声波地层因素公式在含气泥质砂岩地层中的应用

Application of Acoustic Formation Factor Formula in Gas Bearing Shaly Sands

本文通过考察天然气对声波地层因素公式求孔隙度的影响,表明这种影响是不可忽视的。为了校正此影响,给出了相应的校正公式,并且还给出了泥质影响校正公式,进而把适应于不合气纯地层的声波地层因素公式推广到含气泥质砂岩地层。经实际试算,证明此种方法是可行的。

The gas effect on porosity derived from acoustic formation factor formula should not be neglected. In order to correct such effect, an appropriate correction formula is given herein, so as to apply the acoustic formation factor formula used in non-gas formation to gas bearing shaly sand formations. Practice shows the above method is satisfactory.