地质科学
     首页 | 过刊浏览 |  本刊介绍 |  编委会 |  投稿指南 |  期刊征订 |  留言板 |  批评建议 |  联系我们 |  English
地质科学  2008, Vol. Issue (3): 518-532    DOI:
论文 最新目录 | 下期目录 | 过刊浏览 | 高级检索  |   
川东宣汉地区天然气地球化学特征及成因
朱扬明1, 王积宝1, 郝芳2, 邹华耀2, 蔡勋育3
1. 浙江大学地球科学系, 杭州, 310027;
2. 中国石油大学, 北京, 102249;
3. 中国石油化工股份有限公司南方勘探开发分公司, 昆明, 650200
Geochemical characteristics and origin of natural gases from Xuanhan area,eastern Sichuan
Zhu Yangming1, Wang Jibao1, Hao Fang2, Zou Huayao2, Cai Xunyu3
1. Department of Earth Sciences, Zhejiang University, Hangzhou 310027;
2. Faculty of Natural Resources and Information Technology, China University of Petroleum, Beijing 102249;
3. Southern Division, China Petroleum & Chemical Corp., Kunming 650200
 全文: PDF (3609 KB)   HTML( )   输出: BibTeX | EndNote (RIS)      背景资料
摘要 依据10余口探井60多个气样的化学成份和碳同位素组成数据,结合烃源岩和储层沥青分析资料,系统剖析了四川盆地东部宣汉地区普光、毛坝场等构造带天然气地球化学特征,并探讨了其成因及来源。研究结果表明:这些构造带中飞仙关组—长兴组天然气为高含硫化氢的干气,天然气化学成份表现出古油藏原油裂解气的特点。其烃类气体中以甲烷为主(高于99.5%);富含非烃气体,CO2和H2S平均含量分别达5.32%和11.95%。甲烷碳同位素较重(-33‰~-29‰),表征高热演化性质;乙烷δ13C值主要分布在-33‰至-28‰范围,属油型气。这些天然气与川东邻近气田的同层位天然气具有同源性,而与石炭系气藏天然气在化学成份、碳同位素组成上有所不同,意味着有不同的气源。硫化物硫同位素和沥青元素组成证实高含量的H2S是气藏发生TSR作用所致。δ34S值表征层状沉积成因的硬石膏是TSR作用的反应物,而脉状硬石膏则是其残余物。储层的孔隙类型可能与TSR作用强度和H2S含量高低有联系,裂缝型气层中H2S少,孔洞型储层中H2S丰富。乙烷、沥青和各层系烃源岩干酪根碳同位素对比表明研究区飞仙关组—长兴组气藏天然气主要来自二叠系烃源层。
服务
把本文推荐给朋友
加入我的书架
加入引用管理器
E-mail Alert
RSS
作者相关文章
朱扬明
王积宝
郝芳
邹华耀
蔡勋育
关键词天然气化学成份   碳同位素   TSR作用   普光气田   川东地区     
Abstract: Based on the molecular and stable carbon isotope compositions of over 60 gas samples collected from more than 10 exploration wells,in combination with the analytical data of source rocks and reservoir bitumen,the geochemical characteristics and origin of gases mainly from the Puguang and Maobachang gas traps in Xuanhan area,eastern Sichuan,were investigated.The studied results indicated that the natural gases in the reservoirs of traps of Feixianguan-Changxing Formation belonged to dry gas with high amounts of H2S,and showed a molecular composition features of the gas cracking from oil previously reservoired in the traps.The gases were dominated by methane in hydrocarbon component with dryness index mostly more than 0.99,and contained abundant no-hydrocarbon components with CO2 and H2S average concentration being 5.32 and 11.95% respectively.The methane was isotopically heavy(-33‰~-29‰),suggesting a high level of thermal maturity,and the δ13C values for ethane ranged mainly from-33‰ to-28‰ indicative of sapropelic organic source.The studied gases were believed to have a common source with the gases from same reservoir age strata in adjacent gas fields in the eastern Sichuan Basin,but different in origin with Carboniferous reservoired gases due to different molecular and carbon isotope compositions.The high concentration of H2S was considered to be derived from TSR on sulfur isotopes for sulfide and element compositions of reservoir bitumen.Sulfur isotopes revealed that the layered anhydrite was the reactant for TSR,whereas the anhydrite vein appeared to be derived from precipitation of the reactive fluid.It was noted that TSR and derived H2S abundance were possibly associated with the porosity type of their gas reservoirs.H2S in gases from fractured reservoirs was less significantly than one in gases from corroded reservoirs.The carbon isotope correlation between ethane,bitumen and source rock kerogens showed that the gases in the reservoirs of Feixianguan-Changxing Formation were mainly derived from the Permian strata.
