Abstract:

Simulatoin test of coal measure source rock was made with the samples collected from Huaying reference-1 and Weima-1 Wells in Northeast Tarm Basin.The results indicate that when Ro is more than 0.65%,the ratio of liquid hydrocarbon generation increases rapidly;when Ro is greater than 1.5%,the ratio decreased rapidly;when Ro is 1.0% ,the ratio is 150 kg/t.c and this is the peak of oil generation.The carbonaceous mudstone is similar to coal measures.The Hydrocarbon generation and expulsion of grey mudstone is low.When Ro is nearly 2.5%,the ratio is near to 200 kg/t.c.The division criterion of evolution stage could be established according to the simulation results.

Key words: coal measures, hydrocarbon generation and expulsion, hydrocarbon-generating ratio, evolution stage, Tarim Basin