An experimental study on characterizing coal bed methane (CBM) fines production and migration of mineral matter in coal beds

Massarotto, Paul, Iyer, R. S., Elma, Muthia and Nicholson, Timothy (2014) An experimental study on characterizing coal bed methane (CBM) fines production and migration of mineral matter in coal beds. Energy and Fuels, 28 2: 766-773. doi:10.1021/ef401098h


Author Massarotto, Paul
Iyer, R. S.
Elma, Muthia
Nicholson, Timothy
Title An experimental study on characterizing coal bed methane (CBM) fines production and migration of mineral matter in coal beds
Journal name Energy and Fuels   Check publisher's open access policy
ISSN 0887-0624
1520-5029
Publication date 2014-02-20
Year available 2013
Sub-type Article (original research)
DOI 10.1021/ef401098h
Open Access Status Not Open Access
Volume 28
Issue 2
Start page 766
End page 773
Total pages 8
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Abstract Drilling through coal beds and high initial fluid production rates can lead to shear and compressive failure of coal, resulting in the creation of coal fines. In overbalanced drilling, these fines mix with the drilling fluid and are carried into the near-wellbore zone. During initial water production, the fines are transported to the producing wellbore through the coal beds. Both transport processes result in blocked cleats and pores in the near-wellbore, high-pressure drop zone, reducing permeability and lowering production rates of gas and water. Excessive fines production will also lead to excessive wear and plugging of equipment. The objective of this study was to characterize a set of coal fines from a coal bed methane (CBM) field, with the aim of understanding their origin and character toward their effective management in the field. This study focused on fines originating from horizontal and vertical wells drilled in the Moranbah CBM field in Queensland, Australia, where the horizontal drilling process was suspected of creating excessive fines. We divided this study into two parts; in the first, we prepared fines from four different coal cores sourced from a nearby vertical well and characterized them. In the second, field fines collected over time from vertical wells connected to horizontal wells were characterized, with a novel technique called comparative quantitative X-ray diffraction (CQ-XRD) to establish organic-to-mineral ratios. We also report on key differences in CQ-XRD-derived mineralogy between field fines and core-derived lab fines; changes to particle size and helium-derived density over time; petrography and proximate ash yield of the four cores; and comparisons in water properties of field formation water with lab leachate water.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2014 Collection
 
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