多孔介质润湿反转为优先气湿及气体润湿性.pdf

大庆石油地质与开发
Dec.,2012
第31卷第6期
Petroleum Geology and Oilfield Development in Daqing
Vul. 3I No 6
DOI:10.3969/J.ISN.1000-3754.2012.06.017
多孔介质润湿反转为优先气湿及气体润湿性
蒋宫澄2罗少杰2魏怡君2黄贤斌2张民1庞美涛'2
(1.中国石油大学石油工程教育部重点实验室,北京102249
中国石油大学油气资源与探测国家重点实验室,北京102249)
摘要:理论和实验证实凝析气癒多孔介质表面润湿性由液湿转变为优先气湿可显著提高气井产量,且气湿程度
对气井产量影响较大。但是目前,气体润湿性缺少定量评价方法、无法给出气湿性定量结论。通过理论分析和
实验研究,分析了润湿反转的本质并实现了多孔介质表面由液湿性转变为优先气湿;然后提出了可表征固体表
面气体润湿能力大小的参数る,应用停滴法建立了采用气湿参数ξ进行气湿性定量评价的方法,确立了气湿性定
量评价指标,并采用毛细管上升实验,进一步验证了停滴法实验结果的正确性。实验结果表明;通过降低固体
表面和固一液界面自由能是实现优先气湿的有效方法,随着 Zonyl8740含量的增加,周体表面自由能降低,其表
面的憎液亲气性增强。
关键词:润湿反转;气湿参数;停滴法;表面自由能;毛细管上升
中图分类号:T"E311
文献标识码:A
文章编号:1000-3754(2012)06-0084-05
INVERTED PREFERENTIAL GAS WET FROM LIQUID ONE AND
IS WETTABILITY IN POROUS MEDIA
JIANG Guancheng, LUO Shaojie, WE Yijun", HUANG Xianbin", ZHANG Min", PANG Jiangtao
(1. MOE Key Laboratory of Petroleum Engineering, hina University of Peroleum, Beijing 102249, China
2. State Key Laboratory of Petroleum Resources and Detection, China University of
Petroleum, Beijing 102249, China
Abstract The theoretical and test prove that the inverted surface wettability from liquid wet to preferential gas one
for the porous media in condensate gas reservoirs can enhance the production of gas wells and moreover the degre
of the gas wet possesses rather serious influence on the production But at present, the gas wettability lacks of the
quanti atie valuating mehod hs the e quan i atie evaluation cannot be drawn for the wettability. Through the
theretical analysis and experimental study, the essence of the inversion is analyzed and furthermore the preferentia
gas wet can be realized; and then the parameter y is presented for characterized the ability of the gas wettability of
the solid su ace; with the he of d ausin methd, the uanti ative evaluatin method for the gas wettability is
established by adopting gas wet ability parameter and moreover the uanti ative evaluating index is determined for
收稿日期;2012-02-20改回日期:2012-08-3(
基金项目:中国国家杰出青年基金“多孔介质油气藏气湿性基础理论研究”(NO.50925414);国家科技重大专项“复杂
结构井优化设计与控制关键”(2011ZX05009-005-03A)。
作者简介:蒋官澄,男,1966年生,教授,博士生导师,主要从事油气层损害与保护、油田化学等方面的教学和科研工
作
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