The apparent formationfactor increases with the increase of the salinity of formation water.
泥质砂岩视地层因素与地层水电阻率有关，随地层水矿化度升高而增大。
2
The gas effect on porosity derived from acoustic formationfactor formula should not be neglected.
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。
3
Resistivity apparent formationfactor, apparent cement exponent, resistivity index and apparent saturation exponent of shaly sands are related to temperature.