摘要
东北地区煤田中的煤层一般是一个典型的低速薄层,可采煤厚约1～8 m,这使得常规地震方法勘探煤层受到很大的限制.但由于煤层与围岩组成的是一个有规律的薄互层组合,所以通过研究薄互层的地震波波形、振幅、能量分配关系等特征来进行识别成为地震勘探煤层的一种可能.而高分辨三瞬技术能够提供精细化的波形、振幅等信息,因此本文将高分辨三瞬技术应用到识别煤田的薄互煤层中.本文针对楔形煤层模型,正演模拟研究了高分辨瞬时信息与煤层厚度之间的关系,并且将高分辨瞬时振幅和瞬时相位信息应用到吉林省某煤田的实际数据,增强了对煤层稳定发育区的识别.
Coal seams in the Northeast is generally a typical low-speed layer, Coal seams is about 1-8 m, which makes conventional seismic methods for exploration of coal has been greatly limited. However, due to the composition of coal and rock is a combination of regular thin layer, so thin layers by studying the seismic waveform, amplitude, the relationship between the characteristics of energy distribution to be identified as a possible seam seismic exploration. The technology provides high-resolution three instantaneous waveform, amplitude and other information, this article will prompt high-resolution techniques to identify the thin coal seam. This model for the wedge-shaped seam, forward modeling of the high-resolution instantaneous information and the relationship between seam thickness and the instantaneous amplitude and instantaneous high-resolution phase information is applied to actual data Jilin province coal fields, and enhance stability in developing areas of coal recognition.
出处
《地球物理学进展》
CSCD
北大核心
2011年第4期1386-1392,共7页
Progress in Geophysics
基金
国家自然科学基金项目(40974054)资助
关键词
高分辨
三瞬信息
薄互煤层
识别
high resolution, three-instantaneous analysis, thin interbed of coalfield, identification
