Abstract: Seismic reflection characteristics of Permian volcanic rocks in the Tarim Basin were summarized and illustrated by using large number of exploration data from Tarim oil field, and then logging-seismic integrated recognition model was established. Meticulous characterization of Permian volcanic rocks?spatial distribution was achieved through comprehensive study of outcrop, drilling, logging and 2D seismic data. The Remnants of the Permian basalt in the Tarim basin cover an area of about 2. 46 ×10⁵ km², and the remnants of the Permian rhyolite cover an area of about 4.04×10⁴ km². As Permian stratas are missed in most area of north and east Tarim Basin, original Pemian volcanic eruption area may be much larger than residual area. This study lays foundation for further understanding of Permian volcanism in Tarim basin.

Key words: Tarim, Permian, volcanic rocks, spatial distribution, seismic

摘要： 利用塔里木油田的大量勘探资料, 通过野外露头、钻井、测井、2D 地震资料的综合研究, 确定了塔里木盆地内二叠系火山岩的地震反射特征, 建立了火山岩测井-地震综合识别模式, 精细刻画了盆地内二叠系残余火山岩的空间展布情况。在此基础上计算得出:盆地内二叠系残余玄武岩覆盖面积约为 2. 46 ×10⁵ km², 盆地内二叠系残余流纹岩覆盖面积约为4.04 ×10⁴ km²。由于盆地内北部和东部二叠系大范围缺失, 盆地内二叠系火山岩原始喷发面积和喷出量可能远大于残余量。该研究对塔里木二叠系大火成岩省的进一步认识具有重要意义。

关键词: 塔里木, 二叠系, 火山岩, 空间展布, 地震