浅海过渡带地区气枪阵列的设计与优化
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摘要
在设计浅海过渡带地区气枪阵列前,应对海底岩性以及勘探目的层的地球物理特性进行调查,针对水的深浅选择合适的气枪阵列沉放深度与气枪工作水深、气枪阵列矩阵大小。然后利用nucleus气枪阵列模拟软件进行阵列模拟,通过对比气枪阵列的气泡比,峰—峰值以及频率特性等选定几种气枪阵列,并通过试验确定最终的气枪阵列。从A和B两个地震项目的实施结果来看,设计的气枪阵列充分考虑了项目区的水域特点以及地层的地球物理特性,获得了较好的勘探效果。
Before designing the airgun array in transient zone of shallow sea, it should investigate geophysical feature of explored targets and lithology of sea bottom and select the appropriate sink depth of airgun array, working water depth of airgun and size of airgun array according to depth of water. After that, using Nucleus airgun array simulating software to simulate the array, determine several airgun arrays by bob ratio, peak-to-peak value and frequency feature and define the final airgun array by experiments. It is shown by practices of two seismic objects: A and B that the characters of water area and geophysical feature of layers in the objective zone are fully considered in the designed airgun array, which achieved good prospecting effects.
Before designing the airgun array in transient zone of shallow sea, it should investigate geophysical feature of explored targets and lithology of sea bottom and select the appropriate sink depth of airgun array, working water depth of airgun and size of airgun array according to depth of water. After that, using Nucleus airgun array simulating software to simulate the array, determine several airgun arrays by bob ratio, peak-to-peak value and frequency feature and define the final airgun array by experiments. It is shown by practices of two seismic objects: A and B that the characters of water area and geophysical feature of layers in the objective zone are fully considered in the designed airgun array, which achieved good prospecting effects.
引文
[1]陈浩林等.气枪阵列子波数值模拟.石油地球物理勘探,2003,38(4):363~368
[2]Bill Dragoset.Introduction to air guns and air-gun ar-rays.The Leading Edge,2000,19(8)
[3]杨怀春等.海洋地震勘探中空气枪震源激发特性研究.石油物探,2004,43(3)
[4]翟鲁飞.论地震生产中气枪震源的沉放深度.石油天然气学报,2006,4:264~266
[2]Bill Dragoset.Introduction to air guns and air-gun ar-rays.The Leading Edge,2000,19(8)
[3]杨怀春等.海洋地震勘探中空气枪震源激发特性研究.石油物探,2004,43(3)
[4]翟鲁飞.论地震生产中气枪震源的沉放深度.石油天然气学报,2006,4:264~266
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