Corrosion-inhibiting bactericide for shale gas field

The invention discloses a corrosion-inhibiting bactericide for a shale gas field. The corrosion-inhibiting bactericide for the shale gas field is prepared from the following components in parts by weight: 2 to 16 parts of amido oligomer, 15 to 30 parts of aldehyde, 15 to 30 parts of tetrakis hydroxymethyl phosphonium sulfate, 2 to 5 parts of alkylphenol polyoxyethylene OP-10 and 40 to 63 parts ofwater, wherein the amido oligomer is copolymerized by acrylamide, sodium acrylate and alkyl allyl quaternary ammonium salt. Compared with the prior art, the corrosion-inhibiting bactericide has the characteristics that the lasting period is long, the usage amount is small, and the corrosion-inhibiting sterilizing effect is good; the corrosion-inhibiting bactericide can be used for the corrosion inhibiting and sterilizing of gas collecting pipelines and water pipelines for shale gas collection, and sterilizing and corrosion inhibiting of pressure test water and production water of oil gas fieldpipelines; the strong kil