STUDY OF CLAY DISTURBANCE IN THE RESERVOIRS AND ITS EFFECT ON PRODUCTION

Abstract

Clay minerals are a critical component of sedimentary rocks and can significantly impact oil and gas reservoirs. Clay migration and swelling are widely documented as the primary causes of oil recovery impairment. This study, conducted in the Gedinnean reservoirs of El Ouabed, aimed to examine the influence of clay minerals on permeability reduction. Through the use of X-ray powder diffraction (XRPD), hyperspectral camera analysis, logging interpretation, and laboratory experimental tests, it has been concluded that clay minerals, particularly non-swelling clay minerals such as kaolinite and illite, can migrate and block pore throats, causing permeability reduction in the reservoirs. Additionally, the use of oil-based mud can further impact reservoir permeability through alterations in wettability. These findings emphasize the significance of comprehending clay mineral behavior and its implications for effective reservoir management and oil recovery.