柴达木盆地三湖地区第四系生物气藏地震响应特征及应用

Seismic response characteristics of the Quaternary biogas reservoirs in the Sanhu area of the Qaidam Basin and their application

柴达木盆地三湖地区第四系由于沉积时间短、成岩作用弱,形成了特有的"低频、低速、同相轴下拉"的地震异常反射特征。通过"时间域"和"深度域"两方面对柴达木盆地三湖地区第四系的地震资料进行解释,得出其第四系的地层分布和构造形态,并发现解释成果与钻探效果高度吻合,据此推测三湖坳陷北斜坡仍然是今后生物气勘探的重要前景区。

The Quaternary formation in the Sanhu area of the Qaidam Basin has shown anomalous seismic response characteristics of low frequency,low velocity and downward event because of short deposition time and weak diagenesis.The seismic data of the Quaternary formation of the Sanhu area in the Qaidam basin has been interpreted in respects of time domain and depth domain.The interpreted Quaternary strata distribution and structural configuration highly coincide with the drilling results.Therefore it is inferred that the north slope of the Sanhu depression is an important prospect area of biogas exploration.