Variation of gas-oil-solid contact angle with interfacial tension

Z. Al-Siyabi, A. Danesh, B. Tohidi, A. C. Todd

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


Contact angle has a major influence on the distribution of multi-phase fluids within petroleum reservoir rocks. However, there is little information on the variation of gas-oil-rock contact angle with pertinent parameters in the literature. In this study, it has been observed that the contact angle is almost constant at high gas-oil interfacial tension (IFT) above a threshold value and declines at a variable rate, depending on the volatility of the mixture, approaching zero at the critical point. The generated data were used to develop a generalized correlation between the contact angle and IFT and other measurable parameters of the system.

Original languageEnglish
Pages (from-to)37-40
Number of pages4
JournalPetroleum Geoscience
Issue number1
Publication statusPublished - Feb 1999


  • Adhesion
  • Binary mixture
  • Convergence pressure
  • Interfacial tension


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