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    高邮凹陷花庄地区阜二段页岩储层多尺度裂缝预测技术研究及应用

    Research and application of multi-scale fracture prediction techniques for shale reservoirs in the second member of Funing Formation in Huazhuang area of Gaoyou sag

    • 摘要: 在页岩油勘探开发过程中,裂缝的预测及评价极为重要。可靠的裂缝特征描述可以支撑水平井的部署设计与钻探,有利于合理选择压裂开发位置,使得页岩地层通过压裂连通已有裂缝,形成网状结构,提高单井估计最终采收量(EUR)。针对花庄地区阜二段页岩储层不同尺度的裂缝,结合钻井资料和区域地质背景,以叠后和叠前地震资料为基础,开展多尺度裂缝预测技术研究与应用。结果表明基于深度域地震的高清蚂蚁体对中、大尺度裂缝的发育情况识别效果好,基于叠前地震数据各向异性特征的裂缝预测,对于小尺度的裂缝具有较好的预测效果,多尺度裂缝融合明确了研究区裂缝发育特征。研究区实钻井、示踪剂数据及成像测井结果进一步验证了多尺度裂缝预测的准确性及可靠性,为页岩油水平井开发部署提供了技术支撑。

       

      Abstract: Fracture prediction and evaluation is extremely important to shale oil exploration and development. Reliable fracture characterization can support the deployment and drilling of horizontal wells and facilitate optimal placement of fracturing operations, so as to form a network structure by connecting hydraulic fractures with natural fractures and thereby improve single-well EUR. Based on poststack and prestack seismic data combined with drilling data and regional geological background, this study focuses on multi-scale fracture prediction for the shale reservoirs of the second member of the Funing Formation in Huazhuang area. The results show that the high-definition ant body based on depth-domain seismic data effectively identifies medium- and large-scale fractures. Anisotropic detection using prestack seismic data effectively predicts small-scale fractures. Multi-scale fracture fusion clarifies the fracture development characteristics in the study area. The actual drilling, tracer, and imaging logging results in the study area further verify the accuracy and reliability of multi-scale fracture prediction, which provides technical support for the deployment of shale oil horizontal wells.

       

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