Hydrocarbon Generation Simulation of Hydrocarbon Source Rocks in Dishuiquan Formation, East Junggar Basin

The hydrocarbon potential of the dark mudstones In Wu-lungu Depression is significant for the exploration in East Junggar Basin. In this study one sample from Dishuiquan section is selected for hydrocarbon source rocks evaluation using a series of thermal simulations. As the simulation temperature reached 360 ℃ , the oil generation rate reach 21. 61 mg CH/g rock and shows a sudden decrease. This phenomena indicates that the source rocks locate in the lower part of the oil window with a moderate remnant hydrocarbon potential. As the simulation temperature reached 390℃, the cumulative hydrocarbon gas generation rate amounts to 178.66 ml CH/kg rock, and the total CH4 in the hydrocarbon gas is 90%. These indicate that the source rocks are better for gas generation and reaching the dry gas stage. As the gas products belongs to hu-mic mixing type based on the carbonate isotopes characteristics, we conclude that the source rocks are Ⅱ2, type.