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Energy Consumption Analysis and Optimization of Electric Submersible Pump System

Engineering（科研） 2023年第5期15卷 269-274页

作者： Lingyu Li Tianjin Branch of CNOOC Ltd. Tianjin China

Electric submersible pumps account for a considerable proportion in the development of the Bohai oilfield. Improving the system efficiency of the electric submersible pump wells, ensuring that the units operate in the high-efficiency zone, is essential. Analysis shows that the efficiency of the electric submersible pump system depends on the wear and tear of each component of the submersible pump equipment, the setting of operational parameters, and more importantly, the production status and daily management level of the oil well. Therefore, improving the structural performance of the submersible pump product, optimizing the parameters setting of the oil well, strengthening daily management, establishing a scientific management system, and improving the production management process and system can effectively improve the production efficiency and economic benefits of the oil well, and further achieve the goal of energy saving and emission reduction. In addition, it is necessary to actively promote the concept and technology of energy saving and emission reduction, encourage oilfield enterprises to explore effective measures to reduce the energy consumption of the electric submersible pump system by strengthening the scientific management system, and achieve a green, low-carbon, and high-quality development of oilfield production to achieve the unity of economic benefits, social benefits, and environmental benefits. This article applies the above measures in the P oilfield to achieve energy optimization of submersible electric pump systems, reducing the daily power consumption of single well submersible electric pump systems by 371 kWh per day, increasing the submersible electric pump's lifespan by 200 days, generating considerable project benefits.

关键词： offshore oil fields Electric Submersible Pumps System Energy Consump-tion System Efficiency Energy Conservation and Consumption Reduction

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Optimization of the Algorithm for Increasing Injection Rate in Water Injection Wells for Pressure Optimization in P oilfield

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World Journal of Engineering and Technology 2023年第2期11卷 246-251页

作者： Lingyu Li Tianjin Branch of CNOOC Ltd. Tianjin China

In today’s society, with the continuous growth of energy demand, Bohai oilfield, as an important offshore oil resource base in China, is facing increasingly severe challenges while contributing to national energy security. In order to improve the quality of water injection in the oilfield and gradually achieve efficient and stable production, Bohai oilfield has launched a water injection well pressure optimization project, focusing on improving the efficiency and quality of water injection in the water injection wells, in order to achieve the optimal water injection plan. In practical work, P oilfield continues to promote the development of water injection well pressure optimization projects, emphasizing practical exploration and continuous optimization of work plans. However, during the project implementation process, there were some problems, one of which was that the statistics of cumulative injection volume were not scientific enough, resulting in a more comprehensive and accurate presentation of the actual results of pressure optimization work. In the context of continuous improvement work, after careful analysis and research, P oilfield has decided to optimize the cumulative injection rate algorithm to guide the oilfield’s water injection work in a more refined way, ensuring sufficient and good water injection, and enhancing the oilfield’s production efficiency and comprehensive competitiveness.

关键词： offshore oil fields Water Injection Wells Pressure Optimization Water Injection Volume Calculation Method

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Utilizing Dynamic Data to Quickly Evaluate Advantageous Channels and Applications

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World Journal of Engineering and Technology 2023年第3期11卷 417-423页

作者： Jianguo Liu Rui Zhang Zheng Lv Meinan Wang Guohao Zhang Tianjin Branch of CNOOC Ltd. Tianjin China

In response to the high cost and difficulty of high-speed development and testing data in offshore oil fields, this paper proposes to use the most easily available production performance data as the basis and use the grey correlation method to calculate the correlation coefficient between oil and water wells to characterize the degree of development of advantageous channels. The consistency between the calculated results of this method and the tracer test results is over 80%. Based on the fitting results, the correlation coefficient exceeds 0.74 to determine the existence of an advantageous channel. According to the research results of grey correlation method, Bohai K oilfield has completed the combined profile control and flooding measures, and the daily oil production has increased by 20 m3/d. This method is simple, fast, and can achieve quantitative evaluation, which saves time and investment compared to offshore testing. It has strong application and reference value for the development of other offshore water injection oilfields.

关键词： offshore oil fields Production Performance Correlation Coefficient Advantageous Channel Quantitative Assessment

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