(1. 中南大學(xué) 地球科學(xué)與信息物理學(xué)院，長(zhǎng)沙 100083；2. 山西省煤炭地質(zhì)物探測(cè)繪院，晉中 030600)
摘 要: 采用初至層析靜校正方法，解決地表起伏大、縱橫向速度變化劇烈的復(fù)雜地區(qū)的折射靜校正效果不好的問(wèn)題。介紹初至層析靜校正原理，并根據(jù)需要建立橫向速度變化大且基巖裸露的地震模型進(jìn)行理論試算，分析層析靜校正的特點(diǎn)及適用條件，指出層析靜校正應(yīng)注意的關(guān)鍵問(wèn)題。利用數(shù)值模擬手段研究初至層析靜校正的適用條件和應(yīng)用效果，為復(fù)雜地表煤層氣地震資料靜校正提供參考依據(jù)。結(jié)果表明：層析靜校正更適合復(fù)雜地表煤層氣地震資料的處理，能夠很好地解決地表起伏問(wèn)題和速度橫向變化問(wèn)題，對(duì)提高煤層氣勘探精度具有重要意義。
關(guān)鍵字: 復(fù)雜地表；煤層氣；地震勘探；靜校正；層析反演
（1. School of Geosciences and Info-Physics, Central South University, Changsha 410083, China;
2. Shanxi Coal Institute of Geological Geophysical Exploration and Mapping, Jinzhong 030600, China）
Abstract:First arrival tomographic statics method was applied to solve bad effects problem of refraction statics in large undulating surface, vertical and horizontal velocity rapidly changing complex areas. The principles of tomographic static were introduced, large and exposed bedrock seismic model correction and lateral velocity variations were built for theoretical computation, characteristics and applicable conditions of chromatographic were analyzed, key issues of chromatography statics were noted. Numerical simulation tools were applied to study the early tomographic static correction application conditions and application effects, and a reference was provided for complex surface statics seismic data. The results show that tomographic static correction is more suitable for seismic data processing of complex surface. It is a good solution for the problem of surface undulation and lateral velocity change, and it is important for improving the accuracy of coalbed methane exploration.
Key words: complex surface; coalbed methane; seismic prospecting; statics; tomographic inversion
