In order to determine the best oil shale sampling length in Qinghai province ,through carrying out the system field geology work and getting the chemical testing data of oil shale sample ,analyzed the geological and industrial quality characteristics of the oil shale in Qinghai province ,then applied the analogy method ,the statistical analysis technique and the reduce data method to determine the best sampling length for meeting the technical requirements and economic efficiency .The result shows that the coal bed sampling specification cannot be completely used ;the normal distribution of oil rate in Y-1Y and Y-6Y drilling is logarithmically distributed by statistical analysis ,The normal distribution is similar to that of molybdenum , tungsten and precious metals ,so using statistical analysis technique to determine the best sampling length between 1 .5 and 2 meters ;the best sampling length is 1 meter with the reduce data method in Y-1Y drilling , which are sampled by encryption of shale deposits .%为确定青海油页岩勘查过程中油页岩的最佳采样长度(以下简称"样长"),在系统开展野外地质工作和样品采集化验基础上,分析认识青海油页岩地质特征,分别用类比法、统计学方法和试验法,得出技术和经济方面均合理的最大样长.结果显示:① 由于油页岩与同为固体可燃有机岩煤的宏观识别程度、有用组分的变化过程和分布均匀程度均存在差异,所以不能完全参考煤的采样规格;② 通过统计分析Y-1Y和Y-6Y井油页岩含油率正态分布类型为对数分布,与许多钼、锡、钨以及贵金属矿床的典型样品数据正态分布形态类似,可类比其样长规格,确定油页岩样长为1.5~2.0m;③ 对Y-1Y井中选定的加密采样层段含油率数据应用减稀法得出最大样长为1.5m或1.6m.
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