I'm a bit in a rush so I will comment the code later.
I hope this can inspire
you.

The Code
\documentclass{report}
\usepackage[utf8x]{inputenc}
\usepackage{fancyhdr}
\usepackage[left=4cm,top=6cm,right=3cm,bottom=3cm,headheight=5cm]{geometry}
\pagestyle{fancy}
\usepackage{tikz}
\usetikzlibrary{calc}
\usepackage{tikzpagenodes}
\renewcommand{\headrulewidth}{.2pt}
\lhead{\begin{tikzpicture}[remember picture,overlay]
\node [anchor=west,inner sep=0] (logoLEFT) at (current page header area.west) {\includegraphics[height=3cm]{logoSX}};
\node [anchor=east,inner sep=0] (logoRIGHT) at (current page header area.east) {\includegraphics[height=3.5cm]{logoDX}};
\coordinate (tt) at ($(logoLEFT.east)!.5!(logoRIGHT.west)$);
\node [above=.5cm,font=\bfseries\Large] at (tt) {Centro Universitário da FEI};
\node [below=.5cm,font=\bfseries\Large] at (tt) {Projeto de Iniciação Científica};
\end{tikzpicture}}
\begin{document}
\section{First section}
Type your document as usual!
\newpage
\section{Second section}
Type your document as usual!
\end{document}