Abstract
Coal Bed Methane (CBM) is an unconventional resource that shows great promise, particularly in Indonesia, whose CBM reservoir is relatively thick. Gas reserves of CBM are estimated at 450 TSCF in Indonesia, which makes it, the 6th largest CBM-containing country in the world. However, regulatory and technical limitations slow the progression of the exploitation of this resource. One of the fundamental technical problems is related to the length of gas production due to the duration of the dewatering time. Many studies have been developed related to the production of CBM, and this paper discusses several characteristics, patterns and techniques regarding the production of methane gas from coal through the use of a sacrifice well. Several scenarios are analysed with the use of a simulator. The results show that the production of a thick CBM reservoir, with some sensitivity patterns of production through the use of a sacrifice well, have an influence on the production of gas and water for the exploitation of CBM resources. In other words, the use of new techniques that are discussed in this paper have an impact on reducing the dewatering time and are effectively implemented in Indonesia, which has thick CBM formations.
Highlights
Energy is a primary need of living things
The objective of this study is to determine the most effective and efficient Coal Bed Methane (CBM) production pattern, with the aim of decreasing the dewatering time, and because of that we propose a solution – that is, by applying a sacrifice well
The production of gas at a relatively fast rate and in large amounts is needed to offset the investment costs provided in the development and exploitation of CBM resources – for that, we will need significant technical development to take place
Summary
Energy is a primary need of living things. Rapid technological developments have led to the use or consumption of significantly increasing amounts of energy. Oil and natural gas have become one of the more preferred energy sources, for many reasons including that their use is instantaneous, easy to store, the level of hazard is relatively low compared to other sources such as nuclear, and that they are relatively abundant in various regions of the world. In recent decades oil and gas resources have declined in production in many parts of the world due to the increasing scarcity of giant reservoir resources. This is very much in contrast to the increasing demand for energy, forcing companies to find oil and gas reservoirs to compensate for this. This paper focusses on gas phase hydrocarbon resources, targeting unconventional natural or reservoir gases
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