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Frontiers of Engineering Management

Front. Eng    2019, Vol. 6 Issue (4) : 517-523
Practice and understanding of developing new technologies and equipment for green and low-carbon production of oilfields
He LIU(), Jianwen YAN, Siwei MENG, Qinghai YANG, Zixiu YAO, Shijia ZHU
Research Institute of Petroleum Exploration & Development, Beijing 100083, China
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The core of China’s low-carbon development includes optimization of industrial structure, clean energy technologies, emission reduction technologies, and innovation of relevant systems and institutions. China National Petroleum Corporation (CNPC) has always been a proactive participant in developing low-carbon economy, shouldering the responsibilities of safeguarding oil and gas supply, conserving energy, and reducing emission. Therefore, CNPC fulfills those responsibilities as a substantial part of its overall strategy. Guided by low carbon and driven by innovation, petroleum corporations have taken constant innovation of low-carbon technologies, especially the development of green and low-carbon petroleum engineering technologies and equipment, as major measures for energy conservation and emission reduction. Large-scale development mode of unconventional resource anhydrous fracturing should be innovated. And supercritical CO2 should be used to replace water for fracturing operation, in order to achieve multiple objectives of CO2 burying, conserve water resource, improve single well production and ultimate recovery, realizing reduced emission and efficient utilization of CO2 resources. Artificial lifting energy-saving and efficiency-increasing technologies and injection-production technology in the same well should also be innovated. Energy consumption of high water-cut wells is reduced to support the new low-carbon operation mode of high water-cut oilfields and realize energy saving and efficiency improvement during oil production by developing the operation efficiency of the lifting system and reducing the ineffective lifting of formation water. These technologies have been widely recognized by local and international experts and have greatly enhanced CNPC’s international influence. This study expounds the key technologies and equipment with regard to the development of green and low-carbon petroleum engineering and provide relevant suggestions.

Keywords low carbon      energy conservation and emission reduction      petroleum engineering technology      petroleum equipment     
Corresponding Author(s): He LIU   
Just Accepted Date: 16 October 2019   Online First Date: 26 November 2019    Issue Date: 05 December 2019
 Cite this article:   
He LIU,Jianwen YAN,Siwei MENG, et al. Practice and understanding of developing new technologies and equipment for green and low-carbon production of oilfields[J]. Front. Eng, 2019, 6(4): 517-523.
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Jianwen YAN
Siwei MENG
Qinghai YANG
Zixiu YAO
Shijia ZHU
Fig.1  Schematic of ground equipment for CO2 waterless fracturing.
Fracturing technology Number of wells Average amount of fracturing fluid (m3) Average daily oil production after fracturing (m3) Average daily oil production /1000 m3 of fracturing fluid (m3)
CO2 waterless fracturing 8 630 2.4 3.81
Conventional water-based fracturing 23 380 0.6 1.58
Tab.1  Comparison of operation scale and oil production between CO2 waterless fracturing and conventional water-based fracturing.
Fig.2  Submersible reciprocating pump and progressive cavity pump driven by permanent magnet synchronous motor.
Fig.3  Comparison of separation efficiency between conventional and cubic curve hydrocyclones.
Test well Production technology Liquid production
Oil production (m3/d) Water production (m3/d) Water-oil ratio (%)
La 3-3616 Conventional production 145 2.77 142.23 51.35
Injection-production technology in the same well 37 2.75 34.25 12.45
Fang 6-1 Conventional production 128 3.21 124.79 38.88
Injection-production technology in the same well 32 3.20 28.80 9.00
Fang 4-1.2 Conventional production 131 2.49 128.51 51.61
Injection-production technology in the same well 36 2.48 33.52 13.52
Gao 124-44 Conventional production 161 1.38 159.62 115.67
Injection-production technology in the same well 41 1.38 39.62 28.71
Bei 2-6-40 Conventional production 39 1.17 37.83 32.33
Injection-production technology in the same well 8.7 1.2 7.5 6.25
Tab.2  Water and oil production changes with injection-production technology in the same well for 5 of the 20 test wells.
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