黔东南麻江—凯里地区烃源岩的有机岩石学特征

Organic petrologic characteristics of hydrocarbon source rocks in Majiang-Kaili area, southeastern Guizhou

王娟 李贤庆 王广利 仰云峰 赵佩 孔龙玺

Wang Juan Li Xianqing Wang Guangli Yang Yunfeng Zhao Pei Kong Longxi

中国矿业大学煤炭资源与安全开采国家重点实验室, 北京 100083 2. 中国矿业大学地球科学与测绘工程学院, 北京 100083 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. 中国石油大学地球科学学院, 北京 102249 5. 中国石油化工股份有限公司石油勘探开发研究院无锡石油地质研究所, 江苏 无锡 214126

State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing 100083, China 2. College of Geosciences and Surveying Engineering, China University of Mining and Technology, Beijing 100083, China 3. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China 4. College of Geosciences, China University of Petroleum, Beijing 102249, China 5. Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, China

应用全岩有机岩石学分析方法,研究了黔东南麻江-凯里地区烃源岩的显微组分组成、生烃组分及有机质热演化.该区烃源岩主要有含沥青碳酸盐岩、泥岩和煤3类,其显微组分含量因样品不同而异,显示非均质性.含沥青碳酸盐岩样品的显微组分总含量(TMC)值为0.8%～13.6%,泥岩样的TMC值为1.4%～9.4%,煤样的TMC值超过70%.该区烃源岩的富氢显微组分主要由壳质组、沥青组、次生有机质和矿物沥青基质构成,其中孢子体、壳屑体、沥青及矿物沥青基质是其主要的生烃组分.该区烃源岩有机质热演化程度处于成熟-过成熟阶段,其等效镜质组反射率Ro为0.674%～2.659%.

By means of whole-rock analysis of organic petrology,the maceral composition,hydrocarbon-generating maceral and thermal evolution of organic matter of hydrocarbon source rocks in Majiang-Kaili area of the southeastern Guizhou province have been studied.The source rock samples from this region mainly include 3 types: bitumen-bearing carbonates,mudstones and coals.The maceral contents of these source rocks vary according to their different samples,showing obviously heterogeneity.The total maceral contents (TMC) of the bitumen-bearing carbonates,mudstones and coals are 0.8%-13.6%,1.4%-9.4%,and over 70%,respectively.The hydrogen-rich macerals of these hydrocarbon source rocks are mainly composed of exinite,asphalt group,secondary organic matter and mineral bituminous groundmass.It is suggested that sporinite,liptodetrinite,bitumen and mineral bituminous groundmass are the main hydrocarbon-generating macerals in this region.Thermal evolution level of organic matter in these hydrocarbon source rocks are among the mature and over-mature stage,with the equivalent vitrinite reflectance (Ro) of 0.674%-2.659%.

国家科技重大专项(2008ZX05005-001-009HZ,2011ZX05007-002);国家重点基础研究计划973项目(2012CB214702);中央高校基本科研业务费专项(2010YM01);高等学校博士学科点专项科研基金项目(20110023110017);油气资源与探测国家重点实验室开放基金(2009004)联合资助

https://doi.org/10.11781/sysydz201202167