摘要
通过岩心观察和取样分析,对海拉尔盆地乌尔逊及贝尔凹陷优质烃源岩发育特征进行精细描述,并与普通烃源岩进行对比。研究表明:1)研究区优质烃源岩与砂岩纵向交互频繁,排烃效率高。优质烃源岩是在还原—强还原环境下沉积形成,而普通烃源岩是在氧化—弱氧化的环境下沉积形成;2)优质烃源岩有机质的赋存状态以层状富集为主,有机质呈平行或基本平行层理分布。而普通烃源岩中有机质分布呈斑块状,分布不均匀,或断续纹层状;3)优质烃源岩生烃潜力大,是普通烃源岩的10倍以上;4)优质烃源岩具有高有机碳和相对低氯仿沥青"A"的特征,反映研究区砂泥互层剖面中优质烃源岩的排烃效率高。
Through observing cores and sampling analysis,the development characteristic of high quality hydrocarbon source rocks of Wuerxun and Beier depression in Hailaer Basin are fine description,and carries on the contrast with the ordinary hydrocarbon source rocks.Research shows that： 1）Research area high quality hydrocarbon source rock and sandstone are longitudinal interactive frequently,and the hydrocarbonexpulsion efficiency is high.High quality hydrocarbon source rocks are formative in the reductivestrong reductive environment,however,the ordinary hydrocarbon source rocks are formative in the oxidized—strong oxidized environment.2）Organic matter of highquality hydrocarbon source rocks is in the form of occurrence layered enrichment,organic matter in parallel or basic parallel bedding distribution.However,organic matter of the ordinary hydrocarbon source rocks is plaques form,uneven distribution,or intermittent layer; 3）The hydrocarbon generating potential of highquality hydrocarbon source rocks is high,which is ordinary hydrocarbon source rocks the 10 times above.4）Highquality hydrocarbon source rocks have the feature of high organic carbon and relatively low chloroform bitumen “A”,which reflect research area in mud interbed of sand section of highquality hydrocarbon source rocks have a high efficiency of hydrocarbonexpulsion.
出处
《地质科学》
CAS
CSCD
北大核心
2011年第4期1009-1016,共8页
Chinese Journal of Geology(Scientia Geologica Sinica)
基金
国家自然科学基金项目(编号:40972101)
国家重点基础研究发展计划"973"项目(编号:2009CB219306)资助
关键词
海拉尔盆地
优质烃源岩
生烃潜力
发育特征
有机质赋存状态
Hailaer Basin, High quality hydrocarbon source rock, Hydrocarbon generating potential, Development characteristic, Occurrence of organic matter
