[1]LI Kewen,DU Congcong,HUANG Zongchao,et al.Early warning model for abnormal workingconditions of CBiA-PSL pumping wells[J].CAAI Transactions on Intelligent Systems,2022,17(2):295-302.[doi:10.11992/tis.202106007]
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CAAI Transactions on Intelligent Systems[ISSN 1673-4785/CN 23-1538/TP] Volume:
17
Number of periods:
2022 2
Page number:
295-302
Column:
学术论文—机器感知与模式识别
Public date:
2022-03-05
- Title:
-
Early warning model for abnormal workingconditions of CBiA-PSL pumping wells
- Author(s):
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LI Kewen; DU Congcong; HUANG Zongchao; LI Xiao; KE Cuihong
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College of Computer Science and Technology, China University of Petroleum, Qingdao 266580, China
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- Keywords:
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convolutional neural network; bidirectional gated recurrent unit; attention; positive sharing loss; loss function; identification of abnormal working conditions; working condition diagnosis and early warning; data imbalance
- CLC:
-
TP18
- DOI:
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10.11992/tis.202106007
- Abstract:
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In the process of oilfield production, which is affected by various factors, oil wells are prone to abnormal working conditions, such as pump and pipe leakages, which will reduce the output of oil wells and even lead to lying in wells. Early warning of abnormal working conditions is an important task of intelligent oilfield management. Based on the convolutional neural network–bidirectional gated recurrent unit (CNN–BiGRU) joint network, an improved network structure CNN–BiGRU attention-positive sharing loss (CBiA-PSL) model is proposed for early warning of abnormal oil well conditions. The model uses the CNN to learn the depth features of the gray image of the sample, BiGRU to effectively prevent information loss and strengthen the connection between the features of the CNN pool layer, and attention mechanism to weigh the hidden state to complete effective feature screening. To address the imbalance of the working condition dataset, a PSL function, which divides the abnormal data (positive class) into subclasses, is proposed. Each subclass shares the loss of the entire positive class and provides a high weight to the positive class with only a few samples. The experimental results show that the CBiA-PSL model has a better prediction effect and a higher accuracy for anomaly and overall prediction than other models.