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PETROLEUM SOURCE ROCKS IN THE TSUGARU BASIN, NORTH HONSHU, JAPAN

日本北本州津轻盆地的石油源岩

基本信息

批准号：
62540609
负责人：
UJIIE Yoshihiro
金额：
$ 0.83万
依托单位：
HIROSAKI UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1987
资助国家：
日本
起止时间：
1987 至 1988
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-62540609/
关键词：
Kerogen Petroleum Source rock 石油ビジュアルケロジェン法

项目摘要

This study investigates the petroleum source rock potential of the Neogene Tertiary muddy sediments of the Tsugaru Basin of western Aomori. More than 100 kerogens included in these sediments and 7 kerogens comprised in the Neogene Tertiary sediments of the Oga oil field for reference were examined by elemental analysis, visual kerogen method, nuclear magnetic resonance and vitrinite reflectance. The major part of the Neogene Tertiary sediments in the Thugaru Basin contain low-potential type III or II-III kerogens. But the Upper Miocene Odoji and the Lower Pliocene Akaishi Formation in the central part of the basin include high-potential type I or II kerogens. These formations have suffered burial diagenesis depper than 2,000 meters and their organic matter should be matured to exceed the threshold of intense oil generation (vitrinite reflectance value of 0.5%). The kerogen contents of sediments in the Odoji and the Akaishi Formation are mostly more than 1%. These organic geochemical characters of the formations compare with those of the Onnagawa and the Funakawa formation accepted as source rocks in the Oga oil field. Therefore it is concluded from total viewpoint of the organic content, type and maturity that the Upper Miocene to the Lower Pliocene strate, namely the Odoji and the Akaishi Formation, in the central part of the Tsugaru Basin have good potential for petroleum generation.

本研究调查了青森县西部津轻盆地新近纪第三纪泥质沉积物的石油源岩潜力。采用元素分析、目视干酪根法、核磁共振和镜质体反射率等方法对这些沉积物中所含的100多种干酪根以及Oga油田新近纪第三系沉积物中所含的7种干酪根进行了分析。 Thugaru 盆地新近纪沉积物的主要部分含有低潜力的 III 型或 II-III 型干酪根。但盆地中部上中新统Odoji和下上新统赤石组含有高潜力的I型或II型干酪根。这些地层埋藏成岩作用深度超过2000米，有机质成熟度应超过强烈生油阈值（镜质体反射率值为0.5%）。 Odoji组和赤石组沉积物干酪根含量大多在1%以上。这些地层的有机地球化学特征与男鹿油田被认为是烃源岩的 Onnakawa 和 Funakawa 地层的有机地球化学特征进行了比较。因此，从有机质含量、类型和成熟度综合来看，津轻盆地中部上中新统至下上新统地层，即小土寺组和赤石组具有良好的生油潜力。