三江盆地绥滨坳陷中生界生烃潜力  

Hydrocarbon-generating Potential in Mesozoic Suibin Depression of Sanjiang Basin

作　　者：朱春俊[1] 王延斌[1] 

机构地区：[1]中国矿业大学(北京)煤炭资源与安全开采国家重点实验室,北京100083

出　　处：《天然气地球科学》2011年第2期307-314,共8页Natural Gas Geoscience

基　　金：国家自然科学基金项目(编号:49972054)资助

摘　　要：三江盆地绥滨坳陷蕴藏着丰富的油气资源,具有较好的勘探前景。利用三江盆地绥滨坳陷现有钻井的有机碳和热解数据,从有机地球化学方面对坳陷中生界主力煤系烃源岩的生烃特征及潜力进行了研究。结果表明：研究区有机显微组分以惰质组为主,但壳质组和腐泥组中存在较多富氢组分的孢子体、壳屑体和矿物沥青基质。有机质类型以Ⅲ型为主,其次为II型。其中城子河组和穆棱组有机质类型相对较好,为2套具生烃潜力的煤系烃源岩。烃源岩有机质成熟度较高,RO值变化范围主要集中在0.5%-1.0%之间,绝大部分都已进入生油阶段,且部分烃源岩已进入高成熟—过成熟阶段,转为以生气为主。Using existing well drilling data of organic carbon and thermal decomposition in Suibin depression of Sanjiang basin,from the organic geochemistry aspect we conducted the research of hydrocarbon characteristic and hydrocarbon-generating potential of main coal-bearing source rock from Mesozoic of the depression.The results indicated that in research area vitrinite is the main organic maceral while abundant sporinite,exitinite and fluorescence,which have rich hydrogen components,in liptinite and saprope.The organic matters mostly are of III type and someⅡtype.The organic matter type of the Chenghezi group and the Muling group are relatively better,with two sets of source rocks having better hydrocarbon potential.The organic matter maturity of the hydrocarbon source rocks is high and the vitrinite reflectance varies from 0.5% to 1.0%,which means the major part of the hydrocarbon source rocks have entered the oil generation stage,and the partial hydrocarbon source rocks have been high mature-over mature and entered the gas generation stage.

关 键 词：绥滨坳陷 煤系烃源岩 有机地球化学 生烃潜力 

分 类 号：TE122.1[石油与天然气工程—油气勘探]