Study on Organic Maturity of Cambrian Source Rocks in Tarim Platform Area

Abstract

Abstract: More than 100 samples from Cambrian marine source rocks in Tarim basin have been analyzed for the data of the reflectance of primary organic materials,of which only 78 have been gained as effective data. According to the present reflectance data,the Middle and Lower Cambrian source rocks of Tarim basin are in the high mature and over mature phase , no Cambrian source rocks still exist in the maturity phase of oil windows presently, the vitrinite reflectance equivalent (VRE) of Cambrian source rocks in Tazhong uplift and Tabei uplift range from 1.8% to 3%,and higher than 3% in Manjar sag,and higher than 4% in the central area of Manjar sag. The relative low maturity area of the Middle and Lower Cambrian source rocks are located in the high areas of Tazhong uplift and Taibei uplift, and limited area Bachu uplift, with VRE ranging from 1.6% to 2.0%.

Key words: Tarim basin, Cambrian, source rock, organic matter maturity

CLC Number:

TE112.1

WANG Fei-yu, LIU Chang-wei, ZHU Lei, ZHANG Shui-chang, ZHANG Bao-min, LIANG Di-gang. Study on Organic Maturity of Cambrian Source Rocks in Tarim Platform Area[J]. Xinjiang Petroleum Geology, 2002, 23(5): 372-375.

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