Tagged chemical diverter

Abstract

The present disclosure provides methods for identifying chemical diverter material placed in a borehole region and provides chemical diverter material. In one embodiment, a method for detecting diverter material placed in a borehole region includes (a) obtaining a first data set by: emitting pulses of neutrons from the pulsed neutron source into the borehole region and detecting capture gamma rays resulting from nuclear reactions in the borehole region; (b) placing a diverter material comprising aqueous-swellable particles and a thermal neutron absorbing material into the borehole region; (c) obtaining a second data set by: emitting pulses of neutrons from the first pulsed neutron source or a second pulsed neutron source into the borehole region, and detecting capture gamma rays in the borehole; and (d) comparing the first data set and the second data set to determine the location of diverter material placed in the borehole region.

What is claimed is: 
     
         1 . A diverter material comprising:
 an aqueous-swellable particle; and   a thermal neutron absorbing material.   
     
     
         2 . The diverter material of  claim 1 , wherein the thermal neutron absorbing material is coated on the aqueous-swellable particle. 
     
     
         3 . The diverter material of  claim 1 , wherein the thermal neutron absorbing material is infused into the aqueous-swellable particle. 
     
     
         4 . The diverter material of  claim 1 , wherein the thermal neutron absorbing material comprises gadolinium, boron carbide, or samarium or any combinations thereof. 
     
     
         5 . The diverter material of  claim 4 , wherein the diverter material comprises the thermal neutron absorbing material from about 0.01 wt % to about 10 wt % based on the total weight of the diverter material. 
     
     
         6 . The diverter material of  claim 5 , wherein the aqueous-swellable particles are selected from the group consisting of anhydrous boric oxide, anhydrous sodium borate, sodium perborate monohydrate, sodium perborate trihydrate, and combinations thereof. 
     
     
         7 . The diverter material of  claim 1 , wherein the aqueous-swellable particles have an average size of from about 150 mesh to about 8 mesh. 
     
     
         8 . The diverter material of  claim 5 , wherein the aqueous-swellable particles are independently selected from sodium or potassium salt of polyacrylic acid or alginic acid, polyacrylate-cellulose graft copolymer, collagen, chitin, chitosan, dextran, carboxymethyldextran, starch, modified starch, hydroxyethyl starch, hydrolyzed polyacrylonitrile, starch-methacrylonitrile polymer, polyacrylamide, hydrolyzed polyacrylamide, carboxymethylcellulose, and derivatives thereof. 
     
     
         9 . The diverter material of  claim 1 , further comprising proppant particles, wherein the thermal neutron absorbing material is incorporated into the proppant particles. 
     
     
         10 . A diverter material comprising:
 a degradable material; and   a thermal neutron absorbing material.   
     
     
         11 . The diverter material of  claim 10 , wherein the thermal neutron absorbing material is blended with the thermal neutron absorbing material. 
     
     
         12 . The diverter material of  claim 10 , further comprising aqueous-swellable particles, wherein the thermal neutron absorbing material is infused into the aqueous-swellable particles. 
     
     
         13 . The diverter material of  claim 10 , further comprising proppant particles, wherein the thermal neutron absorbing material is incorporated into the proppant particles. 
     
     
         14 . The diverter material of  claim 10 , wherein the thermal neutron absorbing material comprises gadolinium, boron carbide, or samarium or any combinations thereof. 
     
     
         15 . The diverter material of  claim 14 , wherein the diverter material comprises the thermal neutron absorbing material from about 0.01 wt % to about 10 wt % based on the total weight of the diverter material. 
     
     
         16 . The diverter material of  claim 12 , wherein the aqueous-swellable particles are selected from the group consisting of anhydrous boric oxide, anhydrous sodium borate, sodium perborate monohydrate, sodium perborate trihydrate, and combinations thereof. 
     
     
         17 . The diverter material of  claim 12 , wherein the aqueous-swellable particles have an average size of from about 150 mesh to about 8 mesh. 
     
     
         18 . The diverter material of  claim 12 , wherein the aqueous-swellable particles are independently selected from sodium or potassium salt of polyacrylic acid or alginic acid, polyacrylate-cellulose graft copolymer, collagen, chitin, chitosan, dextran, carboxymethyldextran, starch, modified starch, hydroxyethyl starch, hydrolyzed polyacrylonitrile, starch-methacrylonitrile polymer, polyacrylamide, hydrolyzed polyacrylamide, carboxymethylcellulose, and derivatives thereof. 
     
     
         19 . The diverter material of  claim 10 , wherein the degradable material comprises degradable polymers, dehydrated compounds, and mixtures thereof. 
     
     
         20 . The diverter material of  claim 10 , wherein the degradable polymers are selected from the group consisting of polysaccharides, dextran, cellulose, chitin, chitosan, proteins, aliphatic polyesters, poly(lactide), poly(glycolide), poly(ε-caprolactone), poly(hydroxyhutyrate), poly(anhydrides), aliphatic polycarbonates, poly(ortho esters), poly(amino acids), poly(ethylene oxide), polyphosphazenes, polyanhydrides, poly(adipic anhydride), poly(suberic anhydride), poly(sebacic anhydride), poly(dodecanedioic anhydride), poly(maleic anhydride), and poly(benzoic anhydride and combinations thereof.