| 琼东南盆地现今地层温度分布特征及油气地质意义 |
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| 引用本文： | 甘军,吴迪,张迎朝,刘绍文,郭明刚,李香兰,朱继田,熊小峰,王辉,尹宏伟.琼东南盆地现今地层温度分布特征及油气地质意义[J].高校地质学报,2019,25(6):952. |
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| 作者姓名： | 甘军 吴迪 张迎朝 刘绍文 郭明刚 李香兰 朱继田 熊小峰 王辉 尹宏伟 |
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| 作者单位： | 中海石油(中国)有限公司湛江分公司,南海西部石油研究院,湛江524057;海岸与海岛开发教育部重点实验室,南京大学地理与海洋科学学院,南京210023;海岸与海岛开发教育部重点实验室,南京大学地理与海洋科学学院,南京210023;中国南海研究协同创新中心,南京210023;南京大学地球科学与工程学院,南京210023 |
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| 基金项目： | 油气专项;国家级大学生创新创业训练计划项目 |
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| 摘 要： | 温度状态是决定油气形成与保存的关键因素，精准的深部地层温度预测对盆地油气资源战略评价和勘探开发具有重要意义。琼东南盆地是我国当前深水油气资源勘探的重点区块，揭示盆地深部地层温度分布格局及主控因素是深水油气勘探研究的一项基础工作。结合钻孔实测温度和系统的岩石热物性参数，文章揭示了琼东南盆地现今深部地层温度分布特征。研究表明，琼东南盆地的优势储层温度为90~150℃ （数据占比>70%），高于国外学者提出的储层“黄金温度带”（60~120℃），推测与南海北部大陆边缘盆地高地热背景有关。此外，盆地T30—T70 界面处的估算温度均表现为“西高东低”的特征，高温区域位于西部的崖南凹陷；深部温度分布格局与地层的埋深、热导率结构以及因区域拉张程度不同引起的基底热流差异等诸因素有关。成果为琼东南深水油气勘探开发及钻井工艺设计提供了坚实的地热学依据。
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| 关 键 词： | 储层温度 生油窗 黄金温度带 琼东南盆地 南海 |
| 收稿时间： | 2019-06-04 |
Distribution Pattern of Present-day Formation Temperature in the Qiongdongnan Basin: Implications for Hydrocarbon Generation and Preservation |
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| GAN Jun,WU Di,ZHANG Yingchao,LIU Shaowen,GUO Minggang,LI Xianglan,ZHU Jitian,XIONG Xiaofeng,WANG Hui,YIN Hongwei.Distribution Pattern of Present-day Formation Temperature in the Qiongdongnan Basin: Implications for Hydrocarbon Generation and Preservation[J].Geological Journal of China Universities,2019,25(6):952. |
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| Authors: | GAN Jun WU Di ZHANG Yingchao LIU Shaowen GUO Minggang LI Xianglan ZHU Jitian XIONG Xiaofeng WANG Hui YIN Hongwei |
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| Institution: | 1. CNOOC (China) Co., Ltd. Zhanjiang Branch, Zhanjiang 524057, China;
2. Key Laboratory of Coast and Island Development, MOE; School of Geographic and Oceanographic Sciences,;
Nanjing University, Nanjing 210023, China;
3. Collaborative Innovation Center for South China Sea Studies, Nanjing 210023, China;
4 . School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China |
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| Abstract: | Temperature is a key factor that controls the generation and perseveration of hydrocarbon, and accurate determination of deep formation temperature is of great significance for hydrocarbon resource assessment of sedimentary basins. The Qiongdongnan Basin, located at the northern margin of the South China Sea, is the ongoing target for deepwater hydrocarbon exploration in China, so understanding the spatial pattern of the deep formation temperature for this basin is fundamental for deepwater exploration in this area.On the basis of measured borehole temperatures and estimation of deep temperature with systematic dataset of thermal properties, the distribution patterns of the deep temperatures for the T30-T70 were presented here. The results demonstrated that the dominative range of measured reservoir temperatures of the basin is 90 to 150℃ , higher than the recently proposed golden temperature zone (60 to 120℃), which is partially due to the high thermal background of the Qiongdongnan Basin. In addition, the spatial patterns of the deep temperatures for the T30-T70 formations are characterized by high in the western basin and lower in the eastern basin, and the high temperature anomaly is found in the Yanan Depression, as a result of differential burial depth, thermal conductivity and basal heat flow associated with regional crustal extension within the basin. The results would provide robust geothermal constraints on the hydrocarbon exploration and drilling safe design for this basin. |
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| Keywords: | reservoir temperature oil window golden temperature zone Qiongdongnan Basin South China Sea |
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