دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

NORM scale, usually barium or strontium sulfate scale with very low level radiation from atoms of uranium, thorium and potassium in the matrix of the scale.

n pi: (NORM) radioactive materials that occur naturally and that are brought to the surface during drilling operations or that contaminate drilling fluids, pipe scale, soil, or equipment. Although the EPA regulates NORM only in fertiliser (as of June 1992),it is likely that the regulation of other NORM material will follow in the near future. Currently, only Louisiana has state NORM regulations, but many other states are in the process of initiating regulations or have expressed an interest in doing so.

abbr: naturally occurring radioactive materials.

a naturally occurring radioactive scale. Usually Barium Sulfate scale with Uranium or Radium atoms substituted into the lattice structure. Can be detected downhole with a gamma ray log.