摘要
对辽河盆地烃源岩的埋藏史、热演化史建立了准三维模型 (X、Y和纵向的地质层段 ,加时间 )并编制了相应程序。模型采用回剥法并考虑了不整合情况以恢复各凹陷的埋藏史 ,根据古地温资料计算相应的TTI史 ,依据TTI—Ro 关系式得出烃源岩Ro 的演化过程 ,进而恢复成熟度演化史。模拟结果表明 :东部凹陷发育了牛居地区和高力房—荣兴屯两个沉积中心 ,西部凹陷发育了台安地区和盘山—大清水沟两个沉积中心 ,大民屯凹陷发育了静安堡以北地区和荣胜堡两个沉积中心 ;东部凹陷沙三段、西部凹陷沙四段及沙三段、大民屯凹陷沙四段及沙三段至今均已全段或大范围进入生油门限 。
The model system, which is an incomplete three-dimensional model (X, Y, vertical geological layers and time) about the buried history and the maturity history of source rock in Liaohe Basin, is built and programmed. The model simulates the buried history of every depression by the Backstripping method while the unconformity is considered. The R o evolution progress of source rock is simulated by TTI-R o relationship after the TTI history is calculated with the paleo-temperature gradients. So, the maturity history is reconstructed. According to the result of model system, there are two deposit centers of East Depression, which are Niuju and Gaolifang-Yongxingtun area, two deposit centers of West Depression, which are Taian and Panshan-Daqingshuigou area, also two deposit centers of Damintun Depression, which are Rongshengbao and the North area of Jinganbao. And Es 3 of East Depression, Es 4 and Es 3 of West Depression, Es 4 and Es 3 of Damintun Depression, which have been in oil window, are main source layers of Liaohe Basin.
出处
《沉积学报》
CAS
CSCD
北大核心
2002年第3期493-498,共6页
Acta Sedimentologica Sinica
