Experimental analysis of adsorption capacities and behaviors of shale samples

Download
2013
Merey, Şükrü
In recent years, unconventional reserves such as shale gas reservoirs have become a major alternative source of energy in the world. It is known that Turkey has shale gas potentials especially in the Southeastern and Thrace region. In shale gas reservoirs, significant amounts of natural gas exist as conventional “free” gas in porous spaces as well as “adsorbed” gas on shale matrix. Understanding adsorption capacities and behaviors of shale gas reservoirs may help exploitation and resource evaluation. In this study, experimental adsorption measurements for shale samples obtained from different shale gas reservoirs in Turkey were conducted at various pressures and temperatures by using pure methane and pure carbon dioxide. It was shown that the effects of temperature and pressure on adsorption are very important. Matlab programs for Ono-Kondo monolayer model, Ono-Kondo three layer model and Ono-Kondo model for binary mixtures of methane and carbon dioxide were written in this study. By using Langmuir model and Matlab programs for Ono-Kondo models, experimental adsorption results were evaluated and adsorption isotherms were constructed. The advantages and disadvantages of these models were compared. It was concluded that Ono-Kondo monolayer model is thoroughly capable to fit adsorption isotherms of shale samples. By using Ono-Kondo monolayer model data, absolute adsorption values were calculated for all adsorption experiments. By conducting carbon dioxide adsorption experiments on shale samples in this study, it was shown that carbon dioxide might be stored in depleted shale gas reservoirs. In this study, initial shale gas-in place equation that uses Langmuir model were modified for Ono-Kondo monolayer model, and then initial-gas in place calculations for unit weight of shale deposits were done. It was shown that shale gas-in place equation proposed in this study is a good alternative for most accurate shale gas-in place calculations.

Suggestions

Quantification of the uncertainties in shale gas reservoirs, a case study for Dadas shale formation
Topçu, Görkem Yusuf; Akın, Serkan; Department of Petroleum and Natural Gas Engineering (2013)
In the world of a decreasing conventional oil and gas resources and high energy prices, the unconventional gas resources has become a new focus of interest of the oil and gas industry. Especially, after the American shale gas revolution, both the industry and the economies are trying to explore and exploit their potential resources. Also, Turkey is one of the lucky countries that are known to have important shale gas resources at subsurface. Up to date, Dadas shale formation in the Southeastern Anatolian ba...
Assessing uncertainties and managing risks in shale gas projects
Tuğan, Murat Fatih; Sınayuç, Çağlar; Department of Petroleum and Natural Gas Engineering (2017)
New millennium’s oil industry met the production from shale oil and shale gas formations as a revolution, a game changer which certainly have taken attention of most investors. However, shale oil and shale gas projects generally have marginal economics, hence should be carefully analyzed from the economic standpoint. To analyze the economics of a shale oil or shale gas play, generating an economically recoverable resource (ERR) probability function showing the full uncertainty range is highly important. Fur...
Shale Gas: Current Perspectives and Future Prospects in Turkey and the World
Kök, Mustafa Verşan (2014-11-17)
With the increased natural gas prices and advancement in the horizontal drilling and hydraulic fracturing technology, there is a high interest in shale gas reservoirs in the world and in Turkey. