二维可变线元观测技术及应用

TWO DIMENSION LINE UNIT-DIVISIBLE LAYOUT TECHNIQUES AND ITS APPLICATION

二维可变线元观测技术是一种基于三维面元理论基础上提出的观测系统设计方法。它的优点是在不改变观测系统的前提下,调整线元的大小,优化选择地震资料的信噪比和分辨率,为资料处理、解释拓展空间。实践证明,在资料信噪比较高的地区,可缩小CMP间距,有效地提高分辨率;在资料信噪比较低的地区,可用增加覆盖次数来提高信噪比,同时还能有效地降低勘探成本和勘探风险,具有广泛的实用价值。

Two dimension line unit-divisible layout technique is a method for d esigning layout based on three dimension bin theory. Its merit is that one can o ptimize seismic data S/N ratio and high-resolution by adjusting the line unit size on the premise of unchanging its layout, which extends the space for dat a processing and data interpretation. This paper discusses the basic theory and application of this method. With real cases from various areas, it is shown th at in practice we can reduce the distance between two CMP for resolution improve ment in the area with high S/N seismic data and that we can increase fold number for improving S/N ratio in the area with low S/N seismic data. Meanwhile, the t echnique can reduce costs and risk effectively for the field exploration and thu s it posses preferable practicability.