黄河口凹陷新近系岩性￣构造油藏断层封闭性评

Fault sealing of Neogene lithology-structural reservoirs in the Huanghekou Sag

曹龙 王少鹏 高鹏宇 张岚 岳红林

中海石油（中国）有限公司天津分公司，天津 300452

Tianjin Branch of CNOOC Ltd., Tianjin 300452, China

为明确黄河口凹陷新近系岩性￣构造油藏的断层封闭性与油水分布特征，运用三维地震资料、钻井及生产测试资料，利用砂体描述技术刻画出断层附近砂体的空间展布形态，建立了可靠的断层Allan图，识别出断层两盘砂岩对接区并计算断层泥岩比率参数（ISGR），通过确定ISGR参数的封闭下限，判断断层的侧向封闭性。结果表明：研究区断层侧向存在3种岩性对接模式；砂泥岩对接的封闭性最强；同期砂岩对接与非同期砂岩对接的封闭性取决于对接区ISGR值的大小。利用该方法，确立了研究区滚动勘探优势区，并通过实施2口评价井验证了该方法的可靠性。

 In order to clarify the fault sealing and oil-water distribution of the Neogene lithology-structural reservoirs in the Huanghekou Sag, 3D seismic data, drilling and production test data are used to describe the space distribution form of sand body near faults through sand body descriptions. From this, a reliable Allan map of the fault is established to identify the area in where the two sides of fault are docked and calculate shale gouge ratio (ISGR). Then, the lateral sealing of the fault is determined by identifying the lower limit of ISGR. The results show that there are three lithological docking modes in the study area. Sandstone and mudstone docking in the fault have the strongest sealing. The fault sealing between contemporaneous sandstone docking and non-contemporaneous sandstone docking depends on the ISGR in the docking area. The dominant rolling exploration area has been determined by means of this research method. The reliability of research method was verified by two implementing wells.

10.6056/dkyqt202204011