渤海湾盆地东营凹陷烃源岩碳氧同位素组成及地质意义

刘庆

doi:10.11781/sysydz201702247

渤海湾盆地东营凹陷烃源岩碳氧同位素组成及地质意义

doi: 10.11781/sysydz201702247

刘庆

中国石化胜利油田分公司勘探开发研究院, 山东东营 257015

基金项目: 国家科技重大专项（2016ZX05006-001）和国家自然科学基金（41072096）资助。

详细信息

作者简介:
刘庆(1970-),男,博士,高级工程师,从事油气地球化学研究。E-mail:Liuq_1230@.163.com。

中图分类号: TE122.113
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出版历程
- 收稿日期: 2016-09-19
- 修回日期: 2017-02-09
- 刊出日期: 2017-03-28

Composition and geologic significance of carbon and oxygen isotopes in hydrocarbon source rocks, Dongying Sag, Bohai Bay Basin

Liu Qing

Exploration and Development Research Institute, SINOPEC Shengli Oil Field Company, Dongying, Shandong 257015, China

摘要

摘要: 对渤海湾盆地东营凹陷沙河街组烃源岩层段开展了系统取样和碳酸盐碳氧同位素分析，并结合文献中的数据资料，在层位精细划分基础上，系统总结了碳氧同位素组成特征及纵向的差异，并探索分析了古湖泊环境的演变过程。沙四段下亚段δ¹³C和δ¹⁸O呈现较好的正相关，指示了断陷初始期盆地封闭性水文地质条件，但其碳氧同位素又整体相对较轻，并且具有从下部向上部逐渐变重的特征，表明盐湖水体不稳定并受到不同程度的淡水影响作用。沙四段上亚段δ¹³C和δ¹⁸O整体呈现较好的正相关且明显加重，指示了断陷加速期咸化湖泊水体环境较为稳定和封闭的特征。沙三段下亚段不同岩性碳酸盐碳氧同位素存在一定差异，其中较好反映烃源岩原始碳氧同位素组成特征的非钙片页岩，其δ¹³C和δ¹⁸O值分布非常集中，指示断陷鼎盛期非常稳定、封闭的半咸化湖泊环境。沙三段中亚段与沙三段下亚段非钙片泥岩数据较为接近，从一定程度上继承了沙三下亚段沉积期湖泊水体的碳氧同位素特征。
- 碳氧同位素 /
- 闭流湖 /
- 湖相烃源岩 /
- 沙河街组 /
- 东营凹陷 /
- 渤海湾盆地
Abstract: Lacustrine hydrocarbon source rocks of the Shahejie Formation in the Dongying Sag were sampled, and the carbon and oxygen isotope composition of carbonates were analyzed. Combined with previous references and precise stratigraphic division, the isotope composition in different stratigraphic units and the evolution of ancient lacustrine environment were discussed. The δ¹³C and δ¹⁸O of carbonates in the lower section of the fourth member of Shahejie Formation are positively correlated, which indicated that the basin was hydrologically closed during the initial period of rifting. But the carbon and oxygen isotopes are relatively light on the whole, which indicated that the water body of the salt lake was not stable, and was frequently influenced by fresh water. The δ¹³C and δ¹⁸O of carbonates in the upper section of the fourth member of Shahejie Formation are relatively heavy and positively correlated, which indicated that the salt lake was closed and stable during the acceleration phase of rifting. The carbon and oxygen isotopes of carbonate rocks with different lithologies in the lower section of the third member of Shahejie Formation varied. The δ¹³C and δ¹⁸O of non-calcium shale vary very little and are highly concentrated, which implied that the brackish lacustrine environment during peak rifting period was very stable and hydrologically closed. The middle and lower sections of the third member of Shahejie Formation have similar properties to the non-calcium shale, which suggested that the former may have inherited the isotope features of the latter.
- carbon and oxygen isotopes /
- hydrologically closed lake /
- lacustrine hydrocarbon source rock /
- Shahejie Formation /
- Dongying Sag /
- Bohai Bay Basin

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参考文献(17)

