Figure 13: The hydrocarbon generation and expulsion from the source rocks in evaporated system of Es4 from the Well Fs2 in Dongying depression. 1-halite,gypsum; 2-salt rock; 3-mudstone; 4-salted-mudstone; 5-ypsumed-mudstone; 6-mudstone included salt (Notes: Tmax, the supreme temperature in thermolysis; Ct, residual organic carbon content; S1, residual dissolved hydrocarbon; S2, pyrolysed hydrocarbon; S1 +S2, residual potential of hydrocarbon generation; Dt, coefficient of residual hydrocarbon degraded; Co, original organic carbon content; So, original capacity of hydrocarbon generation; Sp, amount of hydrocarbon expulsed; Kp,efficiency of hydrocarbon expulsion; HI, index of dissolved hydrocarbon; IH, hydrogen index; Kt, transformation ratio in thermolysis)