Buried object evaluating method, underground resources evaluating method, underground waste evaluating method, underground preserved object evaluating method, stratum structure evaluating method and building interior monitoring method, all using hard X-rays or y-rays

Abstract

As a method for using a hard X-ray sensor that can detect weak hard X-rays or the like with a higher resolution, a method for accurately evaluating natural resources of crude oil, natural gas, etc. existing underground, for example, is provided. A buried object evaluating method includes a detecting step of arranging a radiation detector to be opposed to a hard X-ray source radiating first hard X-rays with a buried object buried in a first substance being interposed between the radiation detector and the radiation source and, by using the radiation detector, detecting second hard X-rays transmitted through the buried object out of the first hard X-rays and third hard X-rays not transmitted through the buried object, and an evaluating step of evaluating the buried object based on a strength of the first hard X-rays and a strength of the second hard X-rays detected by the radiation detector.

1 . A buried object evaluating method comprising: 
 a first step of radiating a neutron beam to a buried object buried in a first substance to thereby cause a second substance constituting said buried object and a neutron to interact with each other so that a radiation of hard X-rays or γ-rays is released from said second substance,    a second step of, by using a radiation detector, detecting said radiation released from said second substance, and    a third step of evaluating said buried object based on a strength of said radiation detected by said radiation detector.    
   
   
       2 . A buried object evaluating method as claimed in  claim 1 , wherein said third step includes estimating said second substance constituting said buried object based on a spectrum of said radiation detected by said radiation detector.  
   
   
       3 . A buried object evaluating method as claimed in  claim 1 , wherein said third step includes quantitatively evaluating said buried object based on a generation quantity of said radiation detected by said radiation detector.  
   
   
       4 . An underground resources evaluating method comprising: 
 a first step of radiating a neutron beam to underground resources buried underground to thereby cause a first substance constituting said underground resources and a neutron to interact with each other so that a radiation of hard X-rays or γ-rays is released from said first substance,    a second step of, by using a radiation detector, detecting said radiation released from said first substance, and    a third step of evaluating said underground resources based on a strength of said radiation detected by said radiation detector.    
   
   
       5 . An underground resources evaluating method as claimed in  claim 4 , wherein said third step includes estimating said first substance based on a spectrum of said radiation detected by said radiation detector and thereby evaluating an existence of said underground resources.  
   
   
       6 . An underground resources evaluating method as claimed in  claim 5 , wherein said underground resources are crude oil and said third step includes estimating liquid hydrocarbon for said first substance and thereby evaluating that said underground resources are an oil field.  
   
   
       7 . An underground resources evaluating method as claimed in  claim 5 , wherein said underground resources are natural gas and said third step includes estimating gas hydrocarbon for said first substance and thereby evaluating that said underground resources are a natural gas field.  
   
   
       8 . An underground resources evaluating method as claimed in  claim 5 , wherein said underground resources are coal and said third step includes estimating carbon for said first substance and thereby evaluating that said underground resources are a coal field.  
   
   
       9 . An underground resources evaluating method as claimed in  claim 5 , wherein said underground resources are a predetermined metal and said third step includes estimating said predetermined metal for said first substance and thereby evaluating that said underground resources are a metal ore deposit.  
   
   
       10 . An underground resources evaluating method as claimed in  claim 4 , wherein said third step includes quantitatively evaluating said underground resources based on a generation quantity of said radiation detected by said radiation detector.  
   
   
       11 . An underground waste evaluating method comprising: 
 a first step of radiating a neutron beam to waste disposed underground to thereby cause a first substance constituting said waste and a neutron to interact with each other so that a radiation of hard X-rays or γ-rays is released from said first substance,    a second step of, by using a radiation detector, detecting said radiation released from said first substance, and    a third step of evaluating said waste based on a strength of said radiation detected by said radiation detector.    
   
   
       12 . An underground waste evaluating method as claimed in  claim 11 , wherein said third step includes estimating said first substance based on a spectrum of said radiation detected by said radiation detector and thereby evaluating an existence of said waste.  
   
   
       13 . An underground waste evaluating method as claimed in  claim 11 , wherein said waste is an injected carbon dioxide.  
   
   
       14 . An underground waste evaluating method as claimed in  claim 11 , wherein said third step includes quantitatively evaluating said waste based on a generation quantity of said radiation detected by said radiation detector.  
   
   
       15 . An underground preserved object evaluating method comprising: 
 a first step of radiating a neutron beam to a preserved object preserved underground to thereby cause a second substance constituting said preserved object and a neutron to interact with each other so that a radiation of hard X-rays or γ-rays is released from said first substance,    a second step of, by using a radiation detector, detecting said radiation released from said first substance, and    a third step of evaluating said preserved object based on a strength of said radiation detected by said radiation detector.    
   
   
       16 . An underground preserved object evaluating method as claimed in  claim 15 , wherein said third step includes estimating said first substance based on a spectrum of said radiation detected by said radiation detector.  
   
   
       17 . An underground preserved object evaluating method as claimed in  claim 15 , wherein said preserved object is natural gas and said third step includes estimating gas hydrocarbon for said first substance and thereby evaluating that said preserved object is a natural gas field.  
   
   
       18 . An underground preserved object evaluating method as claimed in  claim 15 , wherein said third step includes quantitatively evaluating said preserved object based on a generation quantity of said radiation detected by said radiation detector.  
   
   
       19 . A flow state evaluating method comprising: 
 a first step of radiating a neutron beam to fluid reserved in a vessel to thereby cause said fluid and a neutron to interact with each other so that a radiation of hard X-rays or γ-rays is released from said fluid,    a second step of, by using a radiation detector, detecting said radiation released from said fluid, and    a third step of evaluating a flow state of said fluid based on a strength of said radiation detected by said radiation detector.    
   
   
       20 . A flow state evaluating method as claimed in  claim 19 , wherein said third step includes estimating a density of said fluid based on a spectrum of said radiation detected by said radiation detector and thereby evaluating the flow state of said fluid.  
   
   
       21 . A flow state evaluating method as claimed in  claim 19 , wherein said third step includes quantitatively evaluating the flow state of said fluid based on a generation quantity of said radiation detected by said radiation detector.  
   
   
       22 . A flow state evaluating method comprising: 
 a first step of radiating a neutron beam to an area including a flow path of volcanic magma to thereby cause a substance existing in said area and a neutron to interact with each other so that a radiation of hard X-rays or γ-rays is released from said substance,    a second step of, by using a radiation detector, detecting said radiation released from said substance, and    a third step of evaluating a flow state of said volcanic magma based on a strength of said radiation detected by said radiation detector.    
   
   
       23 . A flow state evaluating method as claimed in  claim 22 , wherein said third step includes estimating a density of said substance based on a spectrum of said radiation detected by said radiation detector and thereby evaluating the flow state of said volcanic magma.  
   
   
       24 . A flow state evaluating method as claimed in  claim 22 , wherein said third step includes quantitatively evaluating the flow state of said volcanic magma based on a generation quantity of said radiation detected by said radiation detector.  
   
   
       25 . An underground resources evaluating method as claimed in  claim 5 , wherein said third step includes quantitatively evaluating said underground resources based on a generation quantity of said radiation detected by said radiation detector.  
   
   
       26 . An underground resources evaluating method as claimed in  claim 6 , wherein said third step includes quantitatively evaluating said underground resources based on a generation quantity of said radiation detected by said radiation detector.  
   
   
       27 . An underground resources evaluating method as claimed in  claim 7 , wherein said third step includes quantitatively evaluating said underground resources based on a generation quantity of said radiation detected by said radiation detector.  
   
   
       28 . An underground resources evaluating method as claimed in  claim 8 , wherein said third step includes quantitatively evaluating said underground resources based on a generation quantity of said radiation detected by said radiation detector.  
   
   
       29 . An underground resources evaluating method as claimed in  claim 9 , wherein said third step includes quantitatively evaluating said underground resources based on a generation quantity of said radiation detected by said radiation detector.  
   
   
       30 . An underground waste evaluating method as claimed in  claim 12 , wherein said third step includes quantitatively evaluating said waste based on a generation quantity of said radiation detected by said radiation detector.  
   
   
       31 . An underground waste evaluating method as claimed in  claim 13 , wherein said third step includes quantitatively evaluating said waste based on a generation quantity of said radiation detected by said radiation detector. C 
   
   
       32 . An underground preserved object evaluating method as claimed in  claim 16 , wherein said third step includes quantitatively evaluating said preserved object based on a generation quantity of said radiation detected by said radiation detector.  
   
   
       33 . An underground preserved object evaluating method as claimed in  claim 17 , wherein said third step includes quantitatively evaluating said preserved object based on a generation quantity of said radiation detected by said radiation detector.  
   
   
       34 . A flow state evaluating method as claimed in  claim 23 , wherein said third step includes quantitatively evaluating the flow state of said volcanic magma based on a generation quantity of said radiation detected by said radiation detector.