Discussion on the Bottom Line of Hydrocarbon Generationof Carbonate Source Rocks in Tarim Basin

HUO Zhi-peng，PANG Xiong-qi，JIANG Tao，SHEN Wei-bing，WANG Wen-yang

doi:10.11764/j.issn.1672-1926.2014.09.1403

Natural Gas Geoscience >

2014 , Vol. 25 >Issue 9: 1403 - 1415

DOI: https://doi.org/10.11764/j.issn.1672-1926.2014.09.1403

Discussion on the Bottom Line of Hydrocarbon Generationof Carbonate Source Rocks in Tarim Basin

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（1.State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum,Beijing 102249，China；
2.Basin & Reservoir Research Center，China University of Petroleum，Beijing 102249，China）

Received date: 2013-11-17

Revised date: 2014-03-06

Online published: 2014-09-10

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Abstract

The carbonate rocks in China have high thermal evolution.Whether they come to the bottom line of hydrocarbon generation or the dead line of hydrocarbon generation is worth studying,which has important significance to the evaluation of the oil-gas potential and exploration value for carbonate rocks in China.According to the mechanism of hydrocarbon generation,retention and expulsion,it was thoroughly investigated through six categories of methods in carbonate source rocks of Tarim Craton basin,which included the methods of variation of organic elements,hydrocarbon generation potential,optimum modeling of organic materials based on material balance principle,thermal simulation experiment,residual amount of hydrocarbons,and expulsed amount of hydrocarbons.The R_O corresponding to the bottom line of hydrocarbon generation which is determined by different methods ranges from 4.2% to 4.9%,with an average value of 4.52%.The depth for the bottom line of hydrocarbon generation in Tazhong area is the biggest,with a depth of 9 200m,a less depth in Tabei and Bachu areas,and the smallest in Tadong area,of 5 850-6 850m.The bottom lines of hydrocarbon generation proposed in this study is similar and bigger than that of some other researchers and accords with the actual geological conditions of hydrocarbon generation.Apart from the Mandong Depression and Gucheng area,all the Cambrian-Ordovician carbonate source rocks in other areas in Tarim Basin Platform had not reached the bottom line of hydrocarbon generation and were still generating a great amount of hydrocarbon.

Key words： Carbonate source rocks; The bottom lines of hydrocarbon generation; Maturity of organic matter; Depth; Tarim Basin Platform

Cite this article

HUO Zhi-peng，PANG Xiong-qi，JIANG Tao，SHEN Wei-bing，WANG Wen-yang . Discussion on the Bottom Line of Hydrocarbon Generationof Carbonate Source Rocks in Tarim Basin[J]. Natural Gas Geoscience, 2014 , 25(9) : 1403 -1415 . DOI: 10.11764/j.issn.1672-1926.2014.09.1403

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