摘要
为测试南祁连冻土中下侏罗统窑街组烃源岩中有机质丰度、有机质类型和有机质成熟度,利用岩石热解测试方法,测得窑街组有机碳含量的平均值为7.141%,游离烃平均值为0.432 mg/g、热解烃平均值为4.636 mg/g、产油潜率平均值为5.068、残余碳平均值为29.04mg/g、产率指数为0.273、有效碳平均值为0.421%,烃指数平均值为47.085;有机质的类型主要为Ⅱ2型和Ⅲ型;有机质的热演化达到了成熟阶段。窑街组中泥质岩类的有机质较为丰富,是一套很有潜力的烃源岩。
To analyze the richness, type and maturity of organic matter of South Qilian permafrost of Middle- Lower Jurassic Yaojie formation, rock pyrolysis test was conducted. The average organic carbon content is 7. 141% and the average free hydrocarbon is 0. 432 mg/g. The pyrolysis hydrocar- bon is 4. 636 mg/g and the average oil potential rate is 5.068. The average residual carbon is 29.04 mg/g and the yield index is 0. 273. The average effective carbon is 0. 421% and hydrocarbon index is 47.085. The type of organic matter are mainly type Ⅱ 2 and type Ⅲ. The thermal evolution of organic matter reached mature or high mature stage. It means that the mud rock is rich in organic matter, and the Middle - Lower Jurassic is the potential hydrocarbon source rock.
出处
《青海大学学报（自然科学版）》
2015年第1期73-77,共5页
Journal of Qinghai University(Natural Science)
基金
中国地质调查局油气资源远景调查项目(GZHL20110311)
青海省科技厅自然科学基金项目(2012-Z-705)
关键词
南祁连冻土区
窑街组
有机质丰度
有机质类型
有机质成熟度
South Qilian permafrost
Yaojie formation
organic abundance
organic matter type
thematurity of organic matter
