西南石油大学学报(自然科学版)

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Logging Recognition of volcanic Edifices of Faulted Sequence
in Songliao Basin

Zhang Jianrong, Li Lin   

  1. Jianghan Oil Production Plant,Jianghan Oil Field Company,SINOPEC,Qianjiang,Hubei 433123,China
  • Online:2013-12-01 Published:2013-12-01

Abstract:

Based on the rock texture,volcanic edifices of Yingcheng Formation and Huoshiling Formation in Songliao Basin
were classified into 3 types. They were pyroclastic volcanic edifice,lava volcanic edifice and compound volcanic edifice.
According to the chemical composition of rocks,every type was classified into acid subtype or intermediate-basic subtype.
Based on the number of cones the volcanic edifices were classified into 16 basic types. Most volcanic edifices of Huoshiling
Formation are intermediate and basic lava’s. And most of volcanic edifices of Yingcheng Formation are acid compounds. On the
basis of 544 samples of acid volcanic edifices,the lava’s average of porosity and permeability was bigger,and the pyroclastic’s
was smallest. The discovered gas pool of volcanic rocks revealed that productivity of acid volcanic edifices were higher than
intermediate and basic’s. The gamma average value of intermediate and basic edifices is less than 80 API,and that of the
acid edifices is more than 110 API. More than 70% of the lengths of lava edifices loggings are low amplitude-box shape with
smooth-microjagged. More than 70% of the length of pyroclastic edifice loggings are middle-high amplitude box or bell shape
with jagged-microjagged. The other part is compound volcanic edifice. According to logging response of volcanic edifices,
the logging recognition model of texture is built with variance,variation root,stair slope,down slop,relative difference value
between stair slop and down slop. The component of volcani

Key words: Songliao Basin, volcanic edifice types, logging recognition model, response mechanism