应用多种重力处理方法进行油气检测的试验及其效果

Hydrocarbon detection experiment by several gravity processing methods and its effect

中国新星石油公司石油物探研究所, 南京 210014

Research Institute of Geophysical Prospecting for Petroleum, CNSPC, Nanjing 210014

在重力勘探中, 用于油气检测的处理方法有多种, 最常用的有高阶导数法、归一化总梯度法和人工平滑求剩余场法。本文对这三种方法进行了比较, 就三种方法的原理与特点作一简略叙述, 并就三种方法在HQ地区的应用及其效果进行分析, 指出各方法的局限性与多解性, 从而提出了综合运用几种方法的必要性。特别提出了利用归一化总梯度对已知油气田区开展假三维的试验研究, 借以给出其空间形态与展布范围, 能收到较好的效果。

In gravity prospecting, there are various processing methods used for hydrocarbon detection. Themethods frequently used are high-order derivative method, normalized total gradient method and manual smoothing method. In the paper, we compare these three methods, briefly narrate the principles and features of these methods, and analyze the application of these methods to HQ area and its effect. We point out the limtation and ambiguity of each method. Therefore the necessity of comprehensively using several methods is proposed. Especially, the normalized total gradient is used to make pseudo-3-D exper-imental study for known oil and gas fields. So the spatial shape and areal extent of the oil and gas fieldsare obtained.