It has been established that maximum oil yield (on kerogen basis) is achieved at 430 degrees C for Dictyonema shale from Estonia. Further heating improves neither quantity nor quality of the oil obtained, but energy requirements grow noticeably; therefore, it is not desirable to process this shale at higher temperatures. As a result, prospects of co-processing kukersite and Dictyonema shale are not encouraging: the optimum final temperature of heating is different for each of these shales.