【摘要】 台南气田为第四系生物成因气藏 ,埋藏深度小、气层厚度大、构造简单 ,有利于地震资料识别油气藏。该区以往地震资料均为常规处理地震剖面 ,信噪比很低、同相轴连续性差 ,看不出任何气层特征。为此 ,我们对一条过气田的测线进行了地震资料处理试验。经分析 ,可以认为采用主频 2 0 Hz进行目标处理最能反映气层地震响应特征 ,如暗点、平点、同相轴下弯、低频效应和极性反转等。依据这些特征可以预测各层段天然气藏平面分布规律 ,从而满足了气田开发的需求更多还原

【Abstract】 Tainan gas field is Quaternary biogenetic gas,having characters of shallow buried depth,thicker gas-bearing bed and simple structure,which is of benefit to use seismic data to identify gas reservoir.Because the former seismic data in that area are common-processed seismic sections that have lower S/N ratio and poorer event continuity and any feature of gas-bearing bed has not been seen on the sections.Therefore,the processing tests have been carried out on a seismic line that crosses the gas field.The results showed that using 20 Hz in frequency to carry out target-oriented processing can best reflect the seismic response to the gas-bearing bed,such as dim spot,plat spot,event downwarping,low-frequency effect and polarity reversal etc. The planar distribution of gas reservoir in separate layers can be predicted according to these characters,that meets the need for development of gas field.更多还原