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    Your Position :Home->Past Journals Catalog->2025 Vol.1

    Study on water flooding pattern and potential tapping strategy during ultra-high water-cut period in Bohai S oil field
    Author of the article:DENG Jingfu, ZHANG Junting, WU Xiaohui, FU Yongheng, ZHANG Lie
    Author's Workplace:CNOOC China Ltd., Tianjin Branch, Tianjin, 300459, China
    Key Words:Ultra-high water-cut period; Water-flooded pattern; Remaining oil enrichment pattern; Horizontal well
    Abstract:

    As the oilfield enters the ultra-high water cut period, the proportion of water flooding is increasing, the remaining oil is more dispersed, and the difficulty of tapping potential is increasing. Therefore, it is of great significance to study the water flooding law and tapping potential strategy in the ultra-high water cut period for the stable production and subsequent development of the oilfield. Based on the new drilling adjustment wells, logging and production dynamic monitoring data of S oilfield in the ultra-high water cut period, the plane and vertical water flooding types and characteristics of the oilfield in the ultra-high water cut period are analyzed, and the remaining oil enrichment mode is summarized. The results show that the corresponding relationship between injection and production of sand body, reservoir quality difference, interlayer, reservoir rhythm and gravity have a direct control effect on the formation and distribution of remaining oil in ultra-high water cut stage. On this basis, the water flooding mode is summarized as imperfect injection and production type, combined production disturbed type, top enrichment type and interlayer controlled enrichment type. According to the water flooding mode, the fine potential tapping of horizontal wells is carried out, and the field application effect is good. The results have guiding significance for the fine potential tapping of oilfields in ultra-high water cut stage.

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