| 利用横波源四分量VSP资料检测盐城凹陷地下裂缝 |
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| 引用本文： | 董良国,马在田,丁建荣.利用横波源四分量VSP资料检测盐城凹陷地下裂缝[J].石油地球物理勘探,2000,35(4):517-526. |
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| 作者姓名： | 董良国 马在田 丁建荣 |
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| 作者单位： | 同济大学海洋地质与地球物理系(董良国，马在田)，江苏石油勘探局(丁建荣) |
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| 摘 要： | 在国内首次采用远井源距纵波源 VSP资料进行检波器定位 ,效果明显。对数据进行了下行波分离、Alford旋转、S波震源能量归一化等处理和分析。在获得地下裂隙方位角的同时 ,结合零偏纵波 VSP资料得到快、慢 S波记录 ,进而计算了裂隙密度。通过计算 ,在 YC- 1井附近发现了地下3150 m以下厚达 70 0 m的裂缝密集带 ,裂缝走向方位约 86°。
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| 关 键 词： | 垂直地震剖面 VSP 地下裂缝 电法勘探 油气运移 |
Detecting the formation fractures in Yancheng depression by analysing the four-component VSP data of S-wave source. |
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| Dong Liangguo,Ma Zaitian and Ding Jianrong.Dong Liangguo.Detecting the formation fractures in Yancheng depression by analysing the four-component VSP data of S-wave source.[J].Oil Geophysical Prospecting,2000,35(4):517-526. |
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| Authors: | Dong Liangguo Ma Zaitian and Ding JianrongDong Liangguo |
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| Affiliation: | Dong Liangguo,Ma Zaitian and Ding Jianrong.Dong Liangguo,Department of Ocean Geology and Geophysics,Tongji University,Shanghai City,200092 |
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| Abstract: | Far offset P wave source VSP data was first used in geophone positioning in China, resulting in obvious effect. Down going wave seperation and Alford rotation must be done, and the energy of S wave source must be normalized and analysed carefully. Then the azimuth of formation fractures is estimated; and with the joint use of zero offset P wave source VSP data, fast and slow shear wave seismograms are obtained to have fracture density. After computation and analysis, the 700m thick dense fracture belt below 3150m depth was found nearby YC 1 borehole, whose fracture azimuth is about 86 degrees. |
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| Keywords: | fracture shear wave splitting vertical seismic section Alford rotati |
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