2012, 31(2) 329-338 DOI: ISSN: 1004-5589 CN: 22-1111/P | |||||||||||||||||||||||||||||||||
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Volcanic eruption and its rock characteristics in central-sourthern Songliao Basin | |||||||||||||||||||||||||||||||||
LUO Fu-Gui | |||||||||||||||||||||||||||||||||
Northeast Oil and Gas Branch of SinoPEC��Changchun 130062��China | |||||||||||||||||||||||||||||||||
Abstract��
The author studied the volcanic strata exposed in the central-southern Songliao Basin��including the lithological��lithofacies and assemblage characteristics of volcanic rocks��and analyzed the spatial distribution and eruption�� combined with drilling data�� The results showed that in the central-sourthern Songliao Basin mainly developed acid volcanic rocks with a few basic basalt��andesitic basalt and basaltic andesite�� Eruption patterns were mainly in burst facies��effusive facies and extrusion facies�� The types of reservoir space developed in volcanic rocks were primary pores��secondary pores and fractures�� The upper and middle subfacies of effusive facies��hot detritus flow subfacies of burst facies and volcanic conduic facies were better for finding the petroleum reservoirs�� | |||||||||||||||||||||||||||||||||
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