古隆1井海相地层中高丰度胡萝卜烷的检出及意义

新疆石油地质 ›› 2007, Vol. 28 ›› Issue (5): 585-588.

古隆1井海相地层中高丰度胡萝卜烷的检出及意义

郭建军¹,陈践发¹,陈仲宇²,师生宝¹

1.中国石油大学石油天然气成藏机理教育部重点实验室, 北京 102249;
2.中国石化江汉油田分公司勘探开发研究院, 湖北潜江 433124

收稿日期:2006-11-07 出版日期:2007-10-01 发布日期:2020-08-03
作者简介:郭建军(1974-), 男, 甘肃会宁人, 工程师, 在读博士研究生, 石油地质,(Tel) 010-89734164(E-mail) jianjun_guo@126.com.

High Abundance Carotane from Marine Strata in Well Gulong-1 in Tarim Basin and Its Geological Significance

GUO Jian-jun¹, CHEN Jian-fa¹, CHEN Zhong-yu²

1. Key Laboratory of Oil-Gas Accumulation Mechanism, Ministry of Education, China University of Petroleum, Beijing 102249, China;
2. Research Institute of Exploration and Development, Jianghan Oilfield Company, Sinopec, Qianjiang, Hubei 433124, China

Received:2006-11-07 Online:2007-10-01 Published:2020-08-03

摘要/Abstract

摘要： β-胡萝卜烷是一种全饱和的C40双环烷,常用来指示强还原湖相沉积环境。在塔里木盆地古隆1井奥陶系海相地层中检出了高丰度的β-胡萝卜烷与γ-胡萝卜烷,表明有机质形成于强还原、厌氧沉积环境。系统的地球化学分析表明,有机质曾遭受了生物降解作用,且具有较高的C₂₈甾烷含量(28%~31%)和伽马蜡烷含量m(G)/m(C₃₀H)=0.29~0.39),三环萜烷中以C23为主峰,具有与中-上奥陶统和寒武系烃源岩不相一致的特征。指示了台盆区除了目前已发现的中-下寒武统烃源岩和中-上奥陶统烃源岩外,在古城墟隆起或满加尔凹陷西南坡的下奥陶统或寒武系存在一套形成于强还原水体分层的厌氧沉积环境的烃源岩,并向古城墟隆起发生过供烃过程。

关键词: 塔里木盆地, 古隆1井, β-胡萝卜烷, 烃源岩

Abstract: β-carotane is a saturated C40 dicyclic alkane, which is generally used as an indicator of strongly reducing lacustrine environment. The organic matter detected from marine Ordovician strata in Well Gulong-1 in Tarim basin is characterized by high concentration of C₂₈ sterane (28%~31%) and gammacerane (m(G)/m(C₃₀H)=0.29~0.39), C23 concentration is predominant in tricyclic terpanes. These different features from source rocks of Middle-Upper Ordovician and Cambrian indicate that there is another source rock of Lower Ordovician or Cambian in southwestern slope of Manjiar sag or Guchengxu uplift formed in strongly reducing or oxygen-free sedimentary environment, besides existed Middle-Lower Cambian and Middle-Upper Ordovician source rocks, from which the hydrocarbon drainage had happened toward Guchengxu uplift. The geochemical analysis suggests that these organic maters underwent biodegradation here.

Key words: Tarim basin, Well Gulong-1, β-carotane, γ-carotane, source rock

中图分类号:

TE112.113

郭建军,陈践发,陈仲宇,师生宝. 古隆1井海相地层中高丰度胡萝卜烷的检出及意义[J]. 新疆石油地质, 2007, 28(5): 585-588.

GUO Jian-jun, CHEN Jian-fa, CHEN Zhong-yu. High Abundance Carotane from Marine Strata in Well Gulong-1 in Tarim Basin and Its Geological Significance[J]. Xinjiang Petroleum Geology, 2007, 28(5): 585-588.

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