Measurement and Analysis of Oil-water Contact Angle on Several Common Minerals

doi:10.19657/j.geoscience.1000-8527.2018.04.20

Abstract

Abstract:

In this paper, the contact angles of oil droplets on mineral surface were determined using contact-angle measuring instrument. The contact angles of different oil types in different mineralizing water and different component oil and mixed-component oil were measured. We proposed a reasonable measurement method to maximize the measurement result accuracy. After measuring the size of the wetting angle, it is found that the lipophilicity of the minerals in the water vary from strong to weak: mica>pyrite>calcite>dolomite>quartz.The type of mineral, oil composition type, water mineralization degree all impose significant influence on the contact angle, and the wetting of oil and water on different mineral surfaces is different. With increasing octadecane content of the oil droplets, the contact angle of the oil droplets on mica surface decreases and the wettability increases. The surface wettability is slightly different on the surface of other minerals. With increasing water mineralization, the contact angle of oil droplets on mica surface increases and the wettability decreases gradually, and the wettability on other mineral surface is also slightly different.

Key words: oil-water-mineral, oil component, contact angle, wettability

CLC Number:

TE311

WU Chunzheng, XUE Haitao, LU Shuangfang, TIAN Shansi. Measurement and Analysis of Oil-water Contact Angle on Several Common Minerals[J]. Geoscience, 2018, 32(04): 842-849.

Figures/Tables 9

Fig.1 Schematic diagram of the “hanging drop” method

Fig.2 Morphology of droplets with different diameters

Fig.3 Oil droplets of different sizes and contact angles

Fig.4 Time variation chart of contact angle

Table 1 Contact angle of oil droplets on mineral surface in distilled water

矿物	N,N- 二甲基十二胺	1,3- 二甲基环己烷	正戊烷 C₅	正己烷 C₆	正辛烷 C₈	正壬烷 C₁₉	正十三烷 C₁₃
云母	18.82	116.27	117.43	131.21	135.44	121.80	131.53
黄铁矿	95.97	110.75	130.80	134.11	122.54	136.05	142.03
方解石	128.06	127.26	133.79	129.79	141.96	133.68	149.46
白云石	126.68	134.90	141.08	136.63	134.89	148.23	150.90
石英	41.15	149.48	146.41	147.05	106.12	154.18	154.19

Fig.5 Wettability of different minerals in distilled water

Fig.6 Contact angles of alkanes on mineral surface in distilled water

Fig.7 Wetting angle of mixed oil droplets on mineral surface

Fig.8 Contact angle of oil droplets in calcium chloride solution

References 15

[1]	全国科学技术名词审定委员会. 材料科学技术名词[M]. 北京: 科学出版社, 2010:7-50.
[2]	傅献彩, 沈文霞, 姚天扬, 等. 物理化学[M]. 北京: 高等教育出版社, 2006:20-60.
[3]	李哲, 姚雨龙, 肖伟丽. 矿物颗粒表面润湿程度的表征及应用[J]. 黑龙江科技学院学报, 2011, 21(4):225-229.
[4]	张曙光, 刘景龙, 邓颖. 储层岩石表面接触角的不确定性研究[J]. 矿物岩石, 2011, 21(1):48-52.
[5]	罗晓斌, 朱定一, 石丽敏. 基于接触角法计算固体表面张力的研究进展[J]. 科学技术与工程, 2007, 19(7):4997-5004.
[6]	丁晓峰, 管蓉, 陈沛智. 接触角测量技术最新进展[J]. 理化检验(物理分册), 2008, 44(2):84-90.
[7]	ZHOU X B, DE HOSSON J T M Influence of surface roughness on the wetting angle[J]. Journal of Materials Research, 1995, 10(8):1984-1992. DOI URL
[8]	杜文琴, 戊莹柱. 接触角测量的量高法和量角法的比较[J]. 纺织学报, 2007, 28(7):29-34.
[9]	秦之铮. 利用接触角计测角评价油层润湿性[J]. 石油勘探与开发, 1987(3): 80-81.
[10]	籍延坤, 郝久清, 崔玉广. 固体与液体接触角的测定[J]. 抚顺石油学院学报, 2002, 22(3):84-87.
[11]	陆现彩, 侯庆峰, 尹林, 等. 几种常见矿物的接触角测定及其讨论[J]. 岩石矿物学杂志, 2003, 22(4):397-401.
[12]	KAISER N, CRÖLL A, SZOFRAN F R, et al. Wetting angle and surface tension of germanium melts on different substrate materials[J]. Journal of Crystal Growth, 2001, 231(4):448-457. DOI URL
[13]	胡西嘉, 郑建中, 王静. 碳酸钙矿物表面润湿性的控制机理[J]. 江苏地质, 2007, 31(4):329-334.
[14]	印万忠, 孙传尧. 硅酸盐矿物浮选原理研究现状[J]. 矿产保护与利用, 2001, 31(3):17-22.
[15]	陈勇, 葛云锦, 周振柱, 等. 矿物润湿性对储层烃类包裹体形成制约的实验研究[J]. 地质学报, 2011, 85(4):569-575.