RU97106034A - METHOD FOR EXTRACTION OF METHANE FROM COAL LAYER - Google Patents

METHOD FOR EXTRACTION OF METHANE FROM COAL LAYER

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Publication number
RU97106034A
RU97106034A RU97106034/03A RU97106034A RU97106034A RU 97106034 A RU97106034 A RU 97106034A RU 97106034/03 A RU97106034/03 A RU 97106034/03A RU 97106034 A RU97106034 A RU 97106034A RU 97106034 A RU97106034 A RU 97106034A
Authority
RU
Russia
Prior art keywords
methane
substance
reservoir
formation
coal
Prior art date
Application number
RU97106034/03A
Other languages
Russian (ru)
Other versions
RU2121062C1 (en
Inventor
А.Е. Воробьев
С.В. Сластунов
А.А. Шилов
Original Assignee
Московский государственный горный университет
Filing date
Publication date
Application filed by Московский государственный горный университет filed Critical Московский государственный горный университет
Priority to RU97106034A priority Critical patent/RU2121062C1/en
Priority claimed from RU97106034A external-priority patent/RU2121062C1/en
Application granted granted Critical
Publication of RU2121062C1 publication Critical patent/RU2121062C1/en
Publication of RU97106034A publication Critical patent/RU97106034A/en

Links

Claims (2)

1. Способ извлечения метана из угольного пласта, включающий бурение скважин с поверхности, нагнетание в пласт рабочей жидкости в режиме гидрорасчленения, выдержку ее в пласте и оттеснение из фильтрующих трещин путем нагнетания в пласт воздуха с последующим извлечением метана при его самоистечении, отличающийся тем, что после завершения процесса самоистечения метана из угольного пласта в последний закачивают вещество с большей, чем у метана сорбционной способностью в объеме, определяемом из следующего выражения:
Figure 00000001

где l - длина раскрытых при гидрорасчленении трещин, м;
h - мощность пласта или свиты пластов, м;
mф - фильтрующая пористость пласта (на момент закачивания десорбирующего метан вещества);
К1 - коэффициент, учитывающий потери вещества из угольного массива (1,2 - 1,8);
Тв - температура закачиваемого вещества, град;
Z - коэффициент сверхсжимаемости вещества (0,9 - 0,95);
Рб - барометрическое давление, МПа;
Т0 - начальная температура пласта, oC;
Рзак. - давление закачиваемого вещества, МПа,
затем выдерживают это вещество в пласте до прекращения процесса десорбции метана из угля, после чего метан выводят через одну из скважин.1. The method of extracting methane from a coal seam, including drilling wells from the surface, injecting the working fluid into the reservoir in the mode of hydraulic separation, keeping it in the reservoir and pushing it out of the filter cracks by injecting air into the reservoir, followed by methane extraction during its self-discharge, characterized in that after completion of the process of methane self-discharge from a coal seam, a substance is injected into the latter with a sorption capacity greater than that of methane in a volume determined from the following expression:
Figure 00000001

where l is the length of the cracks uncovered during hydrodividing, m;
h is the thickness of the formation or formation, m;
m f - filtering porosity of the formation (at the time of injection of the desorbing methane substance);
K 1 - coefficient taking into account the loss of matter from the coal mass (1.2 - 1.8);
T in - the temperature of the injected substance, degrees;
Z is the coefficient of supercompressibility of the substance (0.9 - 0.95);
R b - barometric pressure, MPa;
T 0 - the initial temperature of the reservoir, o C;
P Zak. - pressure of the injected substance, MPa,
then this substance is kept in the formation until the process of desorption of methane from coal ceases, after which methane is removed through one of the wells. 2. Способ по п.1, отличающийся тем, что в угольный пласт закачивают двуокись углерода. 2. The method according to claim 1, characterized in that carbon dioxide is pumped into the coal seam.
RU97106034A 1997-04-15 1997-04-15 Method of withdrawal of methane from coal bed RU2121062C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU97106034A RU2121062C1 (en) 1997-04-15 1997-04-15 Method of withdrawal of methane from coal bed

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU97106034A RU2121062C1 (en) 1997-04-15 1997-04-15 Method of withdrawal of methane from coal bed

Publications (2)

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RU2121062C1 RU2121062C1 (en) 1998-10-27
RU97106034A true RU97106034A (en) 1999-04-20

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Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8256282B2 (en) 2007-07-19 2012-09-04 Schlumberger Technology Corporation In situ determination of critical desorption pressures
CN101963066A (en) * 2010-03-03 2011-02-02 北京鑫源九鼎科技有限公司 Method for drawing out methane from bedding plane of coal seam by hydraulic fracturing
RU2447290C1 (en) * 2010-11-11 2012-04-10 Закрытое акционерное общество "Инконко" Method for degassing of coal beds
RU2562353C2 (en) * 2011-06-10 2015-09-10 ООО "Научно-производственная компания "ТехСервис" Method to extract methane from coal bed
RU2520669C1 (en) * 2013-03-12 2014-06-27 Федеральное государственное бюджетное учреждение науки Институт горного дела им. Н.А. Чинакала Сибирского отделения Российской академии наук Coal seam degassing
CN103195467B (en) * 2013-04-02 2015-02-25 重庆市能源投资集团科技有限责任公司 Hydraulic fracturing and grouting solidification combined rock cross-cut coal uncovering method
CN103291354B (en) * 2013-05-20 2015-06-10 中国矿业大学 Filling and reinforcing method for floor roadway cross-layer pressure-relief borehole
CN106812532A (en) * 2016-03-30 2017-06-09 六盘水师范学院 A kind of coal petrography of high gas and outburst mine girdle half cuts top tunnel speedy drivage system
CN106869895A (en) * 2017-04-07 2017-06-20 中国石油大学(华东) A kind of thing mould preparation method of indoor coal petrography hydraulic fracturing cement sheath destruction
CN108590739B (en) * 2018-04-11 2019-10-29 中国平煤神马能源化工集团有限责任公司 A kind of prominent tunnel regionality energy divides source to control anti-burst method
CN111335938A (en) * 2020-03-19 2020-06-26 中煤科工集团重庆研究院有限公司 Coal rock solidifying rock cross-cut coal uncovering method
CN112664259A (en) * 2020-12-23 2021-04-16 中国矿业大学 Trinity comprehensive outburst prevention method for high outburst coal seam

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