Page 73 - Standard Handbook Petroleum Natural Gas Engineering VOLUME2

Basic Principles, Definitions, and Data 61

Table 5-14
Surface and Interfacial Tensions for Several Texas Fields
~
Surface Oil-water
tension, interfacial tension,
dyneslcm d ynedcm
Depth, Gravity,
Field Formation ft "API Oil Water 70°F 100°F 190°F
Breckenridge Marble Falls 3,200 38.2 28.8 67.6 19.0 10.9
South Bend Strawn 2,300 36.1 29.9 61.5 29.1 21.4
Banyon Austin 2,135 37.0 29.3 72.5 24.4 17.4 9.6
South Bend Marble Falls 3,900 25.5 31.8 71.4 24.5 16.9
Banyon Austin 2,255 37.9 28.9 72.1 16.9 13.6 12.9
Salt Flats Edwards 2,700 34.9 30.0 73.0 23.0 16.9 16.7
Driscoli Catahoula 3,929 26.0 32.4 61.4 20.4 16.0 15.5
Wortham Woodbine 2,800 38.3 29.2 63.2 13.6 7.3
Wortham Corsicana 2,200 22.4 33.2 59.6 25.1 16.7 13.2
Mexia Woodbine 3,000 36.4 30.0 66.2 21.4 19.0 17.6
Powell Woodbine 3,000 22.9 30.0 66.2 22.6 15.0
Wortham Woodbine 2,800 22.2 33.3 66.0 25.8 15.6
Mexia Woodbine 3,000 36.6 30.2 66.6 15.0 9.2
Breckenridge Marble Fails 3,200 37.7 28.9 70.1 16.2 8.5 10.0
Breckenridge Marble Falls 3,200 36.6 29.4 74.1 15.5 11.3
South Bend Marble Falls 4,200 38.6 28.9 68; 1 14.8 10.8 10.1
Van Woodbine 2,710 33.9 29.0 61.7 18.1 16.2
Raccoon Bend Cockfield 3,007 34.1 31.6 69.8 24.7 14.6 14.3
Tomball Cockfieid 5,541 41.6 28.5 62.0 14.1 13.6
Van Woodbine 2,710 35.0 28.8 64.1 17.9 15.0 7.8
Saxet Catahoula 4,308 26.2 32.0 65.2 17.2 11.5 10.8
Saxet Catahoula 4,308 27.1 32.3 66.5 20.9 16.5 14.1
Pierce Junction Frio 4,325 29.4 31 .O 62.0 16.9 13.9 8.7
Pierce Junction Frio 4,335 22.2 32.6 64.1 20.7 12.9 2.1
East Texas Woodbine 3,660 36.5 28.2 68.6 19.7 10.9 9.6
East Texas Woodbine 3,660 39.5 27.5 70.2 31.4 17.9 13.9
Goose Creek Pliocene 1,470 14.2 34.1 63.7 24.4 19.5
Goose Creek Pliocene 2,040 21.1 33.6 63.5 18.8 15.3 12.5
Goose Creek Mio-Pliocene 2,560 21.2 33.3 64.2 18.1 12.9 12.5
Talc0 Glen Rose 5,000 23.0 31.9 73.9 20.5 18.8 14.8
Big Lake Ordovician 8,300 42.6 28.5 63.3 18.1 14.8 12.5
Big Lake Permian 3,000 38.0 27.9 66.2 27.3 18.3 15.7
Crane Permian 3,500 31 .l 29.5 68.2 18.6 14.8 7.8
Echo Frye (Pa.) 1,950 38.4 27.8 49.5 34.3 24.6 18.6
...
From Reference 92.

Wettability and Contact Angle
The contact angle (ec), existing between two fluids in contact with a solid and
measured through the more dense phase, is a measure of the relative wetting
or spreading by a fluid on a solid. A contact angle of zero indicates complete
wetting by the more dense phase, an angle of 180" indicates complete wetting
of the less dense phase, and an angle of 90' means that neither fluid pre-
ferentially wets the solid.