and Gas Technology, 2009, 31(5):329-331. [14] 李志勇, 杨超, 李岩, 等. 抗高温高强度恶性漏失堵漏凝胶室内研究[J]. 新疆石油科技, 2015, 4(25): 40-45LI Zhiyong, YANG Chao, LI Yan, et al. Laboratory study on high temperature resistant and high-strength malignant leakage plugging gel [J]. Xinjiang Petroleum Technology, 2015, 4 (25): 40-45 [15] 刘雪芬, 李松. 破碎地层漏失损害机理及漏失控制对策[J]. 陇东学院学报, 2016, 27(5): 91-94LIU Xuefen, LI Song. Mechanism and control measures for leakage damage in broken strata [J]. Journal of Longdong University, 2016, 27 (5): 91-94 [16] 王照辉,崔凯潇,蒋官澄. 基于形状记忆环氧树脂聚合物的温敏可膨胀型堵漏剂研制及性能评价[J]. 钻井液与完井液,2020,37(4):412-420. doi: 10.3969/j.issn.1001-5620.2020.04.002WANG Zhaohui, CUI Kaixiao, JIANG Guancheng, et al. Development and evaluation of a temperature-sensitive expandable lost circulation material made from a shape memory epoxy polymer[J]. Drilling Fluid & Completion Fluid, 2020, 37(4):412-420. doi: 10.3969/j.issn.1001-5620.2020.04.002 [17] 于斌,王有伟,马天龙,等. 渗透固结型环氧树脂基油气井常温固泥材料[J]. 钻井液与完井液,2022,39(4):481-487. doi: 10.12358/j.issn.1001-5620.2022.04.013YU Bin, WANG Youwei, MA Tianlong, et al. Penetrating consolidating epoxy-based oil and gas well cementing additives for use at ambient temperature[J]. Drilling Fluid & Completion Fluid, 2022, 39(4):481-487. doi: 10.12358/j.issn.1001-5620.2022.04.013 [18] 凌勇,马如然,吕泽,等. 中低温环氧树脂修井液[J]. 钻井液与完井液,2022,39(5):622-628. doi: 10.12358/j.issn.1001-5620.2022.05.014LING Yong, MA Ruran, LYU Ze, et al. A medium-low temperature epoxy based workover fluid[J]. Drilling Fluid & Completion Fluid, 2022, 39(5):622-628. doi: 10.12358/j.issn.1001-5620.2022.05.014 [19] 王翔宇,刘文明,林志辉 ,等. 伊拉克南部油田Φ244.5 mm套管环空带压补救技术[J]. 钻井液与完井液,2021,38(3):360-364. doi: 10.3969/j.issn.1001-5620.2021.03.017WANG Xiangyu, LIU Wenming, LIN Zhihui, et al. Remedy of sustained casing pressure in Φ244.5 mm casing annulus in south oilfield of Iraq[J]. Drilling Fluid & Completion Fluid, 2021, 38(3):360-364. doi: 10.3969/j.issn.1001-5620.2021.03.017 -
点击查看大图
图(3) / 表(5)
计量
- 文章访问数: 674
- HTML全文浏览量: 222
- PDF下载量: 72
- 被引次数: 0
