论文部分内容阅读
不同的静校正技术基于不同的模型假设,适用于不同的地表地质条件。川东高陡构造地区,地震资料处理效果证明,在老地层出露区,微测井约束的层析静校正方法取得了满意的效果;在地表平缓地段,基于EGRM的折射静校正效果最好。只有采用综合静校正技术才能优势互补,解决好一次静校正问题。然后进行初至波多域剩余静校正和反射波剩余静校正。讨论了折射静校正、层析静校正和初至波多域剩余静校正的原理、假设条件、适用范围和误差分析,结合实际资料,处理中利用野外高密度的微测井资料,获得折射静校正的风化层速度;利用折射静校正反演的速度模型和微测井建立的速度模型,建立层析成像初始速度模型;利用直达波、折射波和回折波,进行初至波射线路径追踪、走时计算和大型稀疏矩阵方程的求解。
Different static correction techniques are based on different model assumptions and apply to different surface geological conditions. In the high-steep tectonic region of East Sichuan, the seismic data processing effect proves that satisfactory results are obtained in the stratum-derived static correction of the micro-logging constraint in the outcropping area of old strata and the geostationary refraction correction based on EGRM . Only by using the comprehensive static correction technology can complement each other to solve a static correction problem. After that, the residual statics and the residual statics of the reflections of the first arrivals are removed. The principles, assumptions, applicable ranges and error analysis of refraction static correction, chromatographic static correction and residual static correction in the first-arrival multidomain are discussed. Based on the actual data, the use of the high density micro-logging data in the field to obtain the refractive static correction The initial velocity model of tomosynthesis is established by using the velocity model of refraction static correction inversion and the velocity model established by micro-logging. The direct-wave, refracted and refracted waves are used to track the first-arrival ray path. Computation and solution of large sparse matrix equation.