新疆大井南勘查区复杂表层条件下地震资料处理技术

新疆大井南勘查区位于克拉麦里山南麓的戈壁荒漠平原区,区内遍布戈壁、冲沟、沙丘、盐碱地和沙漠等多种地形,表层地震地质条件十分复杂。导致单炮记录差异大、干扰严重、信噪比低。通过采用叠前去噪、振幅补偿及一致性处理、静校正等手段,较好地解决了复杂表层条件引起的单炮品质差异问题,使剖面动力学特征和运动学特征统一,保持了较好的波组特征,具有较高的分辨率,较有利于薄煤层及煤层结构解释。

Seismic Data Processing Technology under Complex Near-surface Structure in Dajingnan, Xinjiang

The Dajingnan prospecting area in Xinjiang is located in a gobi desertness plain terrain at the southern foot of Karameri Mountain,and spread all over with multi-landforms of gobies,gullies,dunes,alkali flats and deserts,near-surface seismic-geologic condition is very complex and caused larger differences between single-shot records,serious interferences,low signal-noise ratios.Through the use of processing means of prestack noise reduction,amplitude compensation and consistency processing,as well as statics,have settled fairly good the issue of single-shot quality differences caused by complex near-surface conditions.Thus have unified profile dynamic and kinematic characters,keep better wave group characters,higher resolution,thereby in favor of thin coal seam and coal seam structure interpretation.