关键词: 叠前地震数据处理, AVO属性反演, 多参数综合分析, AVO正演模拟, 岩石物理分析, 固安地区

Abstract: Gu?an area is an old exploration area of Huabei Oilfield, where exploration becomes more and more difficult. However, the success rate of exploration well has been remarkably improved in recent years thanks to introduction of various new technologies. AVO technology is an important technological method for direct inspection of gas reservoirs. The result is more obvious when used to inspect shallow high-porosity sandstone. The article makes an detailed elaboration about successful application of AVO technology for shallow natural gas exploration in Gu?an area. Based on analysis of seismic attributes and AVO forward and inversion, it is confirmed that shallow gas reservoirs in Gu?an area have bright points and AVO characteristics of III type. Various technological methods, such as amplitude attributes, AVO inversion, and AVO elastic wave inversion, are used to analyze gas-sensitive attributes and predict the distribution characteristics of shallow gas in Gu?an area. The actual drilling results confirmed effectiveness of the above-stated methods, leading to a set of technology and mindset appropriate for exploration of shallow gas in Gu?an area