CAJ | 학술논문

羌塘盆地前期常规二维地震勘探中，获得的资料有效波反射能量较弱，波组连续性较差，相干噪声、散射噪声较强，资料信噪比较低。分析认为提高覆盖次数对该区的叠加成像效果有明显改善，在此基础上，提出了3种宽线观测系统采集方案，经理论分析和应用对比，2L2S（炮点分布在接收线之外35m）的宽线观测系统为最佳方案。实践表明：该方案在压制侧向的散射噪声、相干噪声有较好的效果；在单线采集的基础上成倍地增加了叠加剖面覆盖次数，增强了有效信号，提高了资料的整体信噪比。
강당분지전기상규이유지진감탐중，획득적자료유효파반사능량교약，파조련속성교차，상간조성、산사조성교강，자료신조비교저。분석인위제고복개차수대해구적첩가성상효과유명현개선，재차기출상，제출료3충관선관측계통채집방안，경이론분석화응용대비，2L2S（포점분포재접수선지외35m）적관선관측계통위최가방안。실천표명：해방안재압제측향적산사조성、상간조성유교호적효과；재단선채집적기출상성배지증가료첩가부면복개차수，증강료유효신호，제고료자료적정체신조비。
There are weaker reflect wave energy, poor wave group continuity, stronger coherent noise and scattering noise, and lower signal to noise ratio (SNR) of data in the early 2 -D seismic exploration of Qiangtang Basin. After analyses,it is considered that raising coverage number of times can obviously improve the stacked imaging effect of the area. Therefore, three acquisition plans for wide - line observation system were proposed out. By theory analyses and application contrast, the 2L2S (shot points were distributed at 35 meters beyond the receiving line) plan is proved to be the optimum. The scheme can effectively suppress the lateral scattering noise and coherent noise, increase the coverage number of times of stacked profile in multiples, strengthen the effective signal, and improve the whole SNR of data.