Method for preparation of coalbed methane from microorganisms

• Main Authors: XIA DAPING, LI SHUINAN, LUO YUAN, CHEN SHANLAI, BAI YANG, SI QING, XIANG DAOHUI, YANG YALEI
• Format: Patent
• Language: English
• Published: 18.11.2015
• Subjects: BEER; BIOCHEMISTRY; CHEMISTRY; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; ENZYMOLOGY; FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE; FIXED CONSTRUCTIONS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; MICROBIOLOGY; MINING; MUTATION OR GENETIC ENGINEERING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; SPIRITS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; VINEGAR; WINE

The invention discloses a method for preparation of coalbed methane from microorganisms. The method includes the steps of: (1) screening hydrogenogens and acidophilic methanogens; (2) domesticating related bacteria; (3) conducting bacteria enrichment to make a liquid A; (4) adding the liquid A successively according to coalbed methane well on-site parameters; and (5) selecting a main directional drilled hole and two subsidiary directional drilled holes from directional drilled holes of the coalbed methane well to conduct data monitoring. The mixed bacteria fermented biological fracturing fluid has certain sand-carrying ability, wherein the bacteria have hydrogen and methane producing ability, not only can increase the permeability of coal reservoir, increase coalbed gas resources, but also can realize automatic viscosity reduction, and is in favor of flowback. After flowback, the residual hydrogen and methane producing bacteria can continue transformation to the coal reservoir, and can produce endless streams of biogenic coal-bed methane. The method provided by the invention enhances the success rate of dead well resurrection to a large extent, and also the method for preparation of coalbed methane can also be used for biological exploitation of goaf residual coal.