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| 南大巴山前缘黄龙组古岩溶储层锶同位素地球化学特征 | |
| 引用本文： | 文华国,郑荣才,沈忠民,张兵,蔡家兰,罗爱军,朱宜新.南大巴山前缘黄龙组古岩溶储层锶同位素地球化学特征[J].吉林大学学报(地球科学版),2009,39(5). |
| 作者姓名： | 文华国 郑荣才 沈忠民 张兵 蔡家兰 罗爱军 朱宜新 |
| 作者单位： | 1. 成都理工大学,油气藏地质及开发工程国家重点实验室,成都,610059 2. 中国石油西南油气田分公司,重庆气矿,重庆,400021 3. 中国石油西南油气田分公司,川东开发公司,重庆,400021 |
| 基金项目： | 国家自然科学基金项目 |
| 摘 要： | 南大巴山前缘黄龙组古岩溶储层划分为弱溶蚀岩溶岩、中等溶蚀多孔状岩溶岩、强溶蚀角砾状岩溶岩和强溶蚀交代的次生灰质岩溶岩等4种类型,以非溶蚀岩为对比参照物,系统分析了各类岩溶岩的锶同位素组成.结果表明:岩溶过程中的87Sr/86Sr值,具有从渗流-活跃潜流带的正偏移,至静滞潜流带逐渐转化为强烈负偏移的演化趋势;在同一岩溶水流体的水-岩反应体系中,基质组分相比角砾对87Sr的富集作用更强,而次生灰质岩溶岩相比白云质岩溶岩缺乏富集87Sr的锶同位素分馏效应;不同成因类型和溶蚀强度的岩溶岩具有高87Sr/86Sr值特征,主要与参与古岩溶作用水-岩反应的古陆地下水富87Sr壳源锶的注入以及白云质基质岩对87Sr具有强富集作用有关.各类岩溶岩锶同位素特征,可为预测和评价研究区黄龙组古岩溶储层发育条件及时空展布规律提供地球化学信息. |
| 关 键 词： | 古岩溶储层 锶同位素 地球化学 岩溶流体 黄龙组 南大巴山 |
Geochemical Characteristics of Strontium Isotope of the Paleokarst Reservoirs in the Huanglong Formation at the Margin of Southern Daba Mountain |
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| WEN Hua-guo,ZHENG Rong-cai,SHEN Zhong-min,ZHANG Bing,CAI Jia-lan,LUO Ai-jun,ZHU Yi-xin.Geochemical Characteristics of Strontium Isotope of the Paleokarst Reservoirs in the Huanglong Formation at the Margin of Southern Daba Mountain[J].Journal of Jilin Unviersity:Earth Science Edition,2009,39(5). | |
| Authors: | WEN Hua-guo ZHENG Rong-cai SHEN Zhong-min ZHANG Bing CAI Jia-lan LUO Ai-jun ZHU Yi-xin |
| Institution: | WEN Hua-guo1,ZHENG Rong-cai1,SHEN Zhong-min1,ZHANG Bing1,CAI Jia-lan2,LUO Ai-jun3,ZHU Yi-xin21.State Key Laboratory of Oil , Gas Reservoir Geology , Exploitation,Chengdu University of Technology,Chengdu 610059,China2.Chongqing Gas District,Southwest Oil , Gas Company of CNPC,Chongqing 400021,China3.Development Corporation of Eastern Sichuan,China |
| Abstract: | Karstic rocks of the Huanglong Formation exposed at the margin of the southern Daba Mountain can be divided into four types: slightly-corroded,moderately-corroded porous,intensely-corroded brecciated and intensely corroded and altered secondary calcic karstic rocks.The strontium isotope compositions of various karstic rocks are analyzed systematically and are compared with the rocks without karst corrosion.It is indicated that during the karst formation process,a positive deviation of 87Sr/86Sr ratio can be... |
| Keywords: | paleokarst reservoirs strontium isotope geochemistry karst fluid Huanglong Formation southern Daba Mountain |
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