The development of geological structures in the study area is relatively complicated. In order to optimize mining, it is urgent to find out the distribution characteristics of hidden geological structures such as faults and goafs in the area. In coal field data processing, the post-stack time-migration diffraction wave is difficult to return to its place, and data interpretation has problems such as diversification and low interpretation accuracy. The article discusses the scope of application of Kirchhoff pre-stack time migration for bending rays. On the basis of the preliminary work of data processing such as high-precision static correction, pre-stack amplitude preservation and denoising, amplitude compensation, deconvolution, etc., through fine iterative migration speed, preferred aperture, anti-aliasing operator and other migration parameters, the data in the area is offset imaging processing. The application results showed that the accuracy of Kirchhoff pre-stack time migration was significantly higher than that of post-stack time migration, which improved the interpretation accuracy of faults, goaf areas and other structures, and reduced the ambiguity of data interpretation. The amplitude-preserving pre-stack migration process maintains the amplitude response characteristics of faults and goafs and other coalfield structures, thereby improving the resolution of faults and goafs. Therefore, in the exploration of such complex structures in 3D coalfields, it is necessary to use pre-stack time migration processing to maintain amplitude.
赵万书，白 涛，张 超. 叠前时间偏移在煤田复杂构造勘探中的应用[J]. 煤炭与化工, 2020, 43(7): 42-46,49.
Zhao Wanshu, Bai Tao, Zhang Chao. Application of pre-stack time migration in the exploration of complex structures in coal fields. CCI, 2020, 43(7): 42-46,49.
