新疆石油地质 ›› 2008, Vol. 29 ›› Issue (6): 693-695.

• 油气勘探 • 上一篇    下一篇

柴达木盆地古生界油苗的发现及地质意义

甘贵元, 尹成明, 潘洪峰, 姚熙海, 陈秋丽, 朱叶倩   

  1. 中国石油青海油田分公司勘探开发研究院,甘肃敦煌736202
  • 收稿日期:2008-04-28 发布日期:2020-11-20
  • 作者简介:甘贵元(1961-),男,青海湟中人,高级工程师,博士,石油勘探,(Tel)0937-8925676(E-mail)ggy0803@sohu.com.

Discovery and Its Geological Significance of Oil Seepage of Palaeozoic in Qaidam Basin

GAN Gui-yuan, YIN Cheng-ming, PAN Hong-feng, YAO Xi-hai, CHEN Qiu-li, ZHU Ye-qian   

  1. Research Institute of Exploration and Development, Qinghai Oilfield Company, Petrochina, Dunhuang, Gansu 736202, China
  • Received:2008-04-28 Published:2020-11-20

摘要: 柴达木盆地东部的石炭系、奥陶系的暗色泥岩及灰岩均达到中等-好烃源岩标准。在柴北缘的马北、南八仙和鱼卡地区发现了来源于石炭系的油气。在盆地西部边缘黑水沟地区的奥陶系石灰岩的孔隙中发现了有油质沥青充填,在霍参1 井的上侏罗统红色砂岩岩心中,也发现了可能来自石炭系烃源岩的轻质原油。这些资料表明,古生代柴达木盆地曾有过油气生成、运移和聚集过程,古生界具备油气生成的基本条件,具有良好的油气勘探前景。

关键词: 柴达木盆地, 古生界, 烃源岩, 油苗, 勘探前景

Abstract: The geological survey of field outcrops and the comprehensive analyses of rock samples and the data from drilling and seismic show that the dark mudstone and limestone of Carboniferous and Ordovician in eastern Qaidam basin are medium- good hydrocarbon source rocks. In the northern margin of Qiadam basin, some petroleum has been found in Mabei, Nanbaxian and Yuka areas; in the western margin of this basin, oily bitumen are filled in pores of Ordovician limestone in Heishuigou area; and in red sandstone core from Upper Jurassic in Huocan-1 Well, light crude oil seepage is found probably from Carboniferous source rocks. These data indicate that Qaidam basin had the courses of petroleum generation, migration and accumulation in Paleozoic, so possessing the basic conditions of oilgas generation and the good prospects for oil-gas exploration in Qaidam basin.

Key words: Qaidam basin, Palaeozic, source rock, oil seepage, exploration prospect

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