NOVELTY - Enhancing biogenic methane production, involves introducing indiscriminate microbial population stimulation amendment to hydrocarbon-bearing formation with at least two microbial population, microbially consuming microbial populations stimulation amendment by microbial population, blanket boosting at least two microbial populations from microbial population stimulation amendment consumption, depleting the amendment, selectively reducing starved at least two boosted microbial population, generating methane from boosted microbial population, and collecting methane.    USE - For enhancing biogenic methane production (claimed).    ADVANTAGE - The method enables an efficient enhancement of biogenic methane production.    DETAILED DESCRIPTION - Enhancing biogenic methane production, involves providing a hydrocarbon-bearing formation having at least two microbial populations, introducing one or more indiscriminate microbial population stimulation amendment to the hydrocarbon-bearing formation having the at least two microbial populations, microbially consuming one or more indiscriminate microbial population stimulation amendment by the at least two microbial populations, blanket boosting the at least two microbial populations of the hydrocarbon-bearing formation from consumption of one or more indiscriminate microbial population stimulation amendment, microbially depleting one or more indiscriminate microbial population stimulation amendment, starving one or more at least two boosted microbial populations, selectively reducing the starved one or more at least two boosted microbial populations, selectively sustaining one or more boosted microbial population, generating methane from one or more boosted microbial population, and collecting the methane.    INDEPENDENT CLAIMS are included for the following:    (1) ex-situ enhancing biogenic methane production, involves extracting a hydrocarbon-bearing formation from subterranean source, placing the hydrocarbon-bearing formation in an ex-situ methane production environment, introducing one or more microbial population stimulation amendment to the ex-situ methane production environment containing the hydrocarbon-bearing formation, stimulating one or more microbial population of the extracted hydrocarbon-bearing formation with one or more microbial population stimulation amendment, generating methane from the stimulated microbial population, and collecting the methane;    (2) universal enhancement of biogenic methane production, involves providing a hydrocarbon-bearing formation, introducing one or more predetermined microbial population stimulation amendment to the hydrocarbon-bearing formation, stimulating one or more microbial population of the hydrocarbon-bearing formation with one or more predetermined microbial population stimulation amendment, generating methane from the stimulated microbial population, and collecting the methane;    (3) in-situ enhancing biogenic methane production, involves locating an oil shale formation having one or more microbial population stimulation amendment, fracturing the oil shale formation, delivering one or more microbial population stimulation amendment to one or more microbial population, stimulating one or more microbial population in the oil shale formation with one or more microbial population stimulation amendment, generating methane from one or more stimulated microbial population, and collecting the methane;    (4) a biogenic methane production system comprising hydrocarbon-bearing formation environment initially having at least two microbial populations, one or more indiscriminate microbial population stimulation amendment delivered to the hydrocarbon-bearing formation environment, one or more starved microbial population of at least two microbial populations, one or more sustained boosted microbial population of at least two microbial population, biogenically generated methane derived from one or more sustained boosted microbial population, and methane collection element;    (5) an ex-situ biogenic methane production system comprising an ex-situ methane production environment, hydrocarbon-bearing formation and one or more microbial population extracted from subterranean source in the ex-situ methane production environment, one or more introduced microbial population stimulation amendment in the ex-situ methane production environment, biogenically generated methane in the ex-situ methane production environment derived from one or more introduced microbial population stimulation amendment, and methane collection element;    (6) a universal biogenic methane production system comprising hydrocarbon-bearing formation environment having one or more microbial population, one or more introduced predetermined microbial population stimulation amendment in the hydrocarbon-bearing formation environment, biogenically generated methane derived from one or more introduced predetermined microbial population stimulation amendment in the hydrocarbon-bearing formation environment, and methane collection element; and    (7) an in-situ biogenic methane production system comprising an oil shale formation having one or more microbial population stimulation amendment, an oil shale formation fracture element, microbial population stimulation amendment delivery element to one or more microbial population, biogenically generated methane in the oil shale formation derived from one or more microbial population stimulation amendment and one or more microbial population, and methane collection element.    DESCRIPTION OF DRAWING(S) - The figure is a graph representing the percentage increase in the amount of methane by treatment on oil shale layer.