b'Seismic window activity on the Australian stock market. Follow up wells on the structure failed to find producible oil. During the 20 months it took to complete Rough Range-1, 1A, 1B seven surrounding wells were drilled and all were dry. Rough Range-9 was also dry and Rough Range-10, drilled only 200m from the discovery well, only intersected a disappointingly thin oil column.An extended production test of the discovery well produced 16900 barrels of oil which has been estimated to be 20% of the field recoverable resource.Figure 4.Resistivity (right track) and SP log (left track) across the Rough Range oil column. The colour of hydrogenHydrogen is going to save the world. When combusted it produces nothing but water. However it has to be the right kind of hydrogen. It is common to assign a descriptive colour to hydrogen to indicate its origin. While it is not universal, Table 1 is a handy reference to distinguish between the many colours of hydrogen. If its not green, its not green.Table 1.The colour of hydrogen.Colour DescriptionGreen Electrolysis using electricity from renewable resourcesTurquoise Thermal splitting of methane (noCO 2produced just solid carbon)Yellow Electrolysis using grid electricityWhite Naturally occurring or a by-product of an industrial processPink Electrolysis using nuclear powerPurple Electrolysis using nuclear powerRed Catalytic splitting using nuclear powerBlack Gasification/reforming of black coalGrey Steam reforming of natural gasBrown Gasification/reforming of brown coalBlue Grey or brown hydrogen with CO 2sequestered or reusedFigure 5.Rough Range depth map near top reservoir. Closure is less than 300 m across (map from Sedimentary Basins of WA - WABS2002).35 PREVIEW AUGUST 2022'