Characteristics of Remaining Oil Distribution in Conglomerate Reservoirs after Water Flooding and Technical Countermeasures

doi:10.3969/j.issn.1006-6535.2023.01.021

Abstract

Abstract: In response to the problems of low water flooding control degree in conglomerate reservoirs and extremely imperfect well networks in Wellblock Bai 21, Baikouquan Oilfield in the Junggar Basin, the reservoir engineering method and reservoir geology are used as guidance to conduct fine research on reservoir architecture by applying dynamic and static data, analyze reservoir structure, sedimentation, reservoir in-homogeneous characteristics and oil and water distribution law, and improve the injection-production well patterns. The study results show that The idea of water injection optimization and adjustment “different strategies for different layer systems, adjustment and control by zone, classification by single well, and optimization of method” proposed in the article is very effective for the Baikouquan Oilfield. By carrying out the study on the distribution characteristics of the remaining oil and the reservoir injection and production well patterns in the Triassic system of Wellblock Bai 21, 56 dominant seepage channels were identified through comprehensive analysis by applying flowline simulation technology, and the submitted producing petroleum geological reserves were 975.00×10⁴t, and the accumulated oil increase was 16.60×10⁴t. This study has a reference effect for the improvement of injection and production well patterns and efficient tapping of similar reservoirs.

Key words: water flooding, remaining oil, conglomerate reservoirs, injection and production well patterns, Bai 21 well block Junggar Basin

CLC Number:

TE341

Ren Mengyao, Shi Qiang, Xin Huazhi, Liu Zhiqiang, Zhou Zhiliang. Characteristics of Remaining Oil Distribution in Conglomerate Reservoirs after Water Flooding and Technical Countermeasures[J]. Special Oil & Gas Reservoirs, 2023, 30(1): 147-153.

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