Patent ID: 8138128

Claim:
A wellbore sealant composition comprising: a wellbore treatment fluid; a scintillator material; cement; and a comb polymer having anchoring groups and ionizable dispersing groups; wherein the scintillator material is capable of emitting secondary radiation upon exposure to the ionizing radiation and selected from the group consisting of LiF/ZnS:Ag, LiI:Eu, NaI:Tl + , Bi 4 Ge 3 O 12 (GSO), Gd 2 SiO 5 :Ce 3+ , ZnS:Ag, CsI, CaF 2 :Eu, GSO:Ce, YAl:CaTiO 3 :Ce, and combinations thereof; wherein the comb polymer is a polymer that crosslinks when exposed to ionizing radiation; and wherein the sealant composition is capable of thickening upon exposure to the ionizing radiation.