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| 南海北部边缘盆地天然气成因类型及成藏时间综合判识与确定 | |
| 引用本文： | 何家雄,马文宏,祝有海,龚晓峰.南海北部边缘盆地天然气成因类型及成藏时间综合判识与确定[J].中国地质,2011,38(1):145-160. |
| 作者姓名： | 何家雄 马文宏 祝有海 龚晓峰 |
| 作者单位： | 1. 中国科学院边缘海地质重点实验室,广东广州,510640 2. 中海石油有限公司湛江分公司勘探开发部,广东,湛江,5240572 3. 中国地质科学院矿产资源研究所,北京,100037 |
| 基金项目： | 国家自然科学基金，国家重点基础研究发展计划项目 |
| 摘 要： | 20世纪90年代以来,南海北部边缘盆地天然气勘探进展迅速,除早期在琼东南盆地发现YC13-1气田以外,陆续在莺歌海盆地发现了DF气田群和LD气田群,在珠江口盆地发现了WC气田群及PY气田群,近期在珠江口盆地南部深水区则发现了LW-LH气田群。这些气田群气藏天然气组成,主要以烃类气为主,但莺歌海盆地气田群部分区块及层段亦含有丰富的CO2(二氧化碳)和N2(氮气)等非烃气。根据天然气地质地球化学特征,借鉴国内外通用判识划分方法及指标,该区烃类气可综合判识与划分为生物气及亚生物气、成熟油型气、成熟-高熟煤型气及高熟-过熟气等成因类型;该区非烃气CO2可划分为壳源型(有机/无机)、壳幔混合型及火山幔源型等三大成因类型。非烃气N2则可划分为大气成因、壳源型有机成因和壳源型有机-无机混合成因等3种主要成因类型。对于不同气藏烃类气形成及成藏时间判识与厘定,主要依据其地球化学特征及生烃动力学、同位素动力学模拟实验和含烃盐水包裹体及自生伊利石Ar-Ar同位素定年,并结合具体成藏地质条件分析而综合判识与确定;对于非烃气形成及成藏时间,则主要根据伴生烃类气形成时间,并结合温压双控热模实验结果及地质条件综合判识与确定。 |
| 关 键 词： | 南海北部 烃类气成因类型 非烃气成因类型 温压双控热模拟 形成时间判识 |
Integrated identification and determination of genetic types and accumulation time in the marginal basin of northern South China Sea |
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| HE Jia-xiong,MA Wen-hong,ZHU You-hai,Gong Xiao-feng.Integrated identification and determination of genetic types and accumulation time in the marginal basin of northern South China Sea[J].Chinese Geology,2011,38(1):145-160. | |
| Authors: | HE Jia-xiong MA Wen-hong ZHU You-hai Gong Xiao-feng |
| Institution: | HE Jia-xiong1,MA Wen-hong2,ZHU You-hai3,Gong Xiao-feng1(1.Key Laboratory of Marginal Sea Geology,CAS,Guangzhou 510640,Guangdong,China,2.Zhanjiang Branch,CNOOC,Zhanjiang 524057,3.Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037,China) |
| Abstract: | Gas exploration has made rapid progress in the marginal basin of northern South China Sea since the 1990's.In addition to YC13-1 gas field found in the early stage in Qiongdongnan basin,DF gas field belt and LD gas field belt were found in succession in Yinggehai basin,WC gas field belt and PY gas field belt were found in Zhujiangkou basin,and LW-LH gas field belt was found recently in deep water area of Zhujiangkou basin.The gas composition of these gas field belts is mainly hydrocarbons,with some blocks o... |
| Keywords: | northern South China Sea genetic types of hydrocarbon gas genetic types of non-hydrocarbon gas double controlling factors of temperature and pressure in thermal simulation determination of accumulation time |
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