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Preliminary Study on Gas Storage Capacity and Gas-in-Place for CBM Potential in Balingian Coalfield, Sarawak, Malaysia

Abstract - The objective of this project is to predict the Coal Bed Methane (CBM) potential in Balingian coalfield, Sarawak. The geological survey shows that this area is about 120 km2. One out of six blocks in Balingian area is picked as an area of interest for preliminary assessment. Liang for...

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Main Authors: Kong Chai Chen, Kong, Chow Weng Sum, Chow
Format: Conference or Workshop Item
Published: 2011
Subjects:
T Technology (General)
Online Access:http://eprints.utp.edu.my/6930/1/GPE022.pdf
http://eprints.utp.edu.my/6930/
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spelling my.utp.eprints.69302017-03-20T02:28:22Z Preliminary Study on Gas Storage Capacity and Gas-in-Place for CBM Potential in Balingian Coalfield, Sarawak, Malaysia Kong Chai Chen, Kong Chow Weng Sum, Chow T Technology (General) Abstract - The objective of this project is to predict the Coal Bed Methane (CBM) potential in Balingian coalfield, Sarawak. The geological survey shows that this area is about 120 km2. One out of six blocks in Balingian area is picked as an area of interest for preliminary assessment. Liang formation (Balingian Coal) is lignite coal with a mean vitrinite reflectance of 0.32%.The coal seam thickness is ranging from 0.33ft to 29.69ft. Based on the proximate analysis data from Geoscience and Mineral Department of Malaysia, the result show the moisture content is in between 12.9% to 18.7%. The volatile matter varies at 37.8% to 43.4%, whereas the fixed carbon ranges from 40.3% to 43.4%. The coal contains a very low ash content at mean of 2.7% and low sulphur content of less than 1%. Four core samples which were plugged from different coals have the range of porosity varies from 1.58% to 5.12%. Meanwhile, the permeability attained at minimum of 0.15mD to maximum of 46.15mD. Such a huge variation in porosity and permeability shows that they were due to the different number of cleat networks which were examined using PoroPerm. Gas storage capacity at different steps of pressure was determined from adsorption isotherm test which based on modified Boyle’s law. The result from the adsorption isotherm test showed the maximum adsorbed methane in the coal is 374.62scf/ton at maximum pressure of 1219.58psia. The linear regression of Langmuir Volume and Langmuir Volume showed 714.29scf/ton and 1024.5psia respectively. The value of maximum absorbed methane is used in gas-in-place calculation which yields 15.20Bscf in the area of 6.094km2. The result is then compared with other similar coal rank fields. As a conclusion, Balingian coal field showed a very good prospect to produce the first CBM in Malaysia based on this preliminary study. Keywords - Langmuir, gas storage capacity, CBM and gas-inplace 2011-09-19 Conference or Workshop Item NonPeerReviewed application/pdf http://eprints.utp.edu.my/6930/1/GPE022.pdf Kong Chai Chen, Kong and Chow Weng Sum, Chow (2011) Preliminary Study on Gas Storage Capacity and Gas-in-Place for CBM Potential in Balingian Coalfield, Sarawak, Malaysia. In: National Postgraduate Conference 2011 (NPC 2011), 19-20 Sept 2011, Universiti Teknologi PETRONAS, Tronoh, Perak, MALAYSIA. http://eprints.utp.edu.my/6930/
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Institutional Repository
url_provider http://eprints.utp.edu.my/
topic T Technology (General)
spellingShingle T Technology (General)
Kong Chai Chen, Kong
Chow Weng Sum, Chow
Preliminary Study on Gas Storage Capacity and Gas-in-Place for CBM Potential in Balingian Coalfield, Sarawak, Malaysia
description Abstract - The objective of this project is to predict the Coal Bed Methane (CBM) potential in Balingian coalfield, Sarawak. The geological survey shows that this area is about 120 km2. One out of six blocks in Balingian area is picked as an area of interest for preliminary assessment. Liang formation (Balingian Coal) is lignite coal with a mean vitrinite reflectance of 0.32%.The coal seam thickness is ranging from 0.33ft to 29.69ft. Based on the proximate analysis data from Geoscience and Mineral Department of Malaysia, the result show the moisture content is in between 12.9% to 18.7%. The volatile matter varies at 37.8% to 43.4%, whereas the fixed carbon ranges from 40.3% to 43.4%. The coal contains a very low ash content at mean of 2.7% and low sulphur content of less than 1%. Four core samples which were plugged from different coals have the range of porosity varies from 1.58% to 5.12%. Meanwhile, the permeability attained at minimum of 0.15mD to maximum of 46.15mD. Such a huge variation in porosity and permeability shows that they were due to the different number of cleat networks which were examined using PoroPerm. Gas storage capacity at different steps of pressure was determined from adsorption isotherm test which based on modified Boyle’s law. The result from the adsorption isotherm test showed the maximum adsorbed methane in the coal is 374.62scf/ton at maximum pressure of 1219.58psia. The linear regression of Langmuir Volume and Langmuir Volume showed 714.29scf/ton and 1024.5psia respectively. The value of maximum absorbed methane is used in gas-in-place calculation which yields 15.20Bscf in the area of 6.094km2. The result is then compared with other similar coal rank fields. As a conclusion, Balingian coal field showed a very good prospect to produce the first CBM in Malaysia based on this preliminary study. Keywords - Langmuir, gas storage capacity, CBM and gas-inplace
format Conference or Workshop Item
author Kong Chai Chen, Kong
Chow Weng Sum, Chow
author_facet Kong Chai Chen, Kong
Chow Weng Sum, Chow
author_sort Kong Chai Chen, Kong
title Preliminary Study on Gas Storage Capacity and Gas-in-Place for CBM Potential in Balingian Coalfield, Sarawak, Malaysia
title_short Preliminary Study on Gas Storage Capacity and Gas-in-Place for CBM Potential in Balingian Coalfield, Sarawak, Malaysia
title_full Preliminary Study on Gas Storage Capacity and Gas-in-Place for CBM Potential in Balingian Coalfield, Sarawak, Malaysia
title_fullStr Preliminary Study on Gas Storage Capacity and Gas-in-Place for CBM Potential in Balingian Coalfield, Sarawak, Malaysia
title_full_unstemmed Preliminary Study on Gas Storage Capacity and Gas-in-Place for CBM Potential in Balingian Coalfield, Sarawak, Malaysia
title_sort preliminary study on gas storage capacity and gas-in-place for cbm potential in balingian coalfield, sarawak, malaysia
publishDate 2011
url http://eprints.utp.edu.my/6930/1/GPE022.pdf
http://eprints.utp.edu.my/6930/
_version_ 1738655531783946240
score 13.211869

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