Carbonate rocks wettability changes induced by microbial solution

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Contact angles are used to measure the wetting behavior of two immiscible fluids on a solid surface. Fluids are considered wettings if their contact angles with surface are less than 90o, and they are considered non-wetting, if their contact angles are greater than 90o. Because of its influence on other petrophysical properties of reservoir rocks, such as relative permeability, capillary pressure, and the residual oil saturation after a flood, wettability and its direct measure, the contact angle, play a significant role in affecting the recovery from both primary and improved recovery processes. In this work, contact angle alteration occurring in microbial enhanced oil recovery processes (MEOR) are quantififed and described, along with a study of the factors that would enhance such contact angle alteration. An experimental method for the measurement of contact angles has been developed in which the contact angle is measured as a function of time. Measurements of contact angle and interfacial tension for four different types of UAE crude oil and four different mineralogical rock composition over a range of microbial concentration, salinity, and temperature are reported. Results showed that contact angles for the studied systems increased with temperature, crude oil sulfur concentration and microbial concentration up to a certain concentration, beyond which the bacteria concentration exhibited no effect on the contact angle. Crude oils containing low asphaltene concentration produced a stable contact angle and oils containing high asphaltene concentration produced surfaces with unstable wettability. The mineralogical composition of limestone rocks had no effect on the contact angle of microbial-oil system.

Original languageEnglish
Title of host publicationSociety of Petroleum Engineers - SPE Asia Pacific Oil and Gas Conference and Exhibition 2003, APOGCE 2003
PublisherSociety of Petroleum Engineers
ISBN (Print)9781555639617
Publication statusPublished - 2018
EventSPE Asia Pacific Oil and Gas Conference and Exhibition 2003, APOGCE 2003 - Jakarta, Indonesia
Duration: Sep 9 2003Sep 11 2003

Publication series

NameSociety of Petroleum Engineers - SPE Asia Pacific Oil and Gas Conference and Exhibition 2003, APOGCE 2003

Other

OtherSPE Asia Pacific Oil and Gas Conference and Exhibition 2003, APOGCE 2003
Country/TerritoryIndonesia
CityJakarta
Period9/9/039/11/03

ASJC Scopus subject areas

  • Fuel Technology
  • Geochemistry and Petrology
  • Geotechnical Engineering and Engineering Geology

Fingerprint

Dive into the research topics of 'Carbonate rocks wettability changes induced by microbial solution'. Together they form a unique fingerprint.

Cite this