Electropositive organic-inorganic composite material as well as preparation method and application thereof

The invention relates to the technical field of oil field drilling, and discloses an electropositive organic-inorganic composite material and a preparation method and application thereof.The composite material comprises a polymer and modified double-metal hydroxide, the modified double-metal hydroxide is layered double-metal hydroxide with organic anions as intercalation, and the organic anions are shown in the formula (1). Wherein the polymer comprises a structural unit a as shown in a formula (2), a structural unit b as shown in a formula (3), HO-R1-SO3-as shown in a formula (1) and # imgabs0 #, R1 is selected from C1-C6 linear chain or branched chain alkylene, and R2, R3, R4, R5, R6, R7 and R8 are respectively and independently hydrogen or C1-C10 linear chain or branched chain alkyl; wherein the layered double hydroxides are selected from magnesium-aluminum type layered double hydroxides. The electropositive organic-inorganic composite material prepared by the invention is used as a drilling fluid shale in