CHARACTERISTICS AND ORIGIN OF TAR MATS IN YAHA OIL-GAS FIELDS,TARIM BASIN:OCCURRENCE AND MARCROSCOPIC COMPOSITIONAL FEATURES

Zhang Min; Zhang Jun; Mei Bowen

doi:10.11743/ogg19960409

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CHARACTERISTICS AND ORIGIN OF TAR MATS IN YAHA OIL-GAS FIELDS,TARIM BASIN:OCCURRENCE AND MARCROSCOPIC COMPOSITIONAL FEATURES
Vol. 17, Issue 4, Pages: 308-312(1996)
Online First：25 December 1996，

Published：1996
DOI： 10.11743/ogg19960409
稿件说明：

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DOI：

Zhang Min, Zhang Jun, Mei Bowen. CHARACTERISTICS AND ORIGIN OF TAR MATS IN YAHA OIL-GAS FIELDS,TARIM BASIN:OCCURRENCE AND MARCROSCOPIC COMPOSITIONAL FEATURES[J]. 1996, 17(4): 308-312. DOI： 10.11743/ogg19960409.

摘要

利用薄层色谱-氢火焰检测技术(TLC-FID

简称薄层色谱)和岩石热解技术

在塔里木盆地牙哈油气田下第三系陆相油气藏中

发现并准确地鉴定出两层沥青垫。这些沥青垫储层岩石抽提物族组成中

沥青质的相对含量大于30%

而对应的油层中

其值不足20%

在油藏地球化学描述剖面中

沥青垫和油层之间存在着沥青质骤变之趋势

这是沥青垫判识的重要标志。

Abstract

Two tar mats were firstly discovered and determined accurately in Paleogene nonmarineoil-gas pools in Yaha Oilfields

Tarim Basin

by thin layer chromatography-flame ionizationdetector (TLC-FID) and Rock Eval. The relative content of asphaltene in gross compositionof tar mat extracts is more than 30%

but the content in corresponding oil leg is less than20%. In the profile geochemical description of oil reservoirs

sudden changes in asphaltenecontents between the tar mats and oil layers could be seen. This is an important marker todetermine tar mats.