新疆石油地质

新疆石油地质 ›› 2006, Vol. 27 ›› Issue (4): 432-434.

• 油气勘探 • 上一篇    下一篇

柴达木盆地马海气田高演化天然气源研究

胡雄, 李延钧, 付晓文, 王强, 梁艳   

  1. 西南石油大学 资源与环境学院, 成都 610500
  • 收稿日期:2005-10-21 修回日期:2006-02-07 出版日期:2006-08-01 发布日期:2020-10-19
  • 作者简介:胡雄(1972-), 男, 四川绵竹人, 助教, 硕士, 油气地球化学,(Tel) 13018210989(M)(E-mail) hux88@tom.com.

A Study on Origin of Highly Evolutionary Natural Gas in Mahai Gas Field, Qaidam Basin

HU Xiong, LI Yan-jun, FU Xiao-wen, WANG Qiang, LIANG Yan   

  1. Institute of Resources and Environment, Southwest Petroleum University, Chengdu, Sichuan 610500, China
  • Received:2005-10-21 Revised:2006-02-07 Online:2006-08-01 Published:2020-10-19

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摘要： 目前,对柴达木盆地东部地区的油气形成研究较多,而针对北部的马海气田研究相对较少,根据马海气田天然气的特征,并结合流体包裹体测试结果、烃源岩的埋藏史和热演化史以及构造发育史指出,马海构造的油气是一期充注的。第一期的油因保存条件差而散失;马海构造只捕获到第二期来自伊北凹陷的高演化天然气。马海气田和南八仙油气田为同一成因类型,南八仙油气田天然气属于高-过成熟煤成气,与伊北凹陷下侏罗统烃源岩有关。

关键词: 柴达木盆地, 烃源岩, 天然气, 有机质, 侏罗系, 包裹体

Abstract: The feature of natural gas in Mahai gas field that was less studied before is integrated with fluid inclusion test results, the burial history and thermal evolution history of source rocks as well as structural development history in this paper. It is indicated that two stages of oil-gas fillings are found in Mahai structure. Oil at the first stage ended in dispersal for poor preservation; at the second stage Mahai structure only captured the highly evolutionary gas from Yibei sag. Gas from Mahai gas field and Nanbaxian field belongs to the same genetic type, but the latter is high-and over-mature coal-formed gas related with Lower Jurassic source rocks in Yibei sag.

Key words: Qaidam basin, source rock, natural gas, organic matter, Jurassic, inclusion

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