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我国地质历史复杂,多数盆地具有多旋回叠加盆地的特征,多期热演化阶段可能 存在二次或多次生烃的现象.南华北地区地处东秦岭-大别山构造带北缘,属于华北板块南部及其边缘,为一在华北地台基础之上发育起来的中、新生代叠合盆地.震旦纪-三叠纪统一克拉通盆地发育了海相烃源岩,以泥质烃源岩为主.海相烃源岩的有效性评价要考虑烃源岩地球化学特征以及生烃演化特点,青白口系崔庄组/刘老碑组生烃区沿NW-SE向分布于南华北南部,有机质丰度中等,演化程度高,后期生烃潜力有限.下古生界烃源岩主要发育于寒武系底部东坡组/雨台山组,生烃区主要分布于南华北东南部,有机质丰度高,厚度大,存在二次生烃,有较好的生烃潜力.“,”Many of the Chinese basins are characterized by multicyclic superimposition of basins,and secondary or multiple hydrocarbon generation may occur in the multi-stage thermal evolutionary history of the basins.The Southern North China region is located at the north edge of the East Qinling-Dabie Mountain structural belt,as the south part of the North China plate.Mesozoic and Cenozoic superimposed basins are developed on the basement of the North China Platform.In the Sinian-Triassic united craton basins,marine source rocks,mainly argillaceous rocks,were well developed.The geochemical characteristics of source rocks and their bearing on hydrocarbon evolution must be considered for effective evaluation of marine source rocks.As to the Cui Zhuang Group and Liu Lao Bei Group of the Qingbaikou System,hydrocarbon generation area goes in northwest-southeast direction along the southern border of the Southern North China,with medium organic matter abundance,high evolution degree and limited late hydrocarbon potential.The Lower Paleozoic source rocks were developed in Dong Po Group /Yu Tai Shan Group at the bottom of Cambrian.However,the hydrocarbon generation area was mainly distributed in the southeast part of Southern North China.The source rocks are thick and high in organic matter with effective secondary hydrocarbon generation potential and better hydrocarbon prospecting.