A close-up, high-angle indoor photograph depicts a stack of white paper containing handwritten notes in blue ink, primarily consisting of equations and definitions in Portuguese related to fluid dynamics or reservoir engineering

A close-up, high-angle indoor photograph depicts a stack of white paper containing handwritten notes in blue ink, primarily consisting of equations and definitions in Portuguese related to fluid dynamics or reservoir engineering. The top sheet of paper displays "E 0.6" followed by definitions of "Sorw" and "S", capillary pressure equations (`Pc`, `Pcow`, `Pcos`), Darcy's law for single-phase flow, absolute permeability (`k`), and two-phase flow equations for oil and water (`qx`, `qwX`, `Phi_gx`). A small portion of a black object, possibly a pencil case with an "OXFORD" logo, is visible at the top edge of the frame. The tip of a human finger, likely the right index finger, is visible on the right edge, slightly creasing the paper. The environment suggests a brightly lit desk or tabletop. The image provides no specific visual cues to identify a precise location within the city of Almada, Portugal; it is a general indoor scene.