Interpretation of Dipole-Dipole Resistivity Monitoring Data at Cerro Prieto

摘要

Repetitive dipole-dipole resistivity data have been taken on a yearly basis at Cerro Prieto since 1978. Stations along a single profile line extending from the Cucapa Mountains to the center of the Mexicali Valley and passing over the present production zone have been remeasured with sufficient accuracy to detect subsurface changes in resistivity, some of which are probably related to fluid production. The precision of the most recent measurements (November 1981) averages about 1%. Results from two and one-half years of monitoring indicate a 5% annual increase in apparent resistivity over the present production area and decreases in apparent resistivity of the same magnitude in the regions immediately eastward and westward from the production zone. (ERA citation 08:017704)