# Gamma Log

From Open Energy Information

## Exploration Technique: Gamma Log

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Exploration Technique Information | |
---|---|

Exploration Group: | Downhole Techniques |

Exploration Sub Group: | Well Log Techniques |

Parent Exploration Technique: | Well Log Techniques |

Information Provided by Technique | |

Lithology: | provides information on changes in rock type near the wellbore from changes in measured gamma radiation |

Stratigraphic/Structural: | using multiple gamma logs over an area, the depth to the sandstone and shale layers can be correlated over larger areas |

Hydrological: | |

Thermal: | |

Cost Information | |

Low-End Estimate (USD): | 0.25 25 centUSD / foot
2.5e-4 kUSD 2.5e-7 MUSD 2.5e-10 TUSD |

Median Estimate (USD): | 0.38 38 centUSD / foot
3.8e-4 kUSD 3.8e-7 MUSD 3.8e-10 TUSD |

High-End Estimate (USD): | 0.75 75 centUSD / foot
7.5e-4 kUSD 7.5e-7 MUSD 7.5e-10 TUSD |

Time Required | |

Low-End Estimate: | 0.35 days 9.582478e-4 years / job
8.4 hours 0.05 weeks 0.0115 months |

Median Estimate: | 0.69 days 0.00189 years / job
16.56 hours 0.0986 weeks 0.0227 months |

High-End Estimate: | 0.69 days 0.00189 years / job
16.56 hours 0.0986 weeks 0.0227 months |

Gamma Log:

Gamma logging is a method of measuring naturally occurring gamma radiation to characterize the rock or sediment in a borehole or drill hole. It is a wireline logging method used in mining, mineral exploration, water-well drilling, for formation evaluation in oil and gas well drilling and for other related purposes. Different types of rock emit different amounts and different spectra of natural gamma radiation.