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Impact of Well Stimulation on Coal Porosity of Malaysian Coals for Coalbed Methane (CBM) Study

Abdul Khalil, Amira Raihana (2013) Impact of Well Stimulation on Coal Porosity of Malaysian Coals for Coalbed Methane (CBM) Study. Universiti Teknologi Petronas. (Unpublished)

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Abstract

Coalbed methane (CBM) is an unconventional gas contained in coalbed reservoir. The character of this reservoir is fundamentally different to conventional gas plays because coal is almost pure carbon. Coalbed methane (CBM) wells usually have higher production rate at the beginning of methane production but over time it decreases until it reaches unprofitable level. Well stimulation is one way to solve this problem and this research studies acidizing technique for stimulating coalbed reservoir since there is lack of research done in acidizing of CBM reservoir. The main objective of this research is to observe the effect on porosity of Malaysian coals (still not declared as a CBM producer) before and after being stimulated by different acids that are sulfuric acid (H2SO4), hydrochloric acid (HCl) and nitric acid (HNO3). Several laboratory tests are performed to determine the porosity. The experiment starts by drying the coal samples in the oven for two hours and the weight for each sample is noted. Each sample is immersed in different acids with different volumes at constant temperature. After immersing the coal samples in acids for six hours, the samples are taken out for weight measurement. The experiment is repeated with different oven temperatures (500C and 1000C) for drying purposes. Upon completion of this research, a higher porosity is expected to be seen on Malaysian coal samples after acidizing job is done. So, it means that different acids have different effects on coal porosity value.

Item Type: Final Year Project
Academic Subject : Academic Department - Petroleum Geosciences - Petrophysics - Petrophysical data acquisition
Subject: T Technology > T Technology (General)
Divisions: Geoscience and Petroleum Engineering
Depositing User: Users 2053 not found.
Date Deposited: 19 Nov 2013 10:04
Last Modified: 25 Jan 2017 09:38
URI: http://utpedia.utp.edu.my/id/eprint/10691

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