|
|||||
|
|
| 鄂尔多斯盆地苏里格大气田天然气成藏地球化学研究 | |
| 引用本文： | 李贤庆,冯松宝,李剑,王萌,黄孝波,王康东,孔龙玺.鄂尔多斯盆地苏里格大气田天然气成藏地球化学研究[J].岩石学报,2012,28(3):836-846. |
| 作者姓名： | 李贤庆 冯松宝 李剑 王萌 黄孝波 王康东 孔龙玺 |
| 作者单位： | 1. 中国矿业大学煤炭资源与安全开采国家重点实验室,北京100083;中国科学院广州地球化学研究所有机地球化学国家重点实验室,广州510640 2. 中国矿业大学煤炭资源与安全开采国家重点实验室,北京100083;中国矿业大学地球科学与测绘工程学院,北京100083 3. 中国石油勘探开发研究院廊坊分院,廊坊,065007 |
| 基金项目： | 本文受国家科技重大专项(2008ZX05007-003、2011ZX05007-002)、有机地球化学国家重点实验室开放基金(OGL-200808)、国家重点基础研究计划(973)项目(2012CB214702)和中央高校基本科研业务费专项(2010YM01)联合资助. |
| 摘 要： | 苏里格大气田位于鄂尔多斯盆地伊陕斜坡西北部,属于典型的低渗砂岩气田。对天然气组分和同位素组成研究表明,苏里格大气田上古生界天然气以干气为主、湿气为辅,甲烷含量为82.729%~98.407%,干燥系数为84.7%~98.8%,δ13C1值为-36‰~-30‰,δ13C2值为-26‰~-21‰,属于高成熟度的煤成气;气田范围内各井区天然气组分和碳同位素组成变化较小,暗示其来源和成藏过程的一致性。根据储层流体包裹体镜下观察、包裹体均一温度、含烃包裹体丰度、颗粒荧光定量(QGF)、包裹体激光拉曼分析,苏里格大气田上古生界储层发育盐水包裹体、气体包裹体、液态烃包裹体、CO2包裹体等不同类型流体包裹体,主要产于石英次生加大边、微裂隙及胶结物中;包裹体均一温度分布呈连续的单峰态,分布范围为80~180℃,主峰温度为100~145℃;上古生界砂岩储层样品的含烃包裹体丰度不高(多为1%~5%),QGF强度较低(1~10pc)。研究认为,苏里格大气田天然气充注可能是一个连续的过程,主要经历了一期成藏,其主要成藏期为晚侏罗世-早白垩世。通过生气动力学与碳同位素动力学的研究表明,苏里格大气田天然气主要来源于苏里格地区及周缘的石炭-二叠系煤系烃源岩,为近源充注、累积聚气成藏。 |
| 关 键 词： | 天然气成藏 碳同位素 流体包裹体 生气动力学 苏里格大气田 |
| 收稿时间： | 2011/9/30 0:00:00 |
| 修稿时间： | 2011/11/30 0:00:00 |
Geochemistry of natural gas accumulation in Sulige large gas field in Ordos Basin. |
|
| LI XianQing,FENG SongBao,LI Jian,WANG Meng,HUANG XiaoBo,WANG KangDong and KONG LongXi.Geochemistry of natural gas accumulation in Sulige large gas field in Ordos Basin.[J].Acta Petrologica Sinica,2012,28(3):836-846. | |
| Authors: | LI XianQing FENG SongBao LI Jian WANG Meng HUANG XiaoBo WANG KangDong and KONG LongXi |
| Institution: | State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing 100083, China; State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing 100083, China; College of Resources and Safety Engineering, China University of Mining and Technology, Beijing 100083, China;Langfang Branch, Research Institute of Petroleum Exploration & Development, PetroChina, Langfang 065007, China;State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing 100083, China; College of Resources and Safety Engineering, China University of Mining and Technology, Beijing 100083, China;State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing 100083, China; College of Resources and Safety Engineering, China University of Mining and Technology, Beijing 100083, China;State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing 100083, China; College of Resources and Safety Engineering, China University of Mining and Technology, Beijing 100083, China;State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing 100083, China; College of Resources and Safety Engineering, China University of Mining and Technology, Beijing 100083, China |
| Abstract: | The Sulige large gas field is located in the northwestern Yishan slop in Ordos Basin and belongs to the typical low permeability sandstone gas reservoir.Through the analyses of components and carbon isotopes of natural gases,it is demonstrated that the Upper Paleozoic natural gases in the Sulige large gas field are characterized by major dry gases and minor wet gases.The methane contents are in the range of 82.729%～98.407% and the dryness coefficients are 84.7%～98.8%.The carbon isotope of methane and ethane are ranged from-36‰ to-30‰,from-26‰ to-21‰,respectively.This indicates these gases are mainly belonged to the high maturity coal-formed gases.The components and carbon isotopes of natural gases from different wells are varied little in the Sulige gas field,reflecting the similarity of the genesis and reservoir-forming process.Based on the analyses of microscopic observation of fluid inclusion,homogenization temperature of inclusion,hydrocarbon-bearing inclusion abundance,quantitative grain fluorescence(QGF),and laser Raman of fluid inclusion,there are developed different types fluid inclusions,including aqueous inclusion,gas inclusion,oil inclusion,and CO2 inclusion in Upper Paleozoic reservoirs in the Sulige large gas field.These inclusions are mainly distributed in quartz overgrows,fissures and cementations.The measured homogenization temperature of fluid inclusions shows the continuous single peak,which their homogenization temperatures are ranged from 80～180℃ and the main peak temperature is 100～145℃.The abundances of hydrocarbon-bearing inclusions are not high(mainly 1%～5%) and the QGF intensity is relatively lower(1～10pc) in the Upper Paleozoic sandstone reservoirs.It is suggested that natural gas in the Sulige large gas field may be charged by a continuous process,and experiences one main gas accumulation period,mainly occurring at the Late Jurassic and Early Cretaceous.The kinetic results of gas generation and carbon isotope show that natural gas in the Sulige large gas field are mainly derived from Carboniferous-Permian coal measure source rocks in the Sulige region,belonging to the near-source gas charging and cumulative gas accumulation. |
| Keywords: | Accumulation of natural gas Carbon isotope Fluid inclusion Gas generation kinetics Sulige large gas field |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |
| 点击此处可从《岩石学报》浏览原始摘要信息 | |
| 点击此处可从《岩石学报》下载免费的PDF全文 | |