| 内蒙古西部额济纳旗雅干地区二叠系埋汗哈达组烃源岩的特征 |
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| 引用本文： | 卢进才,魏仙样,魏建设,李玉宏.内蒙古西部额济纳旗雅干地区二叠系埋汗哈达组烃源岩的特征[J].地质通报,2010,29(2). |
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| 作者姓名： | 卢进才 魏仙样 魏建设 李玉宏 |
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| 作者单位： | 中国地质调查局西安地质调查中心,陕西,西安,710054 |
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| 基金项目： | 中国地质调查局国土资源大调查项目、西北地区中小盆地群油气资源远景调查项目 |
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| 摘 要： | 在对额济纳旗及其邻区石炭系-二叠系的分布特征、岩性特征和沉积环境进行初步研究的基础上,通过对烃源岩展布、有机质丰度和热演化史的研究,结合储、盖务件与保存条件评价,总结了区内石炭系-二叠系油气地质条件.区内残留了厚数千米的上石炭统-上二叠统,岩性组合为碎屑岩+碳酸盐岩+火山岩,反映了裂谷型盆地的沉积特征.广泛发育的浅海陆棚相泥页岩具有较好的生烃条件,以Ⅱ-Ⅲ类干酪根为主,TOC含量中等,R_0一般为0.79%～1.08%,烃源岩演化以成熟为主,部分剖面受构造动力作用的影响达到过成熟.受盆地沉积与演化的控制,区内发育滨岸相砂砾岩、台地斜坡相生物碎屑灰岩、火山碎屑岩(或火山角砾岩)、火山熔岩、风化壳等多种类型的储集层.广泛分布的白垩系为良好的区域盖层,主要成烃期之后的构造作用以坳陷沉降或挤压抬升为主,有利于油气系统的保存.获得了一些与石炭系-二叠系烃源岩有关的油气赋存的信息,显示区内石炭系-二叠系具有良好的油气资源前景.
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| 关 键 词： | 内蒙古 额济纳旗及邻区 石炭系-二叠系 烃源岩 储集层 残留厚度 油气地质条件 |
Characteristics of hydrocarbon source rocks in the Permian Maihanhada Formation in Yagan area of Ejina Banner, western Inner Mongolia, China |
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| LU Jin-cai,WEI Xian-yang,WEI Jian-she,LI Yu-hong.Characteristics of hydrocarbon source rocks in the Permian Maihanhada Formation in Yagan area of Ejina Banner, western Inner Mongolia, China[J].Geologcal Bulletin OF China,2010,29(2). |
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| Authors: | LU Jin-cai WEI Xian-yang WEI Jian-she LI Yu-hong |
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| Abstract: | Based on the study on the lithologic features and hydrocarbon geochemical characteristics of dark mudstone and shale of Permian Maihanhada Formation, the authors summarize longitudinal distribution of source rocks, organic matter abundance, kerogentype and thermal evolution characteristics. The source rocks of Permian Maihanhada Formation are centralized distributed, and the total thickness of dark mudstone and shale is 296.9m. The average organic carbon content is 0.59%, and the values of sample more than0.3% account for 92.86%. The kerogen type is dominated by Ⅱ-Ⅲ type, and the average vitrinite reflectance is 1.08%, which showsthat kerogen has turned into mature stage. Analysis on biomarker of Pr/Ph ranges from 0.64 to 0.78, which shows strong reduction. Itis concluded that the source rocks of Permian Maihanhada Formation have good hydrocarbon generation conditions. |
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| Keywords: | Inner Mongolia Ejina Banner and its vicinity Carboniferous- Permian hydrocarbon source rocks reservoir remnantthickness petroleum geological conditions |
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