| 叠前宽角度反演方法在周返地区盐湖盆地储层预测中的应用 |
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| 引用本文： | 李忠平,何又雄,李梅,郝亚炬,黄捍东,沈金松.叠前宽角度反演方法在周返地区盐湖盆地储层预测中的应用[J].CT理论与应用研究,2018,27(3):329-338. |
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| 作者姓名： | 李忠平 何又雄 李梅 郝亚炬 黄捍东 沈金松 |
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| 作者单位： | 1. 中国石化江汉油田分公司物探研究院, 武汉 430000; |
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| 基金项目： | 国家自然科学基金(41674139) |
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| 摘 要： | 周返地区盐湖盆地发育复杂的盐韵律地层，储层密度可以对该区砂岩储层进行识别，但该区砂岩储层与非储层之间密度差异小，传统基于Aki-Richards近似公式的叠前密度反演结果精度低，无法满足对该区储层预测的要求。本文将精确Zoeppritz方程直接代入广义线性反演误差泛函，推导新的宽角度叠前反演公式，以克服近似公式对大角度叠前地震信号无法正确利用的缺点，进而提高反演结果的精度。对合成地震数据和工区实际数据的反演结果表明，该方法对密度反演结果的精度明显优于近似公式，满足周返地区盐湖盆地岩性油藏的高精度预测。
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| 关 键 词： | 叠前宽角度反演 密度反演 精确Zoeppritz方程 周返地区 |
| 收稿时间： | 2017-12-16 |
The Application of Pre-stack Wide-angle Inversion Method to Reservoir Prediction in Zhoufan Salt Basin |
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| LI Zhong-ping,HE You-xiong,LI Mei,HAO Ya-ju,HUANG Han-dong,SHEN Jin-song.The Application of Pre-stack Wide-angle Inversion Method to Reservoir Prediction in Zhoufan Salt Basin[J].Computerized Tomography Theory and Applications,2018,27(3):329-338. |
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| Authors: | LI Zhong-ping HE You-xiong LI Mei HAO Ya-ju HUANG Han-dong SHEN Jin-song |
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| Affiliation: | 1. Geophysical Research Institute of Jianghan Oilfield Company, Sinopec, Wuhan 430000, China;2. a). Unconventional Gas research Institute;b). Faculty of Geophysics and Informatics, China University of Petroleum-Beijing, Beijing 102249, China |
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| Abstract: | Zhoufan Salt Basin develops complex salt rhythmic strata. Density should identify the sand reservoir in this area. Unfortunately, the density difference between sand and other lithology is very small, which causes the traditional pre-stack inversion method that based on Aki-Richards equation cannot satisfy the reservoir prediction task. We substitute the Zoeppritz equation into general inversion frame and then deduct prestack wide-angle inversion formula. Our inversion formula overcomes the weakness of Aki-Richards equation which cannot apply the wide angle information accurately. In this case, the inversion accuracy is improved. The synthetic test and field data application illustrate that our density inversion result is more accurate than the traditional one and satisfy the reservoir prediction in Zhoufan Salt Basin. |
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