摘要
柴达木盆地鱼卡地区中侏罗统石门沟组发育多层油页岩,通过对YYY-1井全井岩心观察和地化分析,在页岩段和含煤段识别出两种类型油页岩。上部页岩段油页岩发育于深湖—半深湖环境中,含油率中等,单层和累计厚度均较大,w(TOC)为5.97%~15.35%,S_1+S_2为29.71~118.62 mg/g,有机质类型主要为Ⅰ型、Ⅱ1型,有机质来源主要以藻类体湖泊生物为主;下部含煤段油页岩发育于湖沼环境中,含油率较高,单层和累计厚度均较小,且与煤和炭质泥岩互层,w(TOC)为13.80%~48.80%,S_1+S_2为39.31~162.12mg/g,有机质类型主要为Ⅱ2型,有机质来源以陆源高等植物为主。沉积环境和有机质来源是影响这两种油页岩矿床差异的关键因素。
Multilayered oil shales are developed in Shimengou Formationof Middle Jurassic Epoch in Yuqia area of Qaidam Basin,with the help of the core observation and geochemical analyses of the whole cores of Well YYY-1,two types of the oil shale were identified in the shale and coal bearing intervals. The upper-interval oil shale was developed in the deep lake-semi deep lake environments,the oil-bearing rate is medium,the single layer and accumulative thicknesses are pretty larger,the organic carbon content w（ TOC） is between 5. 97% to 15. 35 %,and hydrocarbon generating potential（ S_1＋ S_2） is between 29. 71 to 118. 62 mg/g,the types of the organic matter are mainly Type I and Type Ⅱ1,the main source of the organic matter is the lacustrine algae organism; the lower coalbearing oil shale was developed in the lacustrine environment with pretty higher oil-bearing rate,but the single andcumulative thicknesses were rather smaller,and moreover was interbeddedly buried with the coal and carbonaceous mudstone,w（ TOC） is 13. 80%-48. 80% and S_1＋ S_2 is 39. 31-162. 12 mg/g,the types of the organic matter are mainly Type Ⅱ2,the source of the organic matter is mainly terrigenous higher plants. The sedimentary environments and sources of the organic matter are the key factors influencing the mineralizing differences between the two types of the oil shale.
作者
王君贤
刘招君
孙平昌
白悦悦
邓硕
WANG Junxian LIU Zhaojun SUN Pingchang BAI Yueyue DENG Shuo(College of Earth Sciences, Jilin University, Changchun 130061, China Key Lab for Oil Shale and Coexistent Energy Minerals of Jilin Province, Changchun 130061, China National-Local Joint Engineering Laboratory of ln-situ Conversion, Drilling and Exploitation Technology for Oil Shale, Changchun 130021, China})
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2017年第4期168-174,共7页
Petroleum Geology & Oilfield Development in Daqing
基金
中国地质调查局油气资源调查中心战略选区项目(1211302108025-3-1)
中国地质调查局油气资源调查中心地质调查项目(DD20160188-01)
关键词
柴北缘
鱼卡地区
中侏罗统
油页岩类型
有机质特征
成矿差异
North Margin of Qaidam Basin
Middle Jurassic
Yuqia region
oil shale type
organic matter characteristic
mineralizing difference
作者简介
王君贤，男，1992年生，在读硕士，从事矿产普查与勘探方面研究。E-mail：junxian15@jlu．edu．cn
