烃源岩生物标志化合物分布特征及其地质意义——以准噶尔盆地腹部地区中二叠统下乌尔禾组为例  

Distribution characteristics and geological significance of biomarkers in source rocks of Lower Wuerhe Formation of Middle Permian in Central Junggar Basin

作　　者：李博偲 李美俊[1,2] 唐友军[1] 师肖飞 陈璇玙 陈林 何大祥[1] LI Bocai;LI Meijun;TANG Youjun;SHI Xiaofei;CHEN Xuanyu;CHEN Lin;HE Daxiang(Cooperative Innovation Centrr of Unconventional Oil and Gas(Ministry of Education&Hubei Province),Yangtze University,Wuhan,Hubei 430100,China;State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum(Beijing),Beijing 100029,China;Exploration and Development Research Institute,Shengii Oilfield Company Limited,SINOPEC,Dongying,Shandong 257000,China)

机构地区：[1]长江大学非常规油气省部共建协同创新中心,湖北武汉430100 [2]中国石油大学(北京)油气资源与探测国家重点实验室,北京100029 [3]中国石油胜利油田分公司勘探开发研院,山东东营257000

出　　处：《东北石油大学学报》2022年第5期68-82,105,I0005,共17页Journal of Northeast Petroleum University

基　　金：国家自然科学基金项目(41972148);非常规油气省部共建协同创新中心(长江大学)开放基金项目(UOG2020-12)。

摘　　要：选取准噶尔盆地腹部地区莫西庄和中Ⅱ区块中二叠统下乌尔禾组烃源岩样品,利用气相色谱—质谱分析技术,分析有机地球化学特征,揭示生物标志化合物对有机质生物来源、热演化和沉积环境的地质意义。结果表明:莫西庄和中Ⅱ区块中二叠统下乌尔禾组烃源岩有机质丰度为中等—好;莫西庄区块有机质来源于低等水生生物和藻类,中Ⅱ区块有机质来源以高等植物为主,有机质类型主要为Ⅱ型;有机质热演化为成熟—高成熟演化阶段,莫西庄区块烃源岩成熟度相对较低。下乌尔禾组烃源岩形成于缺氧—贫氧的湖相沉积环境,水体分层有利于有机质的保存。中Ⅱ区块比莫西庄区块具有更大的生烃潜力。该结果为准噶尔盆地腹部地区油源对比及油气勘探开发提供参考。The source rock samples of the Lower Wuerhe Formation of the Middle Permian in the Moxizhuang and Zhong Ⅱ Block in the central area of the Junggar Basin were selected,and the organic geochemical characteristics were analyzed by gas chromatography-mass spectrometry analysis technology,revealing the geological significance of biomarker compounds for the biological origin of organic matter,thermal evolution and sedimentary environment.The results show that the organic matter abundance of the Middle Permian Lower Wuerhe Formation in the Moxizhuang and Zhong Ⅱ Block is medium to good;the organic matter in the Moxizhuang Block comes from low-level aquatic organisms and algae,and the organic matter in the Zhong Ⅱ Block is mainly higher plants,and the types of organic matter are mainly type Ⅱ;the thermal evolution of organic matter has reached a mature-highly mature evolution stage,and the maturity of the source rocks in the Moxizhuang Block is relatively low.The source rocks of the Lower Wuerhe Formation were formed in an anoxic-oxygen-deficient lacustrine sedimentary environment,and the stratification of water bodies is conducive to the preservation of organic matter.The Zhong Ⅱ Block has greater hydrocarbon generation potential.The results provide a reference for oilsource correlation and oil and gas exploration and development in the central area of the Junggar Basin.

关 键 词：烃源岩 成熟度 生物标志化合物 中二叠统 下乌尔禾组 莫西庄区块 中Ⅱ区块 准噶尔盆地 

分 类 号：TE121[石油与天然气工程—油气勘探]