[1]	刘传联.东营凹陷沙河街组湖相碳酸盐岩碳氧同位素组分及其古湖泊学意义[J].沉积学报,1998,16(3):109-114. Liu Chuanlian.Carbon and oxygen isotopic compositions of lacustrine carbonates of the Shahejie Formation in the Dongying Depression and their paleolimnological significance[J].Acta Sedimentologica Sinica,1998,16(3):109-114.
[2]	刘传联,赵泉鸿,汪品先.湖相碳酸盐氧碳同位素的相关性与生油古湖泊类型[J].地球化学,2001,30(4):363-367. Liu Chuanlian,Zhao Quanhong,Wang Pinxian.Correlation between carbon and oxygen isotopic ratios of lacustrine carbonates and types of oil-producing paleolakes[J].Geochimica,2001,30(4),363-367.
[3]	高玄彧,白宪洲,李勇,等.用碳氧同位素对沱沱河盆地古近纪及新近纪早期气候变化的研究[J].成都理工大学学报(自然科学版),2006,33(1):19-23. Gao Xuanyu,Bai Xianzhou,Li Yong,et al.Study of the climate change in the Tuotuo River Basin by carbon and oxygen isotopes[J].Journal of Chengdu University of Technology(Science & Techno-logy Edition),2006,33(1):19-23.
[4]	刘庆,张林晔,沈忠民,等.东营凹陷湖相盆地类型演化与烃源岩发育[J].石油学报,2004,25(4):42-45. Liu Qing,Zhang Linye,Shen Zhongmin,et al.Evolution of lake-basin types and occurrence of hydrocarbon source rocks in Dong-ying Depression[J].Acta Petrolei Sinica,2004,25(4),42-45.
[5]	姜秀芳.济阳坳陷湖相碳酸盐岩沉积主控因素[J].油气地质与采收率,2011,18(6):23-27. Jiang Xiufang.Main controlling factors of lacustrine carbonate rock in Jiyang Depression[J].Petroleum Geology and Recovery Efficiency,2011,18(6):23-27.
[6]	刘庆,张林晔,宋国奇,等.济阳坳陷古近系沙四段上亚段烃源岩沉积有机相研究[J].高校地质学报,2011,17(4):586-593. Liu Qing,Zhang Linye,Song Guoqi,et al.Sedimentary organic facies of the Palaeogene Upper E_2-3s⁴ source rocks in Jiyang Depression[J].Geological Journal of China Universities,2011,17(4):586-593.
[7]	石泉清,关平,毕彩芹,等.济阳坳陷车西洼陷古近系沙三下亚段-沙四上亚段沉积相类型及分布特征[J].天然气地球科学,2014,25(S1):28-38. Shi Quanqing,Guan Ping,Bi Caiqin,et al.Sedimentary facies types and distribution of sedimentary facies of Upper Sha4 to Lower Sha3 Member in Paleogene in Chexi Sag of Jiyang Depre-ssion[J].Natural Gas Geoscience,2014,25(S1):28-38.
[8]	张林晔,刘庆,张春荣.东营凹陷成烃与成藏关系研究[M].北京:地质出版社,2005:3-34. Zhang Linye,Liu Qing,Zhang Chunrong.Study on the genetic relationships between hydrocarbon occurrence and pools formation in Dongying Depression[M].Beijing:Petroleum Industry Press,2005:3-34.
[9]	蔡观强,郭锋,刘显太,等.东营凹陷沙河街组沉积岩碳氧同位素组成的古环境记录[J].地球与环境,2009,37(4):347-354. Cai Guanqiang,Guo Feng,Liu Xiantai,et al.Carbon and oxygen isotope characteristics and palaeoenvironmental implications of lacustrine carbonate rocks from the Shahejie Formation in the Dongying Sag[J].Earth and Environment,2009,37(4):347-354.
[10]	张海峰,刘庆,张林晔,等.山东东营凹陷古近系沙河街组湖盆演化及烃源岩赋存相带[J].古地理学报,2005,7(3):383-397. Zhang Haifeng,Liu Qing,Zhang Linye,et al.Lacustrine basin evolution and favorable sedimentary facies belt for source rocks aboun-ding in the Shahejie Formation of Paleogene in Dongying Sag,Shandong Province[J].Journal of Palaeogeography,2005,7(3):383-397.
[11]	张林晔,刘庆,徐兴友,等.油气地球化学与成熟探区精细勘探[M].北京:石油工业出版社,2015. Zhang Linye,Liu Qing,Xu Xingyou,et al.Application of petroleum geochemistry in fine exploration in mature exploration areas[M].Beijing:Petroleum Industry Press,2015.
[12]	隋风贵,刘庆,张林晔.济阳断陷盆地烃源岩成岩演化及其排烃意义[J].石油学报,2007,28(6):12-16. Sui Fanggui,Liu Qing,Zhang Linye.Diagenetic evolution of source rocks and its significance to hydrocarbon expulsion in Shahejie Formation of Jiyang Depression[J].Acta Petrolei Sinica,2007,28(6):12-16.
[13]	刘庆,张林晔,沈忠民,等.东营凹陷富有机质烃源岩顺层微裂隙的发育与油气运移[J].地质论评,2004,50(6):593-597. Liu Qing,Zhang Linye,Shen Zhongmin,et al.Microfracture occurrence and its significance to the hydrocarbons expulsion in source rocks with high organic matter abundance,Dongying Depression[J].Geological Review,2004,50(6):593-597.
[14]	中华人民共和国国家发展和改革委员会. 有机物和碳酸盐岩碳、氧同位素分析方法:SY/T5238-2008[S].北京:石油工业出版社,2008. The National Development and Reform Commission of the People's Republic of China. Analysis method for carbon and oxygen isotope of organic matter and carbonate:SY/T5238-2008[S].Beijing:Petroleum Industry Press,2008.
[15]	王冠民,任拥军,钟建华,等.济阳坳陷古近系黑色页岩中纹层状方解石脉的成因探讨[J].地质学报,2005,79(6):834-838. Wang Guanmin,Ren Yongjun,Zhong Jianhua,et al.Genetic analysis on lamellar calcite veins in Paleogene black shale of the Jiyang Depression[J].Acta Geologica Sinica,2005,79(6),834-838.
[16]	Hoefs J.Stable isotope geochemistry[M].Berlin Heidelberg:Springer-Verlag,1997:149-158.
[17]	蔡进功,姜秀芳,范存堂.东营盆地始新统沉积体系及盆地演化[J].沉积学报,1995,13(S1):27-37. Cai Jingong,Jiang Xiufang,Fan Cuntang.Basin evolution and distribution of lacustrine systems in Middle and Upper Eocene Dongying Basin[J].Acta Sedimentologica Sinica,1995,13(S1):27-37.