Key wordsChemical components of natural gas   Carbon isotopes   TSR   The Puguang gas field   Eastern Sichuan   
收稿日期: 2007-09-07;
引用本文:   
朱扬明,王积宝,郝芳等. 2008, 川东宣汉地区天然气地球化学特征及成因. 地质科学, (3): 518-532.
Zhu Yangming,Wang Jibao,Hao Fang et al. Geochemical characteristics and origin of natural gases from Xuanhan area,eastern Sichuan[J]. Chinese Journal of Geology, 2008, (3): 518-532.
 
没有本文参考文献
[1] 吴晓智 周刚 何登发 王小娟 郭秋麟 郑民. 四川盆地川东地区高陡构造形成机制与天然气聚集[J]. 地质科学, 2019, 54(4): 1100-1113.
[2] 何宏, 李红霞, 张科, 陶小晚, 蔡春芳. 塔中地区奥陶系喜马拉雅山期S干气充注的证据[J]. 地质科学, 2014, 49(4): 1327-1336.
[3] 孙占学, 高柏, 张展适. 赣南地热气体起源的同位素与地球化学证据[J]. 地质科学, 2014, 49(3): 791-798.
[4] 薛海涛, 刘海英, 卢双舫, 霍秋立, 徐庆霞, 李吉君. 松辽盆地徐深1井气藏气源的氢、碳同位素特征[J]. 地质科学, 2009, 44(2): 635-644.
[5] 钱玲, 卢玉红, 黄龙藏, 胡文革, 张秋茶, 汪海, 何芬贤. 塔里木盆地喀什凹陷克拉托天然气来源分析及聚气特征[J]. 地质科学, 2007, (2): 253-266.
[6] 王招明, 赵孟军, 张水昌, 宋岩, 肖中尧, 王清华, 秦胜飞. 塔里木盆地西部阿克莫木气田形成初探[J]. 地质科学, 2005, (2): 237-247.
[7] 朱扬明, 苏爱国, 梁狄刚, 程克明, 彭德华. 柴达木盆地西部第三系咸水湖相原油地球化学特征[J]. 地质科学, 2004, (4): 475-485.
[8] 窦立荣, 程顶胜, 张志伟. 利用油藏地质地球化学特征综合划分含油气系统[J]. 地质科学, 2002, (4): 495-501.
[9] 王国安, 韩家懋. 中国西北C-3植物的碳同位素组成与年降雨量关系初探[J]. 地质科学, 2001, (4): 494-499.
[10] 赫英, 朱兴国, 徐培苍. 胜利油田火山岩单个包裹体碳同位素[J]. 地质科学, 1998, (3): 380-383.
[11] 郑永飞, 傅斌, 张学华. 岩浆去气作用碳硫同位素效应[J]. 地质科学, 1996, (1): 43-53.
[12] 陈锦石, 闻传芬, 钟华, 刘培伦. 古生代海洋碳同位素演化[J]. 地质科学, 1995, (4): 338-347.
[13] 王忠诚, 范德廉, 陈锦石. 大巴山下寒武统黑色岩系中毒重石矿床的成因探讨[J]. 地质科学, 1992, (3): 237-248.
 
版权所有 © 2009-2017 《地质科学》编辑部
地址:北京9825信箱  邮政编码:100029
电话:010-82998109  010-82998115
京ICP备05029136号-10