GROUNDWATER SALINITY AND RESOURCE EVALUATION BY SPONTANEOUS POTENTIAL MEASUREMENTS - EASTERN JEFFERSON AND CARTER COUNTIES, OKLAHOMA

The purpose of this study was to determine the volume and distribution of groundwater available for both domestic and industrial uses in Carter and Eastern Jefferson Counties, Oklahoma. Domestic water was defined as water with a TDS of less than 1000 mg/l and industrial water was defined as water with a TDS of between 1000 mg/l and 7000 mg/l. This was accomplished by using spontaneous potential measurements from over 700 oil well logs.;The Rwe-Rw and Rw-TDS relations for the two aquifers in the study area, the Garber Sandstone and the Oscar Group, were determined and are presented. All these corrections were incorporated into a computer program which computed the salinity of individual formations for over 700 wells.;Four maps were prepared; base of 1000 TDS, base of 7000 TDS, isopach of less than 1000 TDS and isopach of the 1000-7000 TDS water. The isopachs were planimetered and the pore volumes were calculated using density logs for porosities. There are 5.85 x 10('6)AcFt of water less than 1000 TDS and 14.02 x 10('6)AcFt of water between 1000 and 7000 TDS in the study area.;The hydraulic constants, chemical quality and the pollution potential around each municipality using the groundwater were also determined.;To compute fresh water salinities from spontaneous potentials with the accuracy necessary for this study the existing equations had to be examined and modified. This was achieved by collecting and analyzing empirical data from the study area. It was ascertained that the existing bore hole environmental correction and the Rmfe-Rmf corrections were not sufficient and new equations are presented. The bore hole environmental corrections are greater than predicted by the existing electric analog modeling.