CAJ | 학술논문

针对高速玄武岩屏蔽层下深层成像困难的实际问题,采用波动方程波场数值模拟技术,根据玄武岩地层的特点,设计三个相应的简单高速玄武岩模型,通过对深层反射地震信号能量的分析,说明了低频地震信号既具有较强的穿透薄高速玄武岩屏蔽层的能力,也具有减弱因粗糙表面所产生的绕射噪音的能力.一个完整的2D玄武岩模型的模拟试验证明了利用低频信号可以提高高速玄武岩屏蔽层下深层成像的质量,实际资料的低通滤波处理也取得了预期的效果.
침대고속현무암병폐층하심층성상곤난적실제문제,채용파동방정파장수치모의기술,근거현무암지층적특점,설계삼개상응적간단고속현무암모형,통과대심층반사지진신호능량적분석,설명료저빈지진신호기구유교강적천투박고속현무암병폐층적능력,야구유감약인조조표면소산생적요사조음적능력.일개완정적2D현무암모형적모의시험증명료이용저빈신호가이제고고속현무암병폐층하심층성상적질량,실제자료적저통려파처리야취득료예기적효과.
Wave equation wave field numerical modeling technology is applied to the observation that deep layer imaging is difficult below a screening layer of high-velocity basalt. Three simple high-velocity basalt models are designed on the basis of basalt formation characteristics. The analysis of deep-layer reflection seismic signal energy shows that low-frequency seismic signals are capable of both penetrating the thin high-velocity basalt layer and reducing the diffraction noise caused by the rough surfaces. The simulation experiment of a complete 2D basalt model confirms that the low-frequency signals can be used to boost the quality of deep-layer imaging under the high-velocity basalt layer and achieve good results in low-pass filter processing of actual data.