The Bureau of Mines conducted a geochemical study of the Smackover Formation to determine what geochemical relationships are useful in exploration for and production of oil and gas. Samples of oil, gas, brine, and rock were collected and analyzed. It was concluded that oil and gas detection indicators include the following: dissolved gases in the water, a pressure gradient <0.65 Psi per foot of depth, hydrostatic or near-hydrostatic water, cl-ca type of water, s1s2a2 class of water, so4 x 100/cl<in cl-ca type of water, negative redox potential, temperature 69 deg. to 149 deg. C, positive indication of a source rock, organic acid salts dissolved in water, and iodide and bromide concentrations of 1 mg/l and 300 mg/l, respectively, in the water.
Oil and Gas J., V. 72, No. 21, May 27, 1974, PP. 90-94