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EASY%Ro动力学模拟方法,适合模拟中高热演化程度的盆地模型.为考察松辽盆地滨北地区热演化历史,采用EASY%Ro动力学模拟方法,恢复了该地区的古地温场,结合现今地温场特征,分析了烃源岩热演化历史.结果表明:滨北地区白垩纪古地温梯度高于现今地温梯度,古地温梯度在晚白垩世为4.3~5.8℃/(100m),第三纪以来降低到3.2~3.6℃/(100m);最高古地温是在白垩系末期,有机质热演化在白垩纪末期达到最高峰.自第三系开始的持续抬升剥蚀(白垩纪末至早渐新世为长期沉积间断)和大地热流值衰减降温,致使热演化作用过程“冷冻”,生烃作用停止.
EASY% Ro dynamic simulation method, a basin model suitable for simulating the evolution of medium and high thermal.To investigate the history of thermal evolution in Binbei area of Songliao basin, the EASY% Ro dynamic simulation method was used to restore the paleotemperature field in this area, The results show that the paleogeothermal gradient of the Cretaceous in Binbei area is higher than the current geothermal gradient, and the paleogeothermal gradient is 4.3 ~ 5.8 ℃ / (100m) in the Late Cretaceous and decreases since the Tertiary To 3.2 ~ 3.6 ℃ / (100m). The highest paleogeothermal was at the end of the Cretaceous, and the thermal evolution of organic matter peaked at the end of the Cretaceous. From the Tertiary uplift and erosion (from the end of Cretaceous to the Early Oligocene) Sedimentary discontinuities) and the decay of the temperature of the earth’s heat flow, causing the process of thermal evolution to “freeze” and cease hydrocarbon generation.