scholarly journals New Technique to Accelerate Gas Production on CBM Through Use of Sacrifice Well

2017 ◽  
Vol 12 (1) ◽  
pp. 86
Author(s):  
Leksono Mucharam ◽  
Silvya Rahmawati ◽  
Rafael Purba
Keyword(s):  
Gas Production ◽  
New Technique ◽  
Coal Bed ◽  
Coal Bed Methane ◽  
Great Promise ◽  
New Techniques ◽  
Technical Problems ◽  
Methane Gas ◽  
The World ◽  
Unconventional Resource

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.

A Comprehensive Review on CO2/N2 Mixture Injection for Methane Gas Recovery in Hydrate Reservoirs

2021 ◽  
Author(s):  
Azeez Gbenga Aregbe ◽  
Ayoola Idris Fadeyi
Keyword(s):  
Carbon Dioxide ◽  
Gas Production ◽  
Gas Mixture ◽  
Methane Gas ◽  
Gas Recovery ◽  
Oceanic Sediments ◽  
Replacement Process ◽  
The World ◽  
Gas Molecules ◽  
Hydrate Reservoirs

Abstract Clathrate hydrates are non-stoichiometric compounds of water and gas molecules coexisting at relatively low temperatures and high pressures. The gas molecules are trapped in cage-like structures of the water molecules by hydrogen bonds. There are several hydrate deposits in permafrost and oceanic sediments with an enormous amount of energy. The energy content of methane in hydrate reservoirs is considered to be up to 50 times that of conventional petroleum resources, with about 2,500 to 20,000 trillion m3 of methane gas. More than 220 hydrate deposits in permafrost and oceanic sediments have been identified to date. The exploration and production of these deposits to recover the trapped methane gas could overcome the world energy challenges and create a sustainable energy future. Furthermore, global warming is a major issue facing the world at large and it is caused by greenhouse gas emissions such as carbon dioxide. As a result, researchers and organizations have proposed various methods of reducing the emission of carbon dioxide gas. One of the proposed methods is the geological storage of carbon dioxide in depleted oil and gas reservoirs, oceanic sediments, deep saline aquifers, and depleted hydrate deposits. Studies have shown that there is the possibility of methane gas production and carbon dioxide storage in hydrate reservoirs using the injection of carbon dioxide and nitrogen gas mixture. However, the conventional hydrocarbon production methods cannot be used for the hydrate reservoirs due to the nature of these reservoirs. In addition, thermal stimulation and depressurization are not effective methods for methane gas production and carbon sequestration in hydrate-bearing sediments. Therefore, the gas replacement method for methane production and carbon dioxide storage in clathrate hydrate is investigated in this paper. The research studies (experiments, modeling/simulation, and field tests) on CO2/N2 gas mixture injection for the optimization of methane gas recovery in hydrate reservoirs are reviewed. It was discovered that the injection of the gas mixture enhanced the recovery process by replacing methane gas in the small and large cages of the hydrate. Also, the presence of N2 molecules significantly increased fluid injectivity and methane recovery rate. In addition, a significant amount of free water was not released and the hydrate phase was stable during the replacement process. It is an effective method for permanent storage of carbon dioxide in the hydrate layer. However, further research studies on the effects of gas composition, particle size, and gas transport on the replacement process and swapping rate are required.

scholarly journals Exploration in the Netherlands, 1987-2012

2012 ◽  
Vol 91 (4) ◽  
pp. 403-418 ◽  
Author(s):  
H. Kombrink ◽  
J.H. ten Veen ◽  
M.C. Geluk
Keyword(s):  
The Netherlands ◽  
Shale Gas ◽  
Geothermal Energy ◽  
Oil Industry ◽  
Coal Bed ◽  
Coal Bed Methane ◽  
Shallow Gas ◽  
New Techniques ◽  
Deep Geothermal Energy ◽  
Salt Mining

AbstractFollowing a time of expansion of the oil industry, the period 1987-2012 and especially the second half of it reflects a diversification of exploration activities in the Netherlands. In addition to the ongoing discovery of classical hydrocarbon reservoirs, successful attempts have been made to explore deep geothermal energy. Shale gas and Coal Bed Methane received interest in the Netherlands too but so far no wells have been drilled in order to test the potential. Storage of gas and liquids has been introduced and salt mining more or less continued without many changes. In terms of drilling activity, the last 25 years show a decreasing trend and the discovered volumes are smaller. Testing of new play concepts was either successful (shallow gas) or not (Dinantian) and sometimes an unexpected discovery was made (Triassic Fat Sands). New techniques proved older fields to be exploitable again, e.g. redevelopment of the Schoonebeek Field. Therefore, despite a decline in number of wells drilled and reserves added, the diversification of use of the subsurface will guarantee ongoing exploration.

Coal Particles Cleanout Technology in Coal Bed Methane Wells

2012 ◽  
Vol 229-231 ◽  
pp. 2470-2473 ◽  
Author(s):  
Bing Liu ◽  
Yao Guang Qi ◽  
Chao Wang ◽  
Chun Cheng Xu ◽  
Fen Na Zhang ◽  
...  
Keyword(s):  
High Efficiency ◽  
New Technology ◽  
Gas Production ◽  
Coal Bed ◽  
Working Fluid ◽  
Coal Bed Methane ◽  
Skin Damage ◽  
Technology System ◽  
Coal Particles ◽  
Continuous Vacuum

Coal particles cleanout which is regarded as the key technology in the operation of coal bed methane (CBM) wells, play an important part in making steady production. In oil wells, Sand cleanout is operated by circulating a liquid or a multiphase fluid into the wellbore to bring sand particles to the surface. Although the sand cleanout operations have been applied successfully in most wells with high efficiency and negligible leakage, it would leak working fluid into coal bed formation, destroy the structure of coal bed and jam the formed channel of gas production. In this paper, a new continuous vacuum cleanout technology has been developed to effectively remove coal particles in CBM wells by employing a jet pump. The Concentric Tubing String (CTS) which is assembled by 3.5 inch tubing and 1.5 inch tubing is also introduced in, because there is no CCT technology in China at the moment. Detailed structure and principle of the coal particles cleanout technology system are described, while a theoretical model is formulated to optimally design the system based on the coal particles settling experimental data and jet pumping theory. It has been shown from field applications that the coal particles cleanout technology makes significant improvements in achieving high efficiency and preventing leakage in CBM wells. Moreover, the new technology reduces the skin damage and increase the production compared to non-vacuum CBM wells.

scholarly journals Analysis on Production of Coal Bed Methane Considering the Change in Permeability of Coal Rock

2016 ◽  
Vol 9 (1) ◽  
pp. 289-298 ◽  
Author(s):  
Zhu Likai ◽  
Ji Youjun ◽  
Yang Tianhong ◽  
Li Xiaoyu
Keyword(s):  
Coal Mine ◽  
Confining Pressure ◽  
Gas Production ◽  
Coal Bed ◽  
Coal Bed Methane ◽  
Methane Extraction ◽  
Coal Rock ◽  
Cbm Production ◽  
Stable Yield ◽  
Set Up

Based on the mechanism of migration of the coal bed methane (CBM), and taking into account the deformation of the coal rock during the process of CBM production was also taken into account, a coupled mathematical model considering the interaction of solid and fluid for methane extraction was built. The coal gas extraction of JINcheng coal mine was taken as an example, some typical coal sample was chosen to test the permeability under different confining pressure. The curve for permeability of coal rock versus effective stress under different confining pressure was obtained, a numerical model considering the variation of permeability for methane extraction was set up. The influence of deformation of coal rock on the gas production was simulated and analyzed. The simulation results indicate that the productivity curve considering deformation of rock is closer to the actual production data, at the initial stage of production, the gas rate is less than the case without considering deformation of rock, but the time of stable yield will last longer, and this matches the actual methane extraction, therefore, we recommend that the deformation of coal seam should be considered during the prediction of methane production for JINcheng coal mine.

Peak Gas Production Analysis and Influencing Factors Study of Coal Bed Methane Well

2014 ◽  
Vol 1030-1032 ◽  
pp. 1388-1393 ◽  
Author(s):  
Wei Ding ◽  
Hua Chao Sun ◽  
Zhao Hui Xia ◽  
Yun Peng Hu ◽  
Qiang Fu Kong ◽  
...  
Keyword(s):  
Influencing Factors ◽  
Gas Production ◽  
Gas Content ◽  
Coal Bed ◽  
Coal Bed Methane ◽  
Gas Field ◽  
Gas Saturation ◽  
Desorption Time ◽  
Study Results ◽  
Cleat Porosity

The value of peak gas production and the time when it reaches are two important marks for coal bed methane (CBM) well’s gas production curve. This paper takes M CBM gas field of A country’s B basin as actual production instance. Firstly, based on the CBM producing mechanism, the existence reason of peak gas rate is analyzed; secondly, the influencing factors of the value of peak gas production and the time when it reaches is studied by numerical simulation method. And sensitivity order of the influencing factors is obtained. The study results indicate that: the value of peak gas production has positive correlation with properties: permeability, gas content, coal bed net pay and gas saturation; while negative correlation with desorption time and cleat porosity. And the strong to weak intensity of sensitivity is permeability, gas content, desorption time, net coal bed pay, cleat porosity, gas saturation. The time when peak gas production reaches is markedly influenced by the value desorption time and cleat porosity, the smaller of the two parameters, the shorter of the time when peak gas production reaches.

scholarly journals INDONESIA CBM DEVELOPMENT CHALLENGES AND OPPORTUNITIES

1970 ◽  
Vol 1 (1) ◽  
pp. 53-61
Author(s):  
Siti Sumilah Rita Susilawati ◽  
Hadiyanto Hadiyanto
Keyword(s):  
Alternative Energy ◽  
World Market ◽  
Coal Bed ◽  
Coal Bed Methane ◽  
Oil Reserves ◽  
High Dependency ◽  
The World ◽  
Challenges And Opportunities ◽  
Gas Coal

The increasing price of oil in the world market andthe depleted national oil reserves while on the otherhand there is a high dependency on oil as nationalmain source of energy, promote the development ofnew energy alternative in Indonesia. Apart from oil,Indonesia is also known to have contained enormousresources of conventional gas, coal, hydropower andgeothermal. Furthermore due to its significant coalresources, coal bed methane becomes one of the newpromising alternative energy in Indonesia.

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