干旱区生态环境知识资源中心(Arid): 渤海湾盆地廊固凹陷烃源岩特征及其发育模式

Arid

	渤海湾盆地廊固凹陷烃源岩特征及其发育模式
其他题名	Characteristics and depositional models of source rocks in Langgu Sag,Bohai Bay Basin
	刁帆 1; 邹华耀 1; 郝芳 2; 金凤鸣 3; 孙冶华 3; 罗强 3; 师玉雷 3; 梁小娟 3
来源期刊	石油与天然气地质
ISSN	0253-9985
出版年	2014
卷号	35 期号:3 页码:326-335
中文摘要	通过对廊固凹陷古近系沙河街组四段-沙河街组三段下亚段烃源岩热解数据、碳氧同位素和分子地球化学参数的深入分析，探讨了不同构造气候条件下低丰度湖相烃源岩的发育机理。岩石热解和干酪根显微组分分析表明沙河街组四段-沙河街组三段下亚段有机质类型主要为Ⅱ型，有机质丰度存在明显差异。结合区域构造-气候背景以及碳氧同位素和分子地球化学参数，建立了沙河街组四段-沙河街组三段下亚段的烃源岩发育模式。沉积于裂陷初始阶段的沙河街组四段烃源岩，其湖盆宽/深比小，气候干热，水体为咸水-半咸水，发育稳定的盐度分层。有机-无机碳同位素的负偏移与较低的Pr/Ph值反映了相对低的古生产力和较好的保存条件。沙河街组三段下亚段烃源岩沉积于强烈裂陷阶段，湖盆宽/深大，气候温暖湿润，水体为淡水，上、下水体交换相对频繁，发育不稳定的温度分层，碳同位素正偏移以及C_(27)/C_(29)甾烷的变化反映了生产力增高和陆源有机质输入增多。
英文摘要	Rock-Eval data,carbon and oxygen isotopes and molecular geochemical parameters of the source rocks in Es~4(the 4~(th) member of Paleogene Shahejie Fm)-the lower Es~3(the 3~(rd) member of Paleogene Shahejie Fm)in Langgu Sag were integrated to study the formation mechanism of lacustrine source rocks with low abundance under different tectonic and climatic conditions.Rock pyrolysis and kerogens’ maceral composition analysis revealed that the Es~4 and the lower Es~3 are the similar in the major kerogen type of Ⅱ,but are quite different in organic matter abundance.Based on analyses of carbon and oxygen isotopes in the context of regional tectonic and palaeo-climate settings,we established depositional models for the source rocks in Es~4-lower Es~3.The source rock in the Es~4 was deposited in a lake basin at the initial stage of rifting,with low width/depth ratio,arid climate,and brackish water or saline water with stable salinity stratification.Its ~(13)C-depleted of the inorganic and organic matter and lower Pr/Ph might reflect relatively low primary productivity and better organic preservation.In contrast,the source rock in the lower Es~3 was deposited in a lake basin in the intense rifting stage,with a high width/depth ratio,warm and humid climate,fresh water,and frequent water-column overturning with unstable temperature stratification.Its ~(13)C enrichment of the inorganic and organic matter and C_(27)/C_(29) sterane ratios were interpreted to be caused by higher primary productivity and more terrigenous organic matter input.
中文关键词	碳同位素 ; 氧同位素 ; 生物标志物 ; 发育模式 ; 湖相烃源岩 ; 廊固凹陷 ; 渤海湾盆地
英文关键词	carbon isotope oxygen isotope biomarker depositional model lacustrine source rock Langgu Sag Bohai Bay Basin
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENERGY FUELS
WOS研究方向	Energy & Fuels
CSCD记录号	CSCD:5183134
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231683
作者单位	1.(北京)中国石油大学地球科学学院, 北京 102249, 中国; 2.(武汉)中国地质大学, 武汉, 湖北 430074, 中国; 3.中国石油华北油田分公司勘探开发研究院, 任丘, 河北 062552, 中国
推荐引用方式 GB/T 7714	刁帆,邹华耀,郝芳,等. 渤海湾盆地廊固凹陷烃源岩特征及其发育模式[J],2014,35(3):326-335.
APA	刁帆.,邹华耀.,郝芳.,金凤鸣.,孙冶华.,...&梁小娟.(2014).渤海湾盆地廊固凹陷烃源岩特征及其发育模式.石油与天然气地质,35(3),326-335.
MLA	刁帆,et al."渤海湾盆地廊固凹陷烃源岩特征及其发育模式".石油与天然气地质 35.3(2014):326-335.