Patent ID: 9068107
Filing Date: 2015-06-30
Classification: C09K,C12P,Y02E

Abstract:
1. A process for stimulating microbial methane production in a petroleum-bearing subterranean formation, in which a microbial consortium comprising at least one methanogenic microorganism and one or more methanotrophic microorganisms are present, comprising: (a) analyzing one or more components of the formation to determine characteristics of the formation environment; (b) detecting the presence of the microbial consortium, comprising at least one methanogenic microorganism, within the formation; (c) assessing whether the formation microorganisms are currently active; (d) determining that the microbial consortium comprises one or more methanotrophic microorganisms, and assessing whether said one or more methantrophic microorganisms are active; (e) characterizing one or more microorganisms of the consortium, at least one of the members of the consortium being a methanogenic microorganism, and comparing the members of the consortium with at least one known microorganism having one or more known physiological and ecological characteristics; (f) characterizing one or more methanotrophic microorganisms of the consortium, and comparing the members of the consortium with at least one known microorganism having one or more known physiological and ecological characteristics; (g) using information obtained from steps (a) through (e) for determining an ecological environment that promotes in situ microbial degradation of petroleum and promotes microbial generation of methane by at least one methanogenic microorganism of the consortium; (h) using information obtained from steps (a) and (f) for determining an ecological environment that demotes in situ microbial degradation of methane by at least one methanotrophic microorganism of the consortium; and (i) modifying the formation environment based on the determinations of steps (g) and (h) to stimulate microbial conversion of petroleums to methane while minimizing methane destruction by adverse processes.