CAJ | 학술논문

奥塔北井田煤层多、埋藏浅，煤层结构及煤层厚度变化大，存在煤层对比困难、煤层露头难以控制等问题。为此将先期开采区块划分为二维区与三维区，其中二维区采用小道距、小炮距的观测系统，重点控制浅部地层倾角和煤层露头；三维区采用8线8炮、小CDP网格的观测系统，重点解决煤层结构问题。在后期的处理解释中，采用分频处理方法，以提高地震资料中的高频能量；利用波阻抗反演，进行煤层反射波标定，以提高煤层分叉合并与煤层夹矸的分辨能力。奥塔北井田先期开采区块勘探实例表明，二维与三维地震互补的勘探方法，对控制煤层露头、解释煤层分叉合并、确定煤层结构与煤层间关系等地质现象，具有较好的勘探效果。
오탑북정전매층다、매장천，매층결구급매층후도변화대，존재매층대비곤난、매층로두난이공제등문제。위차장선기개채구괴화분위이유구여삼유구，기중이유구채용소도거、소포거적관측계통，중점공제천부지층경각화매층로두；삼유구채용8선8포、소CDP망격적관측계통，중점해결매층결구문제。재후기적처리해석중，채용분빈처리방법，이제고지진자료중적고빈능량；이용파조항반연，진행매층반사파표정，이제고매층분차합병여매층협안적분변능력。오탑북정전선기개채구괴감탐실례표명，이유여삼유지진호보적감탐방법，대공제매층로두、해석매층분차합병、학정매층결구여매층간관계등지질현상，구유교호적감탐효과。
The Aota north minefield possesses of multiple shallow buried coal seams with varied structure and thickness, thus hard to correlation and outcrop control. So, divided the prophase extracting block into 2D and 3D seismic prospecting areas, in which, 2D area uses small group interval and small shotpoint gap field setup, emphases upon shallow part strata dip angle and coal outcrop control;3D area uses 8 line 8 shotpoint, small CDP grid field setup, emphases upon coal seam structure. During the later processing and interpreta?tion, using scaling down processing, to improve high frequency energy in seismic data;using the wave impedance inversion carried out coal seam reflection wave calibration to improve differentiation of coal seam splitting, merging and gangue. The case study of prospect?ing in Aota north minefield prophase extracting block has shown that the complimentary prospecting method of 2D and 3D seismic has better effects on geological phenomena determination of coal seam outcrop control, coal seam splitting and merging interpretation, coal seam structure and relationship between coal seams etc.