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API Spacer Wettability Tests May 30 th – June 10 th, 2013 Mud-Spacer Compatibility Test & Goniometer Contact Angle Test Wettability Test with Stirred Fluid.

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Presentation on theme: "API Spacer Wettability Tests May 30 th – June 10 th, 2013 Mud-Spacer Compatibility Test & Goniometer Contact Angle Test Wettability Test with Stirred Fluid."— Presentation transcript:

1 API Spacer Wettability Tests May 30 th – June 10 th, 2013 Mud-Spacer Compatibility Test & Goniometer Contact Angle Test Wettability Test with Stirred Fluid Loss Apparatus SSST Test & Goniometer Contact Angle Test on Final Mixture SSST Test & Goniometer Contact Angle Test on Final Mixture (rerun)

2 Spacer-Mud Compatibility Test & Goniometer Contact Angle Test Beaker Size (ml)150 Mud:Spacer Volume Percent Mud:Spacer Grams Rheologies at Temperature ( 190 degF) Visual Observations PvYp Separat ionSettling Floccul ation Baseline Average Treated Slides yes/no YesNo YesNo YesNo * YesNo YesNo * Goniometer won’t take measurement, contact angle was estimated to be 74 degree

3 Stirred Fluid Loss Apparatus Measure contact angle baseline on goniometer – Metal slide average contact angle = 73.02° – Glass slide average contact angle = 38.56° Mud coated on both slide (Atmosphere Temp) Spacer conditioned at 190° in stirred fluid loss apparatus Glass slide became completely water wet Metal slide had a average contact angle of 83.25°

4 SSST – First Run Spacer Added (ml) Spacer (%)ConductivityBaseline

5 Goniometer - Final SSST Mixture Treated No Coating100% Mud Coated for 10 sec RinseWipeRinseWipe Avg. Base Avg. C.Angle Avg. Base Avg. C.Angle Avg. Base Avg. C.Angle Avg. Base Avg. C.Angle Glass Metal Wiped slides show lower contact angle (water-wet) compared with rinsed ones. Glass slides coated with mud before dipping into SSST final mixture give a lower contact angle. To reinforce this observation, same test was rerun as shown in next page. Metal slides didn’t show similar results as glass ones. Metal slide became more oil-wet after treated with mud.

6 SSST – Rerun Spacer Added (ml) Spacer (%)ConductivityBaseline

7 Goniometer - Final SSST Mixture Treated (Rerun) No Coating 100% Mud Coated for 10 sec 100% Mud Coated for 10 min RinseWipeRinseWipeRinseWipe Avg. Base Avg. C.Angle Avg. Base Avg. C.Angle Avg. Base Avg. C.Angle Avg. Base Avg. C.Angle Avg. Base Avg. C.Angle Avg. Base Avg. C.Angle Glass Metal New glass slides yield to a baseline around 30°, used glass slides cleaned by IPA and DI water yield to a base line around 43° Wiped slides show lower contact angle (water-wet) compared with rinsed ones. Glass slides coated with mud before dipping into SSST final mixture give a slightly lower contact angle, which repeats the result in previous test. However, glass slide coated with mud for 10 minutes gave a higher contact angle (oil-wet). Time duration of treatment may have a big effect on wettability result. Tests can be run with metal slides are limited by the quantity of metal slides available in lab.


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