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从地壳密度结构看中国大陆深层油气盆地的分布
投稿时间:2018-07-15  修订日期:2018-09-29  点此下载全文
引用本文:杨文采,于常青,杨午阳.2018.从地壳密度结构看中国大陆深层油气盆地的分布[J].地质论评,64(6):1315-1323,[DOI]:.
YANG Wencai,YU Changqing,YANG Wuyang.2018.Distribution of Deep Oil/Gas Sedimentary Basins of China[J].Geological Review,64(6):1315-1323.
DOI:
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作者单位E-mail
杨文采 1) 浙江大学地球科学学院, 杭州, 310027 yangwencai@cashq.ac.cn 
于常青 2) 中国地质科学院地质研究所, 北京, 100037  
杨午阳 3) 中石油勘探开发研究院西北分院兰州710000 yang007@zju.edu.cn 
基金项目:本文为国家自然科学基金资助项目(编号: 41574111)的成果。
中文摘要:面对21世纪的中国能源问题,要研究深埋在5km以下的古生代沉积盆地和潜在油气储层。由于结晶基底密度大、磁性较强,盆地沉积岩密度低而磁性弱,可用密度成像及磁性体顶面深度反演来确定深埋沉积盆地和潜在储层的分布范围。应用重力异常多尺度分析和密度成像方法,可以计算出反映中国深埋沉积盆地和潜在储层分布的密度扰动图,预测中国深埋盆地的分布。密度成像的低密度扰动区与磁性结晶基底顶面深度大的区域吻合,与反射地震剖面探测结果一致。通过密度扰动成像预测深埋沉积盆地主要分布在中国西部的塔里木、柴达木、四川、准噶尔和鄂尔多斯等盆地深层。东部岩石圈裂谷带也可形成深埋结晶基底裂隙型储层, 分布在华北和东北下方。中国深埋沉积盆地和潜在储层的总面积可达地面沉积盆地面积的45%左右,估计陆上面积1600000km2左右,海域面积600000km2左右,具有广阔的天然气勘探前景。
中文关键词:深埋盆地  潜在储层  分布预测  中国  密度成像  多尺度分析  天然气勘探
 
Distribution of Deep Oil/Gas Sedimentary Basins of China
NameInstitution
YANG Wencai1) College of Geosciences, Zhejiang University, Hangzhou, 310027
YU Changqing2) Institute of Geology,Chinese Academy of Geological Science, Beijing, 100037
YANG Wuyang3) Northwest Section of Petroleum Exploration and Production, PETROCHINA, Liangzhou 730000
Abstract:Facing the energy problem today, we study the deeply buried sedimentary basins and potential reservoirs beneath the surface at least 5km in China. As density and magnetic properties of sediments are usually different from that of the crystalline basement, we apply the methods of density disturbance imaging and inversion techniques to determine location of deep sedimentary basins and potential reservoirs. The wavelet multi-scale analysis and density inversion method are used for imaging, yielding density disturbance maps at different depths in the crust, one of which is corresponding to depth between 5-9 km and can be used for locating the deeply buried basins and potential reservoirs. The results are coincide with inversion of top-depth maps of the crystalline basement produced by inversion of magnetic data and reflection seismic profiles. The density disturbance maps show that the deeply buried basins and potential reservoirs mainly distribute in Tarim, Tsaidam, Sichuan, Junggar, Odors basins and South China Sea, as well as along the rift zones in East China, whose crystalline rocks contain many cricks created by the rifting process. The potential area of the deeply buried basins may reach 1.6 million km2on land and 0.6 million km2in the marginal seas, demonstrating good prospects for gas/oil exploration.
keywords:deeply buried basins  potential reservoirs  China  density imaging  wavelet multi-scale analysis  oil/gas exploration
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