Prediction of Reservoir Parameters of Machine Learning Based on Fuzzy Rough Set
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摘要: 因为地震数据的三维空间分布优势,地震属性已经被广泛应用于含油气性预测、储层厚度预测、孔隙度预测等。但也存在地震属性之间信息冗余、属性与储层物性参数关系模糊的问题。针对这两个问题,将模糊粗糙理论和机器学习引入到储层参数预测中来。通过模糊粗糙集理论对地震属性进行约简,去除冗余信息,得到最优化的地震属性组合;将约简后的属性作为机器学习的输入,实现从地震属性到储层物性参数的非线性映射。该方法既保留了地震属性中有效信息,又避免了因输入变量过多而导致的网络模型训练困难。实际数据应用表明,属性约简的机器学习预测结果分辨率更高,并与数据吻合更好。Abstract: Due to the advantages of seismic data distribution in three-dimensional spatial, seismic attributes have been widely used in prediction of oil and gas, reservoir thickness and porosity. However, there are some problems like information redundancy between seismic attributes and the fuzzy relationship between seismic attributes and reservoir property parameters. Aiming at these two problems, fuzzy rough theory and machine learning are introduced into reservoir parameter prediction. By using the fuzzy rough set theory to reduce the seismic attributes, the redundant information is removed and the optimized seismic attribute combination is obtained. Then the attributes of reduction are used as input of machine learning to implemented the nonlinear mapping from seismic attribute to reservoir parameter. This method not only preserves the effective information of seismic attributes, but also avoids the difficulty of training the network model caused by too many input variables. The practical application shows that the machine learning prediction results with attribute reduction are in better agreement with the well data and have better resolution.
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Keywords:
- machine learning /
- fuzzy rough set /
- reservoir parameter prediction
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