Effect of hydraulic fracture extension into sandstone on coalbed methane production

Zhou, Fengde, Chen, Zhixi and Rahman, Sheikh S. (2015) Effect of hydraulic fracture extension into sandstone on coalbed methane production. Journal of Natural Gas Science and Engineering, 22 459-467. doi:10.1016/j.jngse.2014.12.017

Author Zhou, Fengde
Chen, Zhixi
Rahman, Sheikh S.
Title Effect of hydraulic fracture extension into sandstone on coalbed methane production
Journal name Journal of Natural Gas Science and Engineering   Check publisher's open access policy
ISSN 1875-5100
Publication date 2015-01-01
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.jngse.2014.12.017
Open Access Status Not yet assessed
Volume 22
Start page 459
End page 467
Total pages 9
Place of publication Philadelphia, PA, United States
Publisher Elsevier
Language eng
Formatted abstract
Hydraulic fracturing is applied to stimulate low permeability coals by producing a conductive fracture that enhances the connectivity between a wellbore and coal reservoir. The extant literature suggests that hydraulic fractures (HFs) can be vertical or horizontal, and may sometimes extend to neighbouring aquifers. This paper presents a quantitative study, using numerical simulations with a compositional simulator, into the effect of HF direction and its connectivity with aquifer on coalbed methane (CBM) production. Results show that vertical HFs yield higher peak gas rates than horizontal HFs, assuming that the permeability and volume of HF zones are the same. The extension of a HF into an aquifer results in high water production; however, the cumulative gas production is similar to models where the HF is constrained in a coalbed and the volume of the aquifer is less than 1.79 × 106 m3. An increase in aquifer volume causes decreases in gas production, but increases in water production, in fact, the peak gas rate and cumulative gas production decreases logarithmically with the increase in aquifer volume. When HFs extend into aquifers, with a volume of at least 34.8 × 106 m3, both peak gas rates and cumulative gas production yields decrease, and there is 10 times more cumulative water production than is seen in models without HFs. The results of the numerical simulations used in the study are justified by the production performance of a well from a producing CBM field.
Keyword Coalbed methane
Gas production
Hydraulic fracture geometry
Numerical simulation
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Earth Sciences Publications
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Citation counts: TR Web of Science Citation Count  Cited 7 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 7 times in Scopus Article | Citations
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