塔里木盆地东南断陷区侏罗系沉积特征及含油性研究

A STUDY OF SEDIMENTARY CHARACTERISTICS AND PETROLLFEROUSNESS IN THE JURASSICSEQUENCES OF THE FAULT REGION, THE SE TARIM BASIN

陈荣林 朱洪发 陈跃 罗月明 刘仿俊

Chen Ronglin Zhu Hongfa Chen Yao Luo Yueming Liu Fangjun

地矿部石油地质中心实验室 无锡214151

Central Laboratory of Geology, MGMR

作者等在新疆且末县其格勒克侏罗系地层剖面中发现了10层含油砂岩,累计厚达103m,这在塔里木盆地东南断陷尚属首次。该含油砂岩的油源属于浅海相成油母质,来自下伏古生界地层,其储层为中侏罗统洪积-河流相砂体,上侏罗统80余米的暗色泥岩为直接盖层,该含油组合在该拗陷内有一定的代表性,因而这一发现对该区的含油性评价、勘探目的层段的选择提供了方向。

Ten oil-bearing sandstone beds with a thickness up to 103m were discovered in thesections of the Jurassic sequences,Zhenggeleke,Qiemo County,Xinjiang. This is the firstdiscovery in the region of the SE Tarim Basin,It is suggested that the petroleum source inthe oil bearing sandstones should be attributed to shallow marine source rocks of the un-derlying Paleozoic sequerices and the reservoir should be composed of Middle Jurassic dilu-vial-fluvial sand body,while the upper Jurassic dark mudstone with a thickness of 80mact as its immediate cap bed.Since this kind of source, reservoir and seal assemblege foroil/gas pools is very popular in the region,this discovery provides a guideline to the petro-liferous evaluation and the selection of exploratory prespects in this region.

https://doi.org/10.11781/sysydz199404339