Hot water zone

Table 2 indicates that the hot water zone is characterized by a pore pressure increase of 100 psia, a temperature increase of about 150 $^{\circ}$F, and a reduction of gas saturation to about 0%, compared to ambient reservoir conditions. The pore pressure increase results in a V_p decrease of about 5%. The temperature increase of the pure water phase results in a 5% V_p decrease from core measurements by Wang and Nur 1989. The reduction of the gas saturation from an initial 10% to a final 0% may result in a V_p increase as large as 20-25%. Combining these effects implies that the hot water zone may be characterized by a net increase in V_p by 5-10%. Density variations are negligible.