Principal Controls on the Formation of Volcanic Reservoir (Carboniferous) in Luxi Area of Junggar Basin
Received date: 2010-02-06
Revised date: 2010-04-18
Online published: 2010-06-10
By the observation of core and analysis of microscopic flakes and scanning electron microscope, the feature of the Carboniferous volcanic rocks in the Luxi district of Junggar basin was discussed, including volcanic lithology, pore type, oil and gas evidence, and diagenesis. The lithology of main volcanic reservoir in the study area is dominated by volcanic lava (basalt and andesite) and pyroclastic rocks (tuff and volcanic breccia). The pore type is dissolution pore and the secondary dissolution. The volcanic lava has a good oil and gas evidence.The volcanic reservoir become a good stored body only after weathering and leaching, fracture and dissolved reformation later. The laumontite filling in the study area would make a positive role of the formation of high quality reservoir. Finally, the pattern of porosity evolution for different types of volcanic rocks was setup.
Key words: Volcanic rocks; Reservoir space; Diagenesis; Laumontite; Geologic control.
LI Xiao-Yan, WANG Qi, SHI Ji-An, MA Xiao-Feng, HAO Yue-Wei, ZHANG Rui, WANG Huan . Principal Controls on the Formation of Volcanic Reservoir (Carboniferous) in Luxi Area of Junggar Basin[J]. Natural Gas Geoscience, 2010 , 21(3) : 449 -457 . DOI: 10.11764/j.issn.1672-1926.2010.03.449
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