Chemical amendments for the stimulation of biogenic gas generation in deposits of carbonaceous material

A method of stimulating biogenic production of methane, the method comprising:

• accessing microorganisms in an anaerobic geologic formation that includes a naturally formed in situ carbonaceous material;
• injecting molecular hydrogen to the geologic;
• and
• providing a phosphorous compound to the geologic formation,
• wherein the combination of the molecular hydrogen and the phosphorous compound stimulates the microorganisms to metabolize the carbonaceous material into the methane.

A method of stimulating biogenic production of a metabolic product with enhanced hydrogen content, the method comprising:

• accessing microorganisms in an anaerobic geologic formation that includes carbonaceous material;
• detecting a plateau in a concentration of the metabolic product with enhanced hydrogen from the first geologic formation that is indicative of a rollover effect;
• providing molecular hydrogen and a phosphorous compound to the geologic formation,
• wherein the molecular hydrogen and the phosphorous compound increase the concentration of the metabolic product with enhanced hydrogen content to a level greater than a rollover point where the rollover effect began to occur.