Recognition and Distribution of Shallow Natural Gas in Beidagang Zone of Huanghua Depression
Received date: 2010-03-07
Revised date: 2010-05-27
Online published: 2010-08-10
Documents about shallow natural gas, especially in Alberta basin of Canada, suggest that the shallow gas resources are abundant in the petroliferous basins, with great potential for exploration and development. Here we summarized the logging identification （overlay technique of DTL and NGL, CNL and CDL）of shallow natural gas in the Beidagang zone based on the examples of Gangdong oilfield and Gangxi oilfield in Beidagang zone of Huanghua depression. In macroscopic area, the shallow gas is distributed along the structural high position of Gangdong fault-nose as well as sand bar, channel, abandoned channel and other sandstone body in meandering river. But the single shallow gas reservoir is controlled by lithological change. Most gas reservoirs have different gas/water boundary. The disparate water/oi-gas system which was formed by fault and lithologic lenticular occurs, with the interleaving distribution of water/oil/gas in vertical.
Key words： Beidagang; Shallow natural gas; Logging recognition; Meandering channel.
ZHOU ZongLiang, ZHENG Beng, XIAO JianLing, HUANG JinFu . Recognition and Distribution of Shallow Natural Gas in Beidagang Zone of Huanghua Depression[J]. Natural Gas Geoscience, 2010 , 21(4) : 535 -540 . DOI: 10.11764/j.issn.1672-1926.2010.04.535
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