Abstract: Methods of conditioning a carbonaceous material in a subterranean geologic formation for metabolism into a compound with enhanced hydrogen content by a microorganism consortium are described. The methods may include the steps of accessing the subterranean geologic formation through an access point, and contacting the carbonaceous material with a surfactant. The microorganism consortium can utilize the surfactant as a first nutrient source. The surfactant also increases accessibility of the carbonaceous material as a second nutrient source for the microorganism consortium. The microorganism consortium metabolizes the carbonaceous material into the compound with the enhanced hydrogen content.

Abstract: Methods of stimulating biogenic production of a metabolic product with enhanced hydrogen content are described. The methods may include accessing a geologic formation that includes carbonaceous material. The methods may also include introducing an amendment to the geologic formation. The amendments may further include removing compounds with enhanced hydrogen content from the formation.