--> Abstract: Effect of Temperature and Pressure on Interfacial Tension and Contact Angle of Khuff Gas Reservoir, by Taha Okasha and Abduljalil Al-Shiwaish; #90077 (2008)

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Effect of Temperature and Pressure on Interfacial Tension and Contact Angle of Khuff Gas Reservoir

Taha Okasha* and Abduljalil Al-Shiwaish
Saudi Aramco
*[email protected]

Knowledge of reservoir fluid properties is essential during the development phase in order to implement an optimal reservoir management strategy for properly exploiting the reservoirs. Interfacial tensions of reservoir fluids, as well as contact angle, are important parameters for many reservoir engineering studies. Examples are imbibition studies and calculation of fluid saturation in the gas-oil transition zone. Both interfacial tension (IFT) and contact angle of the fluids/rock system affect the distribution of fluids within reservoir rock material. The fluids distribution strongly affects the flow behavior and hydrocarbon recovery. Most of the available contact angle and IFT data for gas/brine systems are for room temperature and atmospheric pressure. Since actual values of reservoir temperature and pressure are frequently used in reservoir simulation models, a need to study IFT and contact angle at reservoir conditions was recognized. This study is an investigation of the influence of temperature and pressure on IFT and contact angle of Khuff gas and condensate fluids. Experimental results of IFT for the Khuff-C gas/brine system and condensate-A, B and C/brine system, over a range of temperatures and pressures, are reported. Also, results of contact angle for various samples of condensate/brine/rock material system are documented. The IFT between the Khuff-C gas and brine decreased with increasing temperature at reservoir pressure. Condensate composition affects IFT values for various condensate samples (from Khuff-A, B, and C). Contact angle values for Khuff-C gas/brine/rock material system decreased with both temperature and pressure.

 

AAPG Search and Discovery Article #90077©2008 GEO 2008 Middle East Conference and Exhibition, Manama, Bahrain