盆地边缘带优化观测系统采集技术探讨——泌阳凹陷唐河—井楼三维采集实例

Data acquisition in the basin margin with optimal layout: A case study in Tanghe-Jinglou area in Biyang sag.

泌阳凹陷西部带处在盆地构造的边缘,目的层深度变化较快,北部目的层较浅,南部存在边界大断裂,地层倾角较大。因此在浅层、超浅层及边缘带目的层变化区的采集方面,在保证边界大断裂的深部覆盖次数,提高深层信噪比等问题上,都需要进行深入细致的论证研究。针对地下构造特点,设计出分段优化渐变式观测系统,充分利用SPS电子班报优势,在唐河—井楼的三维地震采集中,实现了对浅层及深层的过渡采集。

The west part of Biyang sag is in the basin margin with variable depth of target, featuring shallow in the north and steep dips due to existence of major faults in the south. To balance the shallow or ultra-shallow target and deep target poses a great challenge. Taking the subsurface structure into account, we developed a piecewise optimized variable layout. The layout was demonstrated with the 3-D data acquisition carried out in Tanghe-Jinglou area. To ensure the efficiency and data quality, SPS format spreadsheet was adopted in the acquisition.