| 川东北地区飞仙关组白云岩成岩作用与系统划分 |
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| 引用本文： | 郑荣才,党录瑞,文华国,陈章文,陈方敏,张海杰.川东北地区飞仙关组白云岩成岩作用与系统划分[J].地球科学,2011(4). |
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| 作者姓名： | 郑荣才 党录瑞 文华国 陈章文 陈方敏 张海杰 |
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| 作者单位： | 成都理工大学油气藏地质及开发工程国家重点实验室;中国石油西南油气田分公司重庆气矿; |
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| 基金项目： | 国家自然科学基金项目(Nos.40672073,41002033) |
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| 摘 要： | 通过对川东北地区下三叠统飞仙关组白云岩的结构-成因分类、成岩作用方式、成岩演化序列和铁、锰、锶微量元素,碳、氧、锶稳定同位素地球化学特征的综合研究,从盆地大尺度的成岩作用组合特征出发,按水文体制将飞仙关组白云岩划分为4个成岩系统:(1)准同生阶段孔隙卤水成岩系统;(2)早-中成岩阶段地层压实热卤水成岩系统;(3)晚成岩阶段混合热卤水成岩系统;(4)构造隆升阶段油田热卤水成岩系统.各阶段成岩系统白云化流体性质和来源具有一定的亲缘性和继承性发展演化特点,但水-岩相互作用过程、成岩方式、产物和组合特征各不相同,与储层发育密切相关的成岩方式主要是各成岩系统中的多期次埋藏白云化和溶蚀作用.根据各成岩系统中成岩作用与储层在时间-空间上的耦合与匹配关系,可将优质白云岩储层和油气藏控制因素归结为3点:(1)早-中成岩阶段埋藏白云化为储层发育基础;(2)晚成岩阶段埋藏白云化扩大,提高了储层分布范围与质量;(3)构造隆升阶段破裂、TSR和溶蚀作用是形成飞仙关组高效气藏的关键.
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| 关 键 词： | 白云岩储层 成岩作用 地球化学 成岩流体 成岩系统. |
Diagenesis Characteristics and System for Dolostone in Feixianguan Formation of Northeast Sichuan |
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| ZHENG Rong-cai,DANG Lu-rui,WEN Hua-guo,CHEN Zhang-wen,CHEN Fang-min,ZHANG Hai-jie.State Key Laboratory of Oil , Gas Reservoir Geology , Exploitation,Chengdu University of Technology,Chengdu ,China.Chongqing Gas District of Southwest Oil , Gas Company of CNPC,Chongqing ,China.Diagenesis Characteristics and System for Dolostone in Feixianguan Formation of Northeast Sichuan[J].Earth Science-Journal of China University of Geosciences,2011(4). |
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| Authors: | ZHENG Rong-cai DANG Lu-rui WEN Hua-guo CHEN Zhang-wen CHEN Fang-min ZHANG Hai-jieState Key Laboratory of Oil Gas Reservoir Geology Exploitation Chengdu University of Technology Chengdu ChinaChongqing Gas District of Southwest Oil Gas Company of CNPC Chongqing China |
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| Institution: | ZHENG Rong-cai1,DANG Lu-rui2,WEN Hua-guo1,CHEN Zhang-wen2,CHEN Fang-min2,ZHANG Hai-jie21.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology,Chengdu 610059,China2.Chongqing Gas District of Southwest Oil and Gas Company of CNPC,Chongqing 400021,China |
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| Abstract: | Through the comprehensive study of the texture-genetic classification,diagenetic manners and evolution stages,trace element characteristics of Fe,Mn,Sr,and isotopic geochemistry characteristics of C,O and Sr of Feixianguan Formation,Lower Triassic in Northeast Sichuan,four diagenetic systems were divided in the dolostone of Feixianguan Formation according to hydrological system,which were pore brine of the penecontemporaneous stage,compaction hot brine of the early and middle diagenetic stages.The character... |
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| Keywords: | dolomite reservoirs diagenesis geochemistry dolomitization fluid diagenesis system |
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