【摘要】 柴达木盆地三湖地区生物天然气气藏发育。气藏在地震剖面上表现为低频、低速和强振幅特征,反射同相轴出现下拉现象。根据这些特征,提出了三湖地区生物天然气储层预测方法,包括共偏移距扫描、频率扫描、常速扫描、速度谱剖面分析、反射同相轴下拉量分析和烃类检测等。对3条过井测线利用上述方法进行了含气性分析和评价。结果表明,生物天然气预测方法可以很好地识别气藏的圈闭范围,有效地评价气藏的含气丰度。更多还原

【Abstract】 Biogas reservoirs are well-developed in Sanhu area,Chaidamu basin.They are characterized by low frequency,low speed,and strong amplitude on seismic profiles,with the reflection events showing a pulling-down pattern.According to these characteris- tics,the biogas prediction methods in Sanhu area were proposed, including common offset scan,frequency scan,constant velocity scan,velocity spectrum profile analysis,pulling-down analysis of reflection events and hydrocarbon detection,etc.The above men- tioned method was applied in analyzing and evaluating gas-bearing situation of three cross-well lines.The results show that biogas prediction method can well identify trap range of gas reservoir and effectively evaluate the gas-beating abundance.更多还原