A Deep-Learning-Based Oil-Well-Testing Stage Interpretation Model Integrating Multi-Feature Extraction Methods

Xin Feng, Qiang Feng, Shaohui Li, Xingwei Hou and Shugui Liu
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Xin Feng: State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China
Qiang Feng: CNPC Bohai Drilling Engineering Company Ltd., Tianjin 300457, China
Shaohui Li: Tianjin Research Institute of Water Transport Engineering, Tianjin 300000, China
Xingwei Hou: State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China
Shugui Liu: State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China

Energies, 2020, vol. 13, issue 8, 1-18

Abstract: The interpretation of well-testing data is a key means of decision-making support for oil and gas field development. However, conventional processing methods have many problems, such as the stochastic nature of the data, feature redundancies, the randomness of the initial weights or thresholds, and fluctuations in the generalization ability with slight changes in the network parameters. These result in a poor ability to characterize data features and a low generalization ability of the interpretation models. We propose a new integrated well-testing interpretation model based on a multi-feature extraction method and deep mutual information classifiers (MFE-DMIC). This model can avoid the low model classification accuracy caused by the simple training structures, lacking of redundancy elimination, and the non-optimal classifier configuration parameters. First, we obtained the initial features according to four classical feature extraction methods. Then, we eliminated feature redundancies using a deep belief network and united the maximum information coefficient method to achieve feature purification. Finally, we calculated the interpretation results using a hybrid particle swarm optimization–support vector machine classification system. We used 572 well-testing field samples, including five working stages, for model training and testing. The results show that the MFE-DMIC model had the highest total stage classification accuracy of 98.18% as well as the least of features (nine) compared with the classical feature extraction and classification methods and their combinations. The proposed model can reduce the efforts of oil analysts and allow accurate labeling of samples to be predicted.

Keywords: data interpretation; well testing; integrated interpretation model; deep belief network (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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