Application of Remote Wireless Intelligent Layered Water Injection Technology in Dagang Oilfield

Song, Zu-chang; Liu, Yang; Zhang, Yong-tao; Yang, Ji-jun; Wang, Ying-ying; Li, Min

doi:10.1088/1742-6596/2594/1/012074

Cited by 2 publications

(1 citation statement)

References 8 publications

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“…With the number of subdivided wells and subdivided intervals increasing year by year, the contradiction between the large test workload and the limited test team is increasingly prominent. At the same time, in order to provide continuous and detailed data for the detailed reservoir description, Daqing Oilfield has started the exploratory research of intelligent layered water injection technology since the beginning of this century, mainly including non-contact intelligent injection separation, wave-code communication injection separation, ground intelligent injection separation, and cable-controlled intelligent injection separation, Solved the problems existing in conventional separate injection technology, and realized long-term real-time control of fine, effective and intelligent separate [1][2][3][4][5][6][7][8]. Among them, the cable-controlled intelligent injection separation process has advantages in terms of technical maturity, testing and adjustment efficiency, testing accuracy, and scope of application.…”

Section: Introductionmentioning

confidence: 99%

Daqing Oilfield Cable Controlled Intelligent Separate Injection Technology Process Optimization

Zhang,

Guo,

et al. 2024

J. Phys.: Conf. Ser.

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The cable controlled intelligent separate injection process realizes the continuous monitoring and real-time measurement and adjustment of downhole parameters, greatly improves the measurement and adjustment efficiency, provides sufficient data for reservoir analysis, and helps to tap the potential of remaining oil in the later stage of ultra-high water cut. However, due to the multi-disciplinary application of downhole tools and complex process, it is found in the previous field test that The number of wells with more than two years of operation of cable controlled intelligent separate injection wells accounts for only 51.9%, which can not meet the needs of large-scale application. Through the fault analysis of the early test well, the key factors affecting the success rate of well completion are found. Aiming at the main problems, the flow control valve of the cable controlled intelligent water distributor, the cable sealing connection process and the well flushing valve structure through the cable packer are optimized and improved. The flow control valve of cable controlled intelligent water distributor is opened and closed smoothly under 10MPa pressure difference, and the leakage is less than 1m³/d; The connection between the cable and the cable controlled intelligent water distributor is sealed reliably, and the cable can pass through the upper and lower joints of the cable packer smoothly; Since the optimization of process technology until January 2023, 223 wells have been tested on site, and the number of wells with more than two years of operation has increased from 56.1% to 91.9%. The stability of the optimized cable controlled intelligent separate injection process has been improved, which lays a foundation for the large-scale application of this technology in the oilfield.

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