Patent attributes
A hydrocarbon recovery method for recovering a production fluid containing hydrocarbons from a production well provided in the ground in which Type 1 microorganisms that produce a biological membrane (biofilm) and Type 2 microorganisms that produce carbon dioxide for promoting deposition of calcium carbonate exist, the hydrocarbon recovery method includes injecting, into the production well, a culture medium for increasing the Type 1 microorganisms; injecting, into the production well, a composition used for the Type 2 microorganisms to produce carbon dioxide, decompressing an inside of the production well after the culture medium and the composition are injected, and recovering the hydrocarbons in a state where the inside of the production well is decompressed.
