羌塘盆地胜利河油页岩历史最大埋深  

Maximum buried depth for the Shenglihe oil shale in the Qingtang basin

作　　者：何江林[1,2] 付修根[2] 郭天旭[3] 孙涛[4] 

机构地区：[1]中国地质科学院研究生院,北京100037 [2]中国地质调查局成都地质矿产研究所,四川成都610081 [3]中国石油大学油气资源与探测国家重点实验室,北京102249 [4]中国科学院气体地球化学重点实验室,甘肃兰州730000

出　　处：《大庆石油学院学报》2009年第6期11-18,共8页Journal of Daqing Petroleum Institute

基　　金：国家自然科学基金项目(40702020)

摘　　要：在统计和分析目前常用地层剥蚀量计算方法优缺点的基础上,结合羌塘盆地胜利河油页岩剖面中的机质成熟度、孢粉组合、地温梯度等资料,运用Barker等提出的Ro-Tmax关系模型,计算胜利河油页岩的历史最大埋深为1998.95m.由该方法得出的地层古温度(97.917℃)与实测流体包裹体均一温度、其他2个经验模型模拟结果均较为一致;地层历史最大埋深(1998.95m)与通过区域地层对比法估算得出的地层埋深(1888～2838m)也较为一致,表明在勘探初期仅有浅层地质资料的情况下,运用Ro-Tmax关系模型计算地层历史最大埋深为盆地定量研究和降低油气勘探风险的一种有效方法.Nowadays,there are many methods for calculating the denudation thickness of stratum. On the basis of the statistics and analysis of the advantages and disadvantages of these methods,combined with the characteristics of organic matter maturity,palynoflora,geothermal gradient in Shenglihe oil shale section,this paper calculates the maximum buried depth of the Shenglihe oil shale based on Barker's model. The result shows that the maximum burial depth of the Shenglihe oil shale is 1 998.95 meter. The value of paleo-geotherm [97.917 ℃] derived from this model coincided with the data from the bore well homogenization temperature of fluid inclusions and the results derived from another two empirical models. The maximum buried depth [1 998.95 m] derived from the model coincided with the depth [1 888~2 838 m] obtained by the method of regional stratigraphic correlation. Therefore,it is concluded that the method for getting the maximum buried depth by Barker's model is an effective way to reduce the risk of exploration and quantitative research in the basin,in the condition that only shallow geological information is available.

关 键 词：剥蚀量 盆地分析 羌塘盆地 油页岩 古地温 湖底温度 

分 类 号：P531[天文地球—古生物学与地层学]