天然气地质学

准噶尔盆地陆梁油气田白垩系天然气的成因及其地质意义

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  • (1.西南石油学院,四川 成都 610500;2.新疆油田公司研究院,新疆 克拉玛依 834000)
李连民(1978-),男,河南新乡人,在读硕士,主要从事矿产普查与勘探 研究.

收稿日期: 2003-10-12

  修回日期: 2003-11-06

  网络出版日期: 2004-02-20

CRETACEOUS GAS GENESIS OF LULIANG OIL FIELD AND GEOLOGICAL SIGNIF ICANCE IN ZHUNGAER BASIN 

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  • (1.Southwest Petroleum Institute, Chengdu 610500, China; 2.Xinjiang Exploration and Development Institute, Kalamayi 834000, China)

Received date: 2003-10-12

  Revised date: 2003-11-06

  Online published: 2004-02-20

摘要

在准噶尔盆地陆梁油气田白垩系及拐16井侏罗系储层发现了一种组成干、甲烷碳同位素轻的天然气,这种天然气的甲烷碳同位素值为-48.5‰~-56.2‰,甲烷含量高达99.8%,与通常所指的生物气特征相似,并与生物降解油相近或伴生。分析了该天然气的成因,指出它主要是来自储层原油的菌解,另外还有侏罗系浅部煤系地层生物气的贡献。认为菌解气的发现,预示着准噶尔盆地中浅层天然气的勘探具有一定的前景。

本文引用格式

李连民,陈世加,王绪龙,胡守志 . 准噶尔盆地陆梁油气田白垩系天然气的成因及其地质意义[J]. 天然气地球科学, 2004 , 15(1) : 75 -78 . DOI: 10.11764/j.issn.1672-1926.2004.01.75

Abstract

The natural gas,which is dry in the component and  light in the δ13C of methane,is found in Cretaceous reservoir of Luliang  oil field in Zhungaer basin. Its δ13C of methane ranges from -56.2‰ to -48.5‰, methane content is 99.8%, and is similar to biogenic gas.The format ion mechanism of gas is analyzed in the paper,the majority of gas derives reserv oir oil degradation gas, the minority derives the biogenic methane in Jurassic c oal stratum .The finding of reservoir oil degradation gas indicates that the sha llow gas has the certain exploration perspective.

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