| 作 者：曹竣锋1,2，宋春彦1,2，付修根1,2，陈 明1,2，郑 博1,2，孙伟1,2 |
| 单 位：（1 中国地质调查局成都地质调查中心；2 国土资源部沉积盆地与油气资源重点实验室） |
| 基金项目：中国地质调查局“青藏地区海相碳酸盐岩成藏条件与有利勘探区带评价”项目资助 |
| 摘 要： |
| 前人对羌塘盆地的烃源岩研究资料主要来源于中生界地表露头，少见古生界的。对羌资5井二叠系展金组烃源岩的钻井岩心研究表明，其有机碳含量高，平均值达到1.15%，属于好烃源岩。干酪根显微组分主要为Ⅲ型，其次为Ⅱ2型；有机质主要来自于海相低等水生生物，热演化已达到成熟阶段。烃源岩具较好的生气能力。认为井下烃源岩样品虽显示其处于有机质演化成熟阶段，但因受后期构造抬升的影响，推测二叠系深部未知的烃源岩可能尚处于高成熟—过成熟阶段。羌塘盆地二叠系具有较好的勘探前景，油气勘探可向深部古生界开展。 |
| 关键词：羌塘盆地；二叠系 展金组；烃源岩；有机地球化学特征；有机质成熟度 |
| Author's Name: Cao Junfeng，Song Chunyan，Fu Xiugen，Chen Ming，Zheng Bo，Sun Wei |
| Institution: Chengdu Center of China Geological Survey |
| Abstract: |
| Most of information about the source rocks was commonly taken from the analysis data of Mesozoic strata outcrops but hardly any from Paleozoic strata in Qiangtang Basin in the past because of virgin exploration. Analysis samples are from a group of drilled cores of Permian Zhanjin source rock from Well Qiangzi-5 that was solely drilled in the plateau basin recently. The result of organic geochemical analysis shows that Zhanjin source rock belongs to the rank “good” for high TOC values (the average 1.15%) and good kerogen types of dominant Type-Ⅲ and seldom Type-Ⅱ2. Organic matter generally derived from marine low-grade aquatic organism and thermally evolved into mature stage, which means good gas-generating capacity of the source rocks. The core samples from the well have demonstrated organic matter being mature; but even so, affected on late tectonic uplifting, the unknown Permian source rocks that are deeply buried probably are high mature or over mature. It is implied that the deeply-buried Permian source rocks are of good prospective for oil and gas exploration in the basin. |
| Keywords: Qiangtang Basin; Permian; Zhanjin Formation; Source rock; Organic geochemical characteristics; Organic maturity |
| 投稿时间： 2014-04-02 |
