西南石油大学学报(自然科学版)

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松辽盆地断陷层火山机构测井响应特征

张建荣,李林   

  1. 中国石化江汉油田江汉采油厂,湖北潜江433123
  • 出版日期:2013-12-01 发布日期:2013-12-01

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

摘要:

根据岩石结构,可将松辽盆地营城组和火石岭组火山机构划分为碎屑岩类、熔岩类和复合类,各类火山机构
根据岩石化学成分又可细分为酸性岩型和中基性岩型。中基性岩火山机构的伽马平均值小于80 API,酸性岩火山机
构的伽马平均值大于110 API。当低幅光滑–微齿箱形–漏斗形的曲线长度超过声波时差或密度曲线的70% 时为熔岩
火山机构,当中–高幅齿化—微齿箱形–钟形/漏斗形的曲线长度超过声波时差或密度曲线的70% 时为碎屑熔岩,处
于二者过渡的则为复合火山机构。基于地质属性–测井响应关系,据此反映曲线的齿化程度参数(方差、变差方根)、
形态参数(上/下斜率及其二者的相对差值)可将测井曲线划分为6 类,其中两类对应熔岩类火山机构,四类对应于碎
屑(熔)岩类火山机构。结合伽马值参数可进行火山机构测井识别。

关键词: 松辽盆地, 火山机构类型, 测井识别模型, 响应机理

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