Method and system for evaluation of gamma-gamma well logging data in mineral exploration

一种γ测井、矿物的技术，应用在γ-γ工具和其对应的校准场领域，能够解决不准确信息、井眼分析不同技术不准确等问题

Inactive Publication Date: 2015-11-25
VALE LIMITED
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Also, different techniques for borehole analysis may be inaccurate
Such techniques for density measurement and lithology contact determination can yield inaccurate information due to the impossibility of preserving core interstitial space in the borehole or moving material during rod withdrawal

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  • Method and system for evaluation of gamma-gamma well logging data in mineral exploration
  • Method and system for evaluation of gamma-gamma well logging data in mineral exploration
  • Method and system for evaluation of gamma-gamma well logging data in mineral exploration

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Embodiment Construction

[0023] The present invention provides a calibration field for a gamma-gamma logging tool for use in mineral exploration, the calibration field comprising: a column consisting of a plurality of blocks of known density; objects to accommodate gamma-gamma logging tools.

[0024] The present invention further provides a method for calibrating a gamma-gamma logging tool at a calibration site, comprising: lowering a gamma-gamma logging tool into a plurality of blocks of different known densities and having boreholes therein in a column receiving a gamma-gamma logging tool; elevating the gamma-gamma logging tool at a set rate; acquiring a radiation count at a sensor of the gamma-gamma logging tool; and converting the radiation count at a computing device to recording density at a particular depth; and comparing the recording density at each location of the pillars to known densities.

[0025] Gamma-gamma logging involves exposing the borehole wall to radiation source induction and c...

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Abstract

A calibration site for a gamma-gamma well logging tool for use in mineral exploration, the calibration site having a column consisting of a plurality of blocks of known densities; and a borehole through the column configured to accept the gamma-gamma well logging tool. Further, a method for calibrating a gamma-gamma well logging tool at the calibration site, the method including lowering the gamma-gamma well logging tool into a column consisting of a plurality of blocks of different known densities and having a borehole therein to receive the gamma-gamma well logging tool; raising the gamma-gamma well logging tool at a set rate; capturing a radiation count at a sensor of the gamma-gamma well logging tool; converting the radiation count to a recorded density for a particular depth at a computing device; and comparing the recorded density at each position of the column with the known densities.

Description

[0001] Cross References to Related Applications [0002] This application is based on and claims priority benefit from US Provisional Application No. 61 / 988,783, filed May 5, 2014. The disclosure of this prior application is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to tools for mineral exploration and in particular to the use of gamma-gamma tools and their corresponding calibration fields. Background technique [0004] Geological drilling forms an important part of the process of prospecting for minerals such as iron ore. This borehole provided the lithology information that forms the geological model used in estimating resources and reserves. Geological drilling further allows borehole analysis to determine ore percentages later in exploration and mining. [0005] However, drilling is subject to operational factors that may lead to inaccurate conclusions. Such factors include foaming, recycling, and contam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V13/00
CPCG01V5/12G01V13/00G01V5/125
Inventor M·A·D·S·布拉加W·R·佩雷拉D·U·卡洛斯H·F·加尔比提
Owner VALE LIMITED
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