| 地震模型正演在盐下构造中的应用 |
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| 引用本文： | 李志祥.地震模型正演在盐下构造中的应用[J].海洋地质动态,2014,30(8):55-59. |
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| 作者姓名： | 李志祥 |
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| 作者单位： | 中国石化集团江汉油田勘探开发研究院,武汉430223 |
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| 摘 要： | 加蓬盆地是西非海岸盆地之一，自晚侏罗世开始成盆，下白垩统埃詹加组是一套膏盐层，局部发育多个巨厚盐丘，厚度从30～4000m不等。由于盐丘与围岩之间存在很大的速度差异，造成盐下甘巴组目的层地震反射在盐丘部位出现异常。通过地震模型正演技术对盐下地层构造形态进行了分析，研究表明，无论盐丘大小如何，盐丘都会使盐下地层产生“下拉”现象。
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| 关 键 词： | 盐丘 盐下构造 地震模型正演 |
APPLICATION OF SEISMIC FORWARD MODELING IN PRESALT STRUCTURES |
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| LI Zhixiang.APPLICATION OF SEISMIC FORWARD MODELING IN PRESALT STRUCTURES[J].Marine Geology Development,2014,30(8):55-59. |
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| Authors: | LI Zhixiang |
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| Institution: | LI Zhixiang (Research Institute of Exploration and Development, SINOPEC Jianghan Oilfield Company, Wuhan 430223, China) |
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| Abstract: | The Gabon Basin is one of offshore basins in West Africa. The basin began to form in late Jurassic. The Lower Cretaceous Ezanga Formation is composed of gypsum, in which several salt domes with 30~400 m in thickness are locally developed. Because of great velocity difference between salt dome and its host rock, seismic reflection of the Presalt Gamba Formation is abnormal at the salt dome. This paper analyses the Presalt structural features by means of seismic forward modeling. The study shows that no matter the salt dome is big or small, salt dome can produce ＂pull-down＂ phenom- ena in the Presalt. |
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| Keywords: | salt dome presalt structure seismic forward modeling |
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