Investigation Pore Geometry Wettability Preference in Oolitic Oil Reservoir: Pore Scale Imaging and Modelling Study

This study evaluates the wettability preference of Oolitic fresh core plug from a native Kuwaiti reservoir. This Oolitic calcite formation hosts hundreds of spherical grains (ooids) with thousands of pore-shapes. Thousands of tortuous pore/ grain-wall boundaries and their subsequent shapes are captured, of which boundaries geometry, size, and distribution are processed in an Oolite matrix images format. Level of information is reported at different magnifications X40 (mm), X400 (μm), and X4000 (nm), where statistical wettability contact angle distinct morphological feature is closely examined. The objective of this study is to investigate the size and shape driven static contact angle measured by 2D technology digitally captured images of available fresh cores utilizing SEM-BSE segmentations, of which high-quality images are generated. In abstract, the method utilizes counting complete contact angles manifested at pore area and pore/ grain -wall boundary system, which is scale-characterized at: pore-body, pore-throat, and nano-pores available in these Oolitic core plugs. However, in specific, pore-wall boundary contact angle wettability performance and recovery efficiency contributions is also captured, measured, processed and modeled. To model natural pore-wall boundary system static contact angle wettability is to understand the new physics that will advance reservoir characterization and production improvement.