内蒙古天草凹陷油气生成的盆地数值模拟及油气资源远景分析  

Numeric Basin Modeling and the Prospect of Petroleum Resources of Tiancao Depression

作　　者：林卫东[1] 周永章[1] 郝银全[2] 张虎权[3] 付善明[1] 

机构地区：[1]中山大学地球环境与地球资源研究中心∥地球科学系,广东广州510725 [2]中国石油勘探开发研究院,北京100083 [3]中国石油勘探开发研究院西北分院

出　　处：《中山大学学报（自然科学版）》2005年第3期105-108,共4页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：中国石油"十五"油气勘探科技工程资助项目(200204-06)

摘　　要：利用BASIMS盆地模拟系统对银根-额济纳旗盆地天草凹陷白垩系烃源岩的油气生成进行了模拟研究。模拟结果表明,白垩系烃源岩的油气生成过程经历了早白垩世早中期初步生排烃阶段,早白垩世中晚期大规模生排烃阶段和晚白垩世以来生排烃停滞阶段3个时期,全区累计生烃1836 80Mt,下白垩统巴音戈壁组烃源岩是天草凹陷的主力烃源岩层系,其生排烃量占总量的90%。用聚集系数法计算的天草凹陷的总资源量为0 74×108t,在同规模、同等勘探程度的油气勘探新区中是很有资源远景的地区之一。Based on BASIMS basin modeling system, the hydrocarbon generation of the Cretaceous source rock in the Tiancao depression, Yingen_Ejinaqibasin was simulated. The simulated results show that hydrocarbon generation of the Cretaceous source rock involves three stages including primary generation period in the early and middle Early Cretaceous stage,large scale generation stage in the middle and late Early Cretaceous stage and the generation stagnant period since the Late Cretaceous.The total amount of hydrocarbon generated in geological history is 1836\^80 million tons,90% of which were generated by Bayingebi formation source rock of the Lower Cretaceous. The total quantity of oil and gas sources is 74 million ton, which is assessed by accumulation coefficient method. This indicates that the Tiancao depression is one of the areas with source prospect.

关 键 词：油气生成 盆地数值模拟 凹陷 天草 远景分析 油气资源 内蒙古 银根-额济纳旗盆地 早白垩世 主力烃源岩 巴音戈壁组 生排烃 模拟研究 模拟系统 模拟结果 生成过程 晚白垩世 下白垩统 资源远景 油气勘探 勘探程度 白垩系 

分 类 号：P618.130.1[天文地球—矿床学] TE12[天文地球—地质学]