鄂尔多斯中部气田下古生界水溶气成因

李贤庆; 侯读杰; 胡国艺; 张爱云; 柳常青

doi:10.11743/ogg20020303

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鄂尔多斯中部气田下古生界水溶气成因
ORIGIN OF LOWER PALEOZOIC DISSOLVED GASES IN CENTRAL GAS FIELD OF ORDOS
2002年23卷第3期页码：212-217
网络首发：2002-09-25，

纸质出版：2002
DOI： 10.11743/ogg20020303
稿件说明：

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李贤庆, 侯读杰, 胡国艺, 等. 鄂尔多斯中部气田下古生界水溶气成因[J]. 石油与天然气地质, 2002,23(3):212-217. DOI： 10.11743/ogg20020303.

Li Xianqing, Hou Dujie, Hu Guoyi, et al. ORIGIN OF LOWER PALEOZOIC DISSOLVED GASES IN CENTRAL GAS FIELD OF ORDOS[J]. 2002, 23(3): 212-217. DOI： 10.11743/ogg20020303.

摘要

鄂尔多斯中部气田下古生界水溶气以高甲烷含量为特征

含有少量重烃和非烃组分

基本显示出高成熟过成熟的干气特征 (C

1～5

0.95)。该区下古生界水溶气组成存在“东、西差异”(东部区块水溶气的C

重烃、苯和甲苯含量较高

而西部区块水溶气的C

重烃、苯和甲苯含量低或缺失)

揭示了东部、西部区块水溶气的来源是不同的。东部区块水溶气具有上古生界煤成气和下古生界油型气的混合贡献

西部区块水溶气主要来自下古生界的油型气。

Abstract

Characterized by higher contents of methane

the lower Paleozoic dissolved gases in central gas field in Erdos have a little amount of heavy hydrocarbon and non- hydrocarbon compositions basically indicating a dry gas feature of high-over maturation(C

1-5

0.95). Differences between "East block

West block" in compositions of the lower Paleozoic dissolved gases(high contents of heavy hydrocarbon C

benzene

toluene in compositions of dissolved gas in the east block while in the west block above compositions are either very low or absent) reveal that east and west block dissolved gases come from different sources. Dissolved gases from the east block are combinations of coal-formed gas in the upper Paleozoic and oil-type gas in the lower Paleozoic

whereas dissolved gases from the west block mainly come from oil-type gas in the lower Paleozoic.