| 中国南海北部珠江口-琼东南盆地钻井岩屑地球化学特征及深水区天然气聚集特征 |
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| 引用本文： | 高岗,张功成,陈果,刚文哲,沈怀磊,赵科.中国南海北部珠江口-琼东南盆地钻井岩屑地球化学特征及深水区天然气聚集特征[J].海洋学报(英文版),2018,37(2):44-53. |
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| 作者姓名： | 高岗 张功成 陈果 刚文哲 沈怀磊 赵科 |
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| 作者单位： | 油气资源与探测国家重点实验室, 中国石油大学(北京), 北京 102249, 中国,研究院, 中国海洋石油总公司, 北京 100020, 中国,油气资源与探测国家重点实验室, 中国石油大学(北京), 北京 102249, 中国,油气资源与探测国家重点实验室, 中国石油大学(北京), 北京 102249, 中国,研究院, 中国海洋石油总公司, 北京 100020, 中国,华北油田地球物理勘探研究所, 任丘 062552, 中国 |
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| 基金项目： | The National Key Science and Technology Special Project (13th Five Year Plan) of the Key Technology of Gas and Oil Exploration in Offshore Deep Water Area (Phase 3) under contract No. 2016Zx05026. |
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| 摘 要： | The Qiongdongnan Basin and Zhujiang River(Pearl River) Mouth Basin, important petroliferous basins in the northern South China Sea, contain abundant oil and gas resource. In this study, on basis of discussing impact of oil-base mud on TOC content and Rock-Eval parameters of cutting shale samples, the authors did comprehensive analysis of source rock quality, thermal evolution and control effect of source rock in gas accumulation of the Qiongdongnan and the Zhujiang River Mouth Basins. The contrast analysis of TOC contents and Rock-Eval parameters before and after extraction for cutting shale samples indicates that except for a weaker impact on Rock-Eval parameter S_2, oil-base mud has certain impact on Rock-Eval S_1, Tmax and TOC contents. When concerning oil-base mud influence on source rock geochemistry parameters, the shales in the Yacheng/Enping,Lingshui/Zhuhai and Sanya/Zhuhai Formations have mainly Type Ⅱ and Ⅲ organic matter with better gas potential and oil potential. The thermal evolution analysis suggests that the depth interval of the oil window is between 3 000 m and 5 000 m. Source rocks in the deepwater area have generated abundant gas mainly due to the late stage of the oil window and the high-supper mature stage. Gas reservoir formation condition analysis made clear that the source rock is the primary factor and fault is a necessary condition for gas accumulation. Spatial coupling of source, fault and reservoir is essential for gas accumulation and the inside of hydrocarbon-generating sag is future potential gas exploration area.
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| 关 键 词： | 岩屑 有机地球化学 天然气聚集 深水区 琼东南盆地 珠江口盆地 |
| 收稿时间： | 2016/10/4 0:00:00 |
| 修稿时间： | 2011/5/25 0:00:00 |
Geochemistry of borehole cutting shale and natural gas accumulation in the deepwater area of the Zhujiang River Mouth-Qiongdongnan Basin in the northern South China Sea |
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| GAO Gang,ZHANG Gongcheng,CHEN Guo,GANG Wenzhe,SHEN Huailei and ZHAO Ke.Geochemistry of borehole cutting shale and natural gas accumulation in the deepwater area of the Zhujiang River Mouth-Qiongdongnan Basin in the northern South China Sea[J].Acta Oceanologica Sinica,2018,37(2):44-53. |
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| Authors: | GAO Gang ZHANG Gongcheng CHEN Guo GANG Wenzhe SHEN Huailei and ZHAO Ke |
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| Institution: | 1.State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum (Beijing), Beijing 102249, China2.Research Institute, CNOOC, Beijing 100020, China3.Geophysical Exploration Research Institute of Huabei Oilfield Company, Renqiu 062552, China |
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| Abstract: | The Qiongdongnan Basin and Zhujiang River (Pearl River) Mouth Basin, important petroliferous basins in the northern South China Sea, contain abundant oil and gas resource. In this study, on basis of discussing impact of oil-base mud on TOC content and Rock-Eval parameters of cutting shale samples, the authors did comprehensive analysis of source rock quality, thermal evolution and control effect of source rock in gas accumulation of the Qiongdongnan and the Zhujiang River Mouth Basins. The contrast analysis of TOC contents and Rock-Eval parameters before and after extraction for cutting shale samples indicates that except for a weaker impact on Rock-Eval parameter S2, oil-base mud has certain impact on Rock-Eval S1, Tmax and TOC contents. When concerning oil-base mud influence on source rock geochemistry parameters, the shales in the Yacheng/Enping, Lingshui/Zhuhai and Sanya/Zhuhai Formations have mainly Type II and III organic matter with better gas potential and oil potential. The thermal evolution analysis suggests that the depth interval of the oil window is between 3 000 m and 5 000 m. Source rocks in the deepwater area have generated abundant gas mainly due to the late stage of the oil window and the high-supper mature stage. Gas reservoir formation condition analysis made clear that the source rock is the primary factor and fault is a necessary condition for gas accumulation. Spatial coupling of source, fault and reservoir is essential for gas accumulation and the inside of hydrocarbon-generating sag is future potential gas exploration area. |
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| Keywords: | cutting shale organic geochemistry gas accumulation deepwater area Qiongdongnan Basin Zhujiang River Mouth Basin |
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