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中南大学学报(自然科学版)

Journal of Central South University

第49卷    第10期    总第290期    2018年10月

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文章编号:1672-7207(2018)10-2430-08
煤层气井用高效双子型起泡剂ULT-1的研制
李志勇1,宋吻吻1,王德桂2,吴江3,张丰琰1,杨宗凡1

(1. 中国石油大学(北京) 油气资源与探测国家重点实验室,北京,102249;
2. 中联煤层气有限责任公司 研究中心,北京,100015;
3. 中海石油(中国)有限公司 湛江分公司,广东 湛江,524057
)

摘 要: 分析起泡剂的分子结构与起泡量、泡沫稳定性的关系,设计新型起泡剂ULT-1的分子结构,室内合成该起泡剂。红外光谱和质谱对起泡剂的结构表征与分子结构设计一致。对起泡剂ULT-1进行性能评价。研究结果表明:质量分数为0.2%的起泡剂ULT-1水溶液的表面张力达到20.40 mN/m,较蒸馏水降低了71.82%,发泡体积达 501 mL,半衰期长达1 440 s,与质量分数0.5%的常规起泡剂相比,泡沫半衰期提高3倍以上。起泡剂ULT-1的抗盐及抗温性能较好,煤样润湿性恢复值高达93.70%,起泡剂ULT-1容易在煤岩表面脱附,有利于储层保护。

 

关键字: 煤层气;起泡剂;结构表征;表面张力;起泡性能

Development of high-efficiency gemini foaming agent ULT-1 for coalbed methane well
LI Zhiyong1, SONG Wenwen1, WANG Degui2, WU Jiang3, ZHANG Fengyan1, YANG Zongfan1

1. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum(Beijing), Beijing 102249, China;
2. Research Centre, China United Coalbed Methane Corporation, Ltd., Beijing 100015, China;
3. Zhanjiang Branch of CNOOC Ltd., Zhanjiang 524057, China

Abstract:The relationship between molecular structure of foaming agent and foaming amount and foam stability was analyzed. The molecular structure of ULT-1 was designed and the foaming agent was synthesized indoors. The structure and characterization of the foaming agent by infrared spectroscopy and mass spectrometry were consistent with the molecular structure design. The performance of ULT-1 foaming agent was evaluated. The results show that the surface tension of foaming agent ULT-1 aqueous solution with mass fraction of 0.2% is 20.40 mN/m, which is 71.82% lower than that of distilled water. The volume of foaming reaches 501 mL and the half-life is up to 1 440 s. The foam half-life is more than 3 times higher than the conventional foaming agent with mass fraction of 0.5%. The ULT-1 foaming agent has better salt resistance and temperature resistance, and the recovery value of coal sample wettability is as high as 93.70%. The foaming agent ULT-1 is easy to desorb on the surface of coal and rock, which is good for reservoir protection.

 

Key words: coalbed methane; foaming agent; structural characterization; surface tension; foaming property

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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