Page 155 - Standard Handbook Petroleum Natural Gas Engineering VOLUME2
P. 155
124 Reservoir Engineering
Figure 5-69. Chart for determining salinity, solution resistivity and for
converting resistivity to formation temperature [ 1991.
filtrate) flows through a nonmetallic permeable material. The magnitude of is a
function of the pressure drop across the material and the resistivity of the electro-
lyte. The electrokinetic (or streaming) potential is most significant in low pressure
(depleted) formations, overbalanced mud conditions and opposite low perme-
ability formations. See Doll's classic paper [201] for more detailed information.
The electrochemical component (Ec) is the sum of the liquidjunction potential
(Elj) and the membrane potential (E,). The liquid junction potential occurs at
