Palynological analyses contribute to characterising the amount, type and maturity of organic matter in sedimentary rocks, and thus assist in determining what are potential, effective and post-mature source rocks. Measurement of the volume of organic matter recovered after de-mineralization of the samples provides a guide as to whether the sediments contain sufficient organic matter to be considered as likely sources of significant amounts of hydrocarbons. Volumetric measurements are equated to ranges of total organic carbon content. Measured organic yields of very low, but mainly low and above, indicate possible source rocks. Analysis of the proportions of different types of organic matter recovered from the processing of palynological samples allows determination of the kinds of hydrocarbons that the sediments could generate on reaching a sufficient maturity level. The various hydrocarbons are generated in known sequence along with increasing maturity of the organic matter as it is heated during burial. With progressive heating the colour of the organic matter changes from yellow through orange and brown to black. These colour changes can be calibrated against other measures of thermal maturity, e.g. vitrinite reflectance. Palynological kerogen analysis techniques have been applied to Cooper and Eromanga Basin well samples since the early 1980s. In this synthesis, data from reports written since 1984 are presented in chart form for siltstone / claystone prone stratigraphic intervals ranging from the Patchawarra Formation to the Murta Member of the Mooga Formation. All results plotted are derived from drill core or sidewall core materials only. Data for rock sequences in which spore coloration indicates high thermal maturity (brown spore colour, = >1.0% reflectivity) are plotted on separate charts for each formation. On each chart, the vertical axis shows the volumetric yield of organic matter from a rock sample, while the horizontal axis shows the relative oil-generative potential it has (given that virtually all types of organic matter will generate gas as a primary, and in part, for some, as a secondary product after oil). This oil potential relates to the proportion and type of macerals that are otherwise determined by transmitted light and fluorescence microscopy. The distribution of the maximum recorded oil proneness at present for each of the stratigraphic units studied are displayed as a set of maps, which record the highest lipid-rich proportion noted within that unit for each well sampled. However, palynological indications of the source rock quality of these sediments should always be considered in conjunction with an awareness of their past as well as their present degree of thermal maturity, since at any location each rock unit's former generative history will influence its remaining potential for oil expulsion.