| 柴达木盆地狮子沟地区咸水湖相原油饱和烃地球化学特征 |
| |
| 引用本文： | 江凯禧,彭丽.柴达木盆地狮子沟地区咸水湖相原油饱和烃地球化学特征[J].茂名学院学报,2013(3):18-21. |
| |
| 作者姓名： | 江凯禧 彭丽 |
| |
| 作者单位： | 1. 长江大学油气资源与勘探技术教育部重点实验室，湖北武汉430100; 长江大学地球环境与水资源学院，湖北武汉430100
2. 中科院广州地球化学研究所,广东广州,510640 |
| |
| 摘 要： | 柴达木盆地第三系原油大部分为咸水湖相沉积的烃源岩生成，其有机质主要来源于陆生高等植物。应用有机地球化学GC／MS分析技术，对采自柴达木盆地狮子沟地区6口油井的原油样品进行了饱和烃色质分析。分析结果表明：原油样品正构烷烃分布完整，没有受到生物降解作用，在C20～C30内呈现明显的偶奇优势，Pr/Ph值非常低，在0．26．0．33之间，具有强植烷优势；在萜烷类化合物色质图中，伽马蜡烷相对丰度很高，具强升藿烷翘尾巴优势的典型特征；C27、C28、C29甾烷分布呈“V”字型，且以％甾烷为主峰，暗示其母质有咸水湖相水生生物输入。另外选取了甾烷参数C2920S／（S＋R）和C29ββ（ββ＋αα）评价原油成熟度特征，结果表明所有原油样品基本处于低成熟和刚成熟范围内。通过综合分析原油饱和烃色质图特征及各项生标参数，认为柴达木盆地狮子沟地区原油主要为咸水、强还原湖相沉积的烃源生成。
|
| 关 键 词： | 咸水湖相 饱和烃GC MS 狮子沟地区 柴达木盆地 |
Saturated Hydrocarbon Geochemical Characteristics of Saline Lacustrine Oils from Shizigou Area in Qaidam Basin |
| |
| JIANG Kai-xi
,
PENG Li.Saturated Hydrocarbon Geochemical Characteristics of Saline Lacustrine Oils from Shizigou Area in Qaidam Basin[J].Journal of Maoming College,2013(3):18-21. |
| |
| Authors: | JIANG Kai-xi PENG Li |
| |
| Institution: | 1.Key Laboratory of Oil & Gas Resource and Exploration Technology from Ministry of Education,Yangtze University,Wuhan 430100,China;2.School of Earth Environment & Water resources,Yangtze University,Wuhan 430100,China;3.Guangzhou Institute of Geochemistry,CAS,Guangzhou 510640,China) |
| |
| Abstract: | Hydrocarbon- generating for source rocks from the Tertiary salty lacustrine facies in the Qaidam Basin, the source rocks originat- ed from terrestrial higher plants. GC/MS analyses were made on saturated hydrocarbons of off samples from six wells in Shizigou zone. The distribution of normal alkanes is complete, without biodegradation. The nalkanes exhibited strong odd - over- even carbon number pre- dominance among C20- C30 and also shows strong pristane prevalence （the pfistane/phytane ratios ranging from 0.26 to 0.33）. In the GC - MS of terpane compounds shows high abundance of gammaceranes and C35 homohopanes. The＂V＂type of C, C27 、 C28 、 C29 sterane in GC - MS graphics and the main peak at C27, means source material have saline lake facies hydrobios inputs. In addition, the analysis of sterane parameters of C29 20S/（S ＋ R） and C29ββ（ββ＋αα）, shows all the oil samples are in the low mature and mature range. Integrated analysis of Saturated Hydrocarbon GC- MS Characteristics and different biomarker parmneters reveal that the crude oils from Shizigou Area in Qaidam Basin is generated from Tertiary source rocks which the sediment environment is a high - saline lacustrine and strong reduction environment. |
| |
| Keywords: | saline lake facies saturated hydrocarbon GC/MS Shizigou Area Qaidam Basin |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
