Discovery of Carboniferous source rocks in the north margin of Qaidam Basin and its geological significance

doi:10.7623/syxb200604008

Editorial office of ACTA PETROLEI SINICA ›› 2006, Vol. 27 ›› Issue (4): 36-39.DOI: 10.7623/syxb200604008

• Petroleum Exploration • Previous Articles Next Articles

Discovery of Carboniferous source rocks in the north margin of Qaidam Basin and its geological significance

Shao Wenbin^1,3, Peng Licai², Wang Liqun³, Zhu Sijun³

1. School of Mining and Satefy Engineering, China University of Mining and Technology, Beijing 100083, China;
2. Tsinghua University, Beijing 100084, China;
3. PetroChina Qinghai Oilfield Company, Dunhuang 736202, China

Received:2005-09-02 Revised:2006-01-20 Online:2006-07-25 Published:2010-05-21

柴达木盆地北缘井下石炭系烃源岩的发现及其地质意义

邵文斌^1,3, 彭立才², 汪立群³, 朱思俊³

1. 中国矿业大学资源与安全工程学院, 北京, 100083;
2. 清华大学, 北京, 100084;
3. 中国石油青海油田公司, 甘肃敦煌, 736202

作者简介:邵文斌,男,1964年9月生,2003年获中国矿业大学博士学位,现为青海油田公司高级工程师,主要从事石油地质研究及科研管理工作.E-mail:shaowbqh@petrochina.com.cn
基金资助:
国家"十五"科技攻关项目"重点前陆盆地大中型气田形成主控因素与富集规律"(2004DA616A-04)部分成果.

Abstract

Abstract: The Carboniferous Formation of paralic facies in the north margin of Qaidam Basin was drilled in the Gaqiu-1 Well for the first time.The organic matters of the Carboniferous hydrocarbon source rock are abundant.The total organic carbon (TOC) in carbargillite is 1.85 percent in average,and TOC in limestone is 0.42 percent.The type of organic matter in limestone is type-II kerogen.The maturity of hydrocarbon source rock in this area is Midium.The biomarker data of Mabei-2 Well,distribution of Gammacerane/C₃₁ homohopane ratio of different oilfield or drillings and other hydrocarbon source rocks,and the distribution of Ar(argon) isotope of the wells nearby are all correlation with the Carboniferous hydrocarbon source rock of Gaqiu-1 Well.It is suggested that hydrocarbon generation,oil and gas migration and reservoir formation may be induced by the found source rock in the area.

Key words: north margin of Qaidam Basin, Carboniferous, hydrocarbon source rock, geochemical characteristic, oil-source rock correlation, hydrocarbon reservoir

摘要： 在柴达木盆地北缘,尕丘1井首次钻遇了石炭系海陆交互相地层.该井石炭系烃源岩的碳质泥岩有机碳含量平均为1.85%,灰岩有机碳含量平均为0.42%;灰岩母质类型属于Ⅱ型干酪根;烃源岩成熟度中等.尕丘1井石炭系烃源岩与马北2等井的原油生物标志物、柴达木盆地北缘不同油田(或油井)及烃源岩的伽马蜡烷/C₃₁升藿烷值分布特征以及尕丘1井周边井天然气中氩同位素分布特征均有一定的可比性和相关性,说明该套烃源岩在柴达木盆地北缘可能曾经发生过生烃、运移和聚集成藏的过程.

关键词: 柴达木盆地北缘, 石炭系, 烃源岩, 地化特征, 油源对比, 油气藏

CLC Number:

TE112.113

Shao Wenbin, Peng Licai, Wang Liqun, Zhu Sijun. Discovery of Carboniferous source rocks in the north margin of Qaidam Basin and its geological significance[J]. Editorial office of ACTA PETROLEI SINICA, 2006, 27(4): 36-39.

邵文斌, 彭立才, 汪立群, 朱思俊. 柴达木盆地北缘井下石炭系烃源岩的发现及其地质意义[J]. 石油学报, 2006, 27(4): 36-39.

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Discovery of Carboniferous source rocks in the north margin of Qaidam Basin and its geological significance

柴达木盆地北缘井下石炭系烃源岩的发现及其地质意义

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