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A common gamma-ray log records the total radiation and cannot distinguish between the radioactive elements, while a spectral gamma ray log (see below) can. For standard gamma-ray logs, the measured value of gamma-ray radiation is calculated from concentration of uranium in ppm, thorium in ppm, and potassium in weight percent: e.g., GR API = 8 ...
Thus the presence or absence of gamma rays in a borehole is an indication of the amount of shale or clay in the surrounding formation. The gamma ray log is useful in holes drilled with air or with oil based muds, as these wells have no SP voltage. Even in water-based muds, the gamma ray and SP logs are often run together.
The formation evaluation gamma ray log is a record of the variation with depth of the natural radioactivity of earth materials in a wellbore. Measurement of natural emission of gamma rays in oil and gas wells are useful because shales and sandstones typically have different gamma ray levels.
The Spiller Farm Paleoindian Site, designated Site 4.13 by the Maine Archaeological Survey, is a prehistoric archaeological site in Wells, Maine.Located overlooking a stream on the Spiller Farm property on Branch Road, it is an extensive site at which a fine collection of stone artifacts has been found, dating to c. 8,000 BCE.
Spontaneous potential log, commonly called the self potential log or SP log, is a passive measurement taken by oil industry well loggers to characterise rock formation properties. The log works by measuring small electric potentials (measured in millivolts) between depths with in the borehole and a grounded electrode at the surface.
A developer is proposing to build more than 100 new homes and about 40 new townhouses on currently wooded property behind the antiques shop at 502 Post Road in Wells, Maine.
Maine Historical Society: November 17, 1980 : 485 Congress St. The Society's 1907 Library Building, located next to the Wadsworth-Longfellow House. 51: Maine Publicity Bureau Building: Maine Publicity Bureau Building: January 26, 1990
Plans for Maine’s most photographed home sparks debate Planning Board members will take a site walk at the motel on Wednesday, Aug. 16, at 6:30 p.m. The main carriage house was built in 1900 ...