The Intension and Characteristics of Near-source ReservoirsOutside the Source in Hydrocarbon-enriched Mahu Sag,Junggar Basin

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  • (Research Institute of Petroleum Exploration and Development-Northwest,PetroChina,Lanzhou 730020,China)

Received date: 2015-05-20

  Revised date: 2015-08-03

  Online published: 2015-09-20

Abstract

There are obvious differences in oil/gas migration characteristics between the eastern and western basins in China.The eastern basins are dominated by inside-source reservoirs of self-generation and self-storage,while the western complex superimposed basins are dominated by outside-source reservoirs with multiple sources and multiple charges.The “source-controlling theory” and “sag-wide oil-bearing theory” were proposed in light of the static state of reservoir-formation.They are suitable for the eastern basin,but are difficult to guide the oil/gas exploration in the western ones.Based on the analysis of typical oil/gas reservoirs in hydrocarbon-enriched Mahu Sag of Junggar Basin,the concept of “near-source reservoirs” has been proposed in terms of the time-spatial configuration in relation to source rock,conduction system and traps during the reservoir-formation in the view of dynamic reservoir-formation.It means that oil/gas accumulated in the high effective conduction system near the hydrocarbon-generation center and in the formed traps when the hydrocarbon-generation and accumulation matched.This concept has three basic characteristics:near the hydrocarbon-generation center,the effective time-spatial configuration of high-effective conduction system,and the hydrocarbon-expulsion from the source rock in large amount,the well-developed traps,the oil/gas forceful charging with sufficient filling.The further oil/gas exploration for near-source reservoirs in the Mahu Sag should be hierarchically focused on the faulted belt in the west side of Mahu Sag for Jurassic,Triassic,Permian and Carboniferous,the overriding belt for Permian and Manan-Maxi-Mabei slope belt for Permian and Triassic.

Cite this article

PAN Jian-guo,TAN Kai-jun,WANG Guo-dong,YIN Lu,QU Yong-qiang . The Intension and Characteristics of Near-source ReservoirsOutside the Source in Hydrocarbon-enriched Mahu Sag,Junggar Basin[J]. Natural Gas Geoscience, 2015 , 26(S1) : 1 -10 . DOI: 10.11764/j.issn.1672-1926.2015.S1.0001

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