Wave Equation Simulation of Fluid Pound and Gas Interference

Summary There are nearly 920,000 oil-producing wells worldwide, approximately 87% of which are operated with an artificial-lift method. A rough distribution of these wells shows that 71% use a beam-pumping system, 16% use electrical submersible pumps, 7% use gas lift, and 6% use other forms of lifting systems (Alemi et al. 2011; Liu and Qi. 2011; Ghareeb et al. 2007; Xu et al. 2012). The great majority of the world's oil wells are on artificial lift; therefore, they require large amounts of external electric energy to produce hydrocarbons because the available formation energy is not sufficient to move the well fluids to the surface. On the basis of the 920,000 wells, with 10 kW/hr of consumed power for each well and oil production for 350 days of the year, beam-pumping systems consume approximately 4.77×1010 kW-hr of power per year worldwide. If the power consumption can be decreased by 20% with an energy-saving technique, that alone will help to save 0.95×1010 kW-hr of electricity per year around the world. Therefore, enormous economic benefits will be created by enhancing the system efficiency and reducing the consumption of energy. In this paper, a new comprehensive simulation method of efficiency optimization for a sucker-rod pumping system is presented. Our new method combines a slip model of the surface-transmission system (STS) with a closely coupled model of the downhole rod-string vibration to provide an improved method for calculating the motion of a rod string and the power requirements for a conventional sucker-rod pumping system. The new model proposed in this paper will provide an improved prediction of the power requirements for conventional sucker-rod pumping systems, and the results will be significantly improved as the amount of slip in the STS increases. The new model is verified by comparing it with the available analytical solutions, and good agreement is found. Real application in a high-energy-consumption oil field shows that the new model in this paper will result in significant improvements in system design, especially when the oil wells have a small-diameter pump and high stroke frequency.

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Enhancing Dynagraph Card Classification in Pumping Systems Using Transfer Learning and the Swin Transformer Model

Dong,

Li,

Dong

et al. 2024

Applied Sciences

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The dynagraph card plays a crucial role in evaluating oilfield pumping systems’ performance. Nevertheless, classifying dynagraph cards can be quite difficult because certain operating conditions may exhibit similar patterns. Conventional classification approaches mainly involve labor-intensive manual analysis of these cards, leading to subjectivity, prolonged processing times, and vulnerability to human prejudices. In response to this challenge, our study introduces a novel approach that leverages transfer learning and the Swin Transformer model for classifying dynagraph cards across various operating conditions in rod pumping systems. Initially, the Swin Transformer model undergoes pre-training using the ImageNet-22k dataset. Subsequently, we fine-tune the model’s weights using actual dynagraph card datasets, facilitating direct classification analysis with dynagraph cards as input variables. The adoption of transfer learning significantly reduces the training time while enhancing the accuracy of condition diagnosis. To assess the effectiveness of our proposed method, we conducted a comparative evaluation against conventional models like ResNet50, DenseNet121, LeNet, and ViT. The findings demonstrate that our approach outperforms other methods, achieving an accuracy of 96%, thereby improving classification accuracy by 3–4%. Therefore, our approach, based on transfer learning and the Swin Transformer model, provides a better solution for practical problems involving similar dynagraph cards. It meets the requirements of oil field operations, enhancing economic benefits and work efficiency.

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Wave Equation Simulation of Fluid Pound and Gas Interference

Cited by 4 publications

References 7 publications

The Analysis of Sucker-Rod Pumping Installations

The Analysis of Sucker-Rod Pumping Installations

A New Simulation Model for a Beam-Pumping System Applied in Energy Saving and Resource-Consumption Reduction

Enhancing Dynagraph Card Classification in Pumping Systems Using Transfer Learning and the Swin Transformer Model

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