It is difficult to control the precision of deploying the cable at the accurate point in the Ocean Bottom Cable (OBC) seismic data acquisition. Considering all the aspects of influencing factors, such as tidal current, inertia of cable into water and uneven cable deployment strength, we carried out mechanical analysis and kinematics analysis on the cable after deployed into the water, and proposed a theoretical calculation methods to improve the positioning precision of cable deployment in OBC seismic data acquisition. The new method can well calculate the reservation length of throwing point in longitudinal and transverse direction, which provides data criteria for selecting throwing point of cables. By applying the method, we can establish cable-laying database of the work area to scientifically guide actual operation, which can increase the precision of cable deployment .obtain more even fold and improve the quality of seismic data. So the operation efficiency can be enhanced, and the exploration period and risk can be reduced.%针对矿区/城市三维地震资料中存在的外源噪声、单频噪声和成片强能量噪声等环境噪声,提出了利用小波变换技术,将含有上述环境噪声的单炮记录变换到时频域,通过不同的小波尺度突出不同的环境噪声；然后在具有环境噪声的小波尺度上应用拟合减去法消除外源噪声和单频噪声,采用逆向小波阈值去噪技术拟合并压制强能量噪声；最后通过小波重构得到消除环境噪声后的记录.利用理论模型和某矿区三维实际资料对上述方法进行了测试和分析,结果表明,该方法能够有效地消除各类环境噪声,并且对有效信号损害很小.
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