A method and apparatus for hydrocarbon recovery andor treatment of frac water includes introducing a volume of water into a formation, recovering the introduced water, with the recovered introduced water further comprising suspended hydrocarbon product. In an embodiment of the method, two computed tomography pictures from which two image data records are reconstructed are recorded in conjunction with two different spectral distributions of the x-radiation. The computing device receives a first user input in connection with the first portion of the display device, and, at substantially the same time, also receives a second user input in connection with the second portion of the display device.