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为了系统地评价礼乐盆地的生烃潜力，探讨盆地的烃源岩特征及其动态演化过程，文章采用BMPES盆地模拟与油气评价系统对盆地的生烃系统特征进行了综合评价研究，认为盆地主要发育Mz、E₁1-E₂2、E₃1 3套烃源岩，古新统—中始新统和中生界是盆地的主力烃源岩，其有机碳丰度在0.2%~2.0%之间，干酪根类型以Ⅱ-Ⅲ型为主；盆地具有中值地热场特征，幅值在50~90 mW/m2之间，其新生界生油、生气门限分别为2800~3200 m和4700~5000 m；古新统—中始新统烃源岩在早渐新世末开始进入生烃高峰期，中中新世末瞬时生烃量达到最大值，其生烃量可占整个盆地生烃量的86%；盆地具有较好的油气资源潜力，新生界总累计生烃量约689.79×108t，南部坳陷是盆地的主力生烃坳陷。

Hydrocarbon-generation System Characteristics of Lile Basin

In order to evaluate systematically the hydrocarbon generation potential in Lile Basin and to discuss the source rock features of the basin and its dynamic evolution processes,a comprehensive evaluation research on the hydrocarbon generation system characteristics of the basin was carried out by use of BMPES (basin modeling and petroleum evaluating system).Through research it was considered that there are three series of source rocks,i.e.Mesozoic (Mz),Lower Paleocene Midd Eocene (E１１-Ｅ２２) and Lower Oligocene (E３１),in the basin,the Mz and Ｅ１１-Ｅ２２ being the main source rocks with organic carbon abundances of 0.2%—2.0% and Types Ⅱ-Ⅲ kerogenes;this basin is of median geothermal field with a variation of 50—90 mW/m２ and the oil generation and gas generation threshold depths of Cenozoic in the basin are 2800—3200 m and 4700—5000 m respectively;and the Ｅ１１－Ｅ２２ source rocks had been entering into the most active hydrocarbon generation time at the end of Oligocene,the instantaneous hydrocarbon generation amount reaching the maximum at the end of Middle Miocene and their hydrocarbon generation quantity accounting for 86 percent of the total hydrocarbon generation quantity of the whole basin.In a work,this basin has a fairly good hydrocarbon resource potential;the accumulated hydrocarbon generation amount in Cenozoic is about 68.979×１０９t;and the southern depression is the main hydrocarbon generation depreession in the basin.