陆相页岩油有机质来源与沉积环境分析——以苏北盆地高邮凹陷花庄地区古近系阜宁组二段为例  

Organic matter sources and depositional environment analysis of continental shale oil:a case study of Paleogene second member in Funing Formation in the Huazhuang Area,Gaoyou Sag,Subei Basin

作　　者：陈洋 尹楠鑫 陈岑 尤启东[3] 孔维军[4] 李立峰[4] 王馨玥 赵娅 曾强浩 CHEN Yang;YIN Nanxin;CHEN Cen;YOU Qidong;KONG Weijun;LI Lifeng;WANG Xinyue;ZHAO Ya;ZENG Qianghao(School of Petroleum and Natural Gas Engineering,Chongqing University of Science and Technology,Chongqing 401331,China;Chongqing Key Laboratory of Complex Oil and Gas Field Exploration and Development,Chongqing University of Science and Technology,Chongqing 401331,China;Development Department,SINOPEC Jiangsu Oilfield Company,Yangzhou,Jiangsu 225009,China;No.1 Oil Production Plant,SINOPEC Jiangsu Oilfield Company,Yangzhou,Jiangsu 225009,China;School of Resources and Environment,Yangtze University,Wuhan,Hubei 403100,China)

机构地区：[1]重庆科技大学石油与天然气工程学院,重庆401331 [2]重庆科技大学复杂油气田勘探开发重庆市重点实验室,重庆401331 [3]中国石化江苏油田分公司江苏油田开发部,江苏扬州225009 [4]中国石化江苏油田分公司江苏油田采油一厂,江苏扬州225009 [5]长江大学资源与环境学院,湖北武汉403100

出　　处：《东北石油大学学报》2024年第6期17-30,48,I0002,共16页Journal of Northeast Petroleum University

基　　金：重庆市自然科学基金项目(cstc2020jcyj-msxmX0869)。

摘　　要：苏北盆地高邮凹陷油气资源丰富,勘探开发潜力较高。以高邮凹陷花庄地区阜宁组二段(阜二段)典型页岩样品为研究对象,采用气相色谱—质谱联用(GC-MS)技术对生物标志化合物进行分析,采用X线衍射(XRD)法对黏土矿物进行定量测试,采用电感耦合等离子体质谱仪(ICP-MS)进行微量元素分析,明确有机质来源和沉积环境。结果表明:研究区有机质主要来源于低等水生生物,形成于还原环境。阜二段沉积早期以寒冷干旱的气候为主,降雨量较少;阜二段沉积后期降雨量逐渐增大,过渡到温暖湿润的气候。阜二段沉积早期水体环境为咸水环境,沉积后期水体咸度逐渐降低。潮湿条件下形成的湖泊是油页岩沉积的先决条件,缺氧还原环境与咸水沉积环境是有机质富集的关键因素。该结果对苏北盆地高邮凹陷花庄地区页岩油勘探具有指导意义。The Gaoyou Sag in the Subei Basin is rich in oil and gas resources,with high potential for exploration and development.This study focuses on typical shale samples from the second member of the Funing Formation(E 1 f 2)in the Huazhuang Area of the Gaoyou Sag.Gas chromatography-mass spectrometry(GC-MS)was used to analyze biomarkers,X-ray diffraction(XRD)was employed for quantitative analysis of clay minerals,and inductively coupled plasma mass spectrometry(ICP-MS)was applied for trace element analysis to determine the organic matter sources and depositional environment.The results indicate that the organic matter in the study area primarily originated from lower aquatic organisms and was deposited in a reducing environment.During the early deposition of E 1 f 2,the climate was predominantly cold and arid with low precipitation,transitioning to a warm and humid climate with increasing rainfall in the later stage.The early depositional environment was characterized by saline water,while salinity gradually decreased in the later stage.The formation of lakes under humid conditions was a prerequisite for oil shale deposition,while an anoxic reducing environment and saline depositional conditions were critical for organic matter enrichment.These findings provide valuable guidance for shale oil exploration in the Huazhuang Area of the Gaoyou Sag in the Subei Basin.

关 键 词：页岩油 有机质来源 古环境 陆相 阜宁组二段 古近系 花庄地区 高邮凹陷 苏北盆地 

分 类 号：TE122[石油与天然气工程—油气勘探] P595[天文地球—地球化学]