Oil stains on drilling samples have also been encountered in several other zones below the basalt. It is estimated that the field has produced over 10,000 barrels of oil. The reservoir is under very low pressure, but has a reservoir temperature up to 115 F which allows the oil to flow. Some oil was produced from pipes driven a few feet into the oil seeps. All attempts to enhance production were unsuccessful including the use of down-hole electric heaters and steam injection.
Unplugged wells continue to flow small amounts of oil in warm weather.
The oil produced at Rozel Point has some unusual characteristics. It contains up to 12 percent sulfur, has anomalously high nitrogen concentrations, and is highly asphaltic. Oil from Rozel Point is extremely difficult to produce and costly to refine. It is chemically similar to ichtyol, a rare substance used for medicinal purposes and thus has the potential to be an extremely valuable commodity. Higher fractions of the asphalt, when added to motor oil, are known to increase the lubricity of the oil thus making it more useful.