Schlumberger Technology Corporation

Mohamed Ahmed Abdel Reheem Hamdy

Wael Abdallah

Mohammed Badri

Dominic Joseph Brady

Sharath Chandra Mahavadi

Simon Ivar Andersen

Bastian Sauerer

Methods may include emplacing a downhole tool within a wellbore, sampling a fluid downhole with the downhole tool; analyzing the fluid, and calculating an interfacial tension (IFT), wherein calculating the acid-base IFT contribution comprises measuring a concentration of a surface-active species directly. Apparatuses for measuring an interfacial tension (IFT) in a fluid downhole may be part of a downhole tool and may include a sampling head to sample the fluid; and a downhole fluid analysis module that includes a spectrometer capable of measuring a concentration of a surface-active species in the fluid, and a processor configured to determine the IFT of the fluid downhole based on the measured concentration of the surface-active species.

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Dhahran, Saudi Arabia

Mohamed Ahmed Abdel Reheem Hamdy