三维散射声波远探测测井裂缝评价的物理模拟
赵腾 , 车小花 , 乔文孝 , 程路 , 卢俊强 , 门百永
地球科学 ›› 2023, Vol. 48 ›› Issue (07) : 2703 -2717.
三维散射声波远探测测井裂缝评价的物理模拟
Experimental Simulation of Fracture Evaluation Based on Borehole 3D Scanning Acoustic Imaging Using Scattered Waves
,
现有的远探测声波测井主要利用了反射波信息,这不利于井旁地层中裂缝的高分辨率成像,而基于散射波的探测方法才有可能获得更高分辨率的测量结果.提出一种三维散射声波远探测扫描成像方法及结合平面扫描成像和球面扫描成像的技术实现方案,采用薄铝板来模拟井旁地层裂缝,在大水面湖中开展了方位远探测声波测井水下物理模拟实验,用本文提出的反演成像技术处理了实验数据.数据处理结果表明,三维散射声波远探测扫描成像方法能够提高成像信噪比、分辨率和探测范围,较准确地估计井旁裂缝的径向距离、方位、倾角、尺度和深度等参数;与3D-STC和Beamforming方法相比,基于散射波的扫描成像方法不必假设回波信号为平面波,提高了井旁裂缝方位定位准确性.本文方法有望突破目前远探测声波测井技术的局限性,具有良好的应用前景.
散射波 / 裂缝评价 / 物理模拟 / 空间扫描成像 / 远探测声波测井
scattered wave / fracture evaluation / experimental simulation / space scanning imaging / borehole acoustic imaging
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国家自然科学基金项目(12274465;42174218)
中石油战略合作科技专项长庆专项(ZLZX2020-02)
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