新型排水采气用抗凝析油泡排剂

doi:10.7623/syxb202007008

石油学报 ›› 2020, Vol. 41 ›› Issue (7): 865-874.DOI: 10.7623/syxb202007008

新型排水采气用抗凝析油泡排剂

瞿超超¹, 刘正中², 殷鸿尧¹, 鲁光亮³, 李祖友³, 冯玉军¹

1. 四川大学高分子研究所四川成都 610065;
2. 中国石油化工股份有限公司西南油气分公司四川成都 610016;
3. 中国石油化工股份有限公司西南油气分公司川西采气一厂四川德阳 618000

收稿日期:2019-03-29 修回日期:2019-12-20 出版日期:2020-07-25 发布日期:2020-08-08
通讯作者: 冯玉军,男,1971年3月生,1994年获西南石油学院学士学位,1999年获西南石油学院博士学位,现为四川大学研究员、博士生导师,主要从事软物质材料及油田化学的研究。Email:yjfeng@scu.edu.cn
作者简介:瞿超超,男,1994年11月生,2016年获湖北大学学士学位,2019年获四川大学硕士学位,现为东风本田汽车有限公司涂装工程师,主要从事汽车涂装技术及汽车涂装材料方面的研究。Email:chaochaoqu123@foxmail.com.cn
基金资助:
国家科技重大专项"低压低产井高效泡排剂的研发与应用研究"（2016ZX05048-004-007）和国家自然科学基金面上项目（No.21773163）资助。

A new anti-condensate foaming agent for drainage gas recovery

Qu Chaochao¹, Liu Zhengzhong², Yin Hongyao¹, Lu Guangliang³, Li Zuyou³, Feng Yujun¹

1. Polymer Research Institute, Sichuan University, Sichuan Chengdu 610065, China;
2. Sinopec Southwest Oil and Gas Company, Sichuan Chengdu 610016, China;
3. No.1 Gas Production Plant, Sinopec Southwest Oil and Gas Company, Sichuan Deyang 618000, China

Received:2019-03-29 Revised:2019-12-20 Online:2020-07-25 Published:2020-08-08

摘要/Abstract

摘要：

泡沫排水采气是提高低压低产井天然气产量的重要手段之一，但对于含凝析油气井，由于普通泡沫具有遇油消泡的特点，导致常规泡排剂难以产生足量泡沫，从而使排液效果变差。利用阴离子表面活性剂SDS、两性离子表面活性剂CHSB、氟碳表面活性剂PFBS三者的协同作用研制了耐油泡排剂COT。采用罗氏泡沫仪、高温高压可视化泡沫仪、激光共聚焦显微镜研究了凝析油含量、温度、压力和矿化度对泡沫性能的影响，揭示了耐油机理，并与常规泡排剂XA进行了对比研究。研究结果表明，在常压、80℃下，随着凝析油含量的升高，COT泡沫的最大起泡高度（H_max）和半衰期（t_1/2）逐渐升高，而XA的泡沫性能却逐渐减弱；在高压下，随着温度升高，COT泡沫的H_max不受影响，但t_1/2却逐步下降。当固定温度时，随着压力升高，COT泡沫的H_max和t_1/2均显著提升，且在相同的压力和温度下，COT的泡沫综合性能优于XA；随着矿化度升高，COT泡沫的H_max略微下降，t_1/2却显著上升。通过研究油滴与泡沫液膜之间的相互作用发现，当油滴接触到COT泡沫液膜时，会形成稳定的假乳液膜，阻止油滴继续渗入，从而形成稳定的耐油泡沫。新型泡排剂已在12口气井得到了现场应用，累积增产天然气26.35×10⁴m³。

关键词: 排水采气, 耐油泡沫, 表面活性剂复配, 假乳液膜, 动态泡沫

Abstract:

Foam drainage gas recovery is one of the important means to increase the gas production of low-pressure and low-production wells. However, defoaming occurs when foams encounter oil in condensate-bearing gas wells, so it is difficult for conventional foaming agent to generate sufficient foams, which makes the drainage effect worse. The oil-resistant foaming agent COT was developed using the synergistic effect of the anionic surfactant SDS, the zwitterionic surfactant CHSB, and the fluorocarbon surfactant PFBS. Using a ROSS-Miles foam meter, a high-temperature and high-pressure visual foam meter, and a laser scanning confocal microscope, the effect of condensate content, temperature, pressure, and salinity on foam performance was studied, and the mechanism of oil resistance was revealed. Furhter, a comparative study is performed between COT and the conventional foaming agent XA. The results show that at normal pressure and 80℃, the maximum foaming height (H_max)and half-life time (t_1/2)of COT foam gradually increased with the increasing condensate content, while the foam performance of XA gradually weakened. Under high pressure, as the temperature increased, the H_max of COT foam was not changed, but t_1/2 gradually decreased. When the temperature was fixed, with the increasing of pressure, the H_max and t_1/2 of COT foam increased significantly, and the comprehensive performance of COT foam was superior to XA under the same pressure and temperature. With the increasing of salinity, the H_max of COT foam decreased slightly, but t_1/2 increased significantly. By studying the interaction between the oil droplets and the foam film, it is found that when the oil droplets contact with the COT foam film, a stable pseudoemulsion film is formed preventing the oil droplets from continuing to penetrate, thereby forming stable and oil-resistant foams. The foaming agent developed based on the above-mentioned laboratory research has been applied in 12 gas wells in the field, with the cumulative gas production increased by 26.35×10⁴m³.

Key words: drainage gas recovery, oil resistant foam, complex formulation of surfactants, pseudoemulsion film, dynamic foam

中图分类号:

TE39

瞿超超, 刘正中, 殷鸿尧, 鲁光亮, 李祖友, 冯玉军. 新型排水采气用抗凝析油泡排剂[J]. 石油学报, 2020, 41(7): 865-874.

Qu Chaochao, Liu Zhengzhong, Yin Hongyao, Lu Guangliang, Li Zuyou, Feng Yujun. A new anti-condensate foaming agent for drainage gas recovery[J]. Acta Petrolei Sinica, 2020, 41(7): 865-874.

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新型排水采气用抗凝析油泡排剂

A new anti-condensate foaming agent for drainage gas recovery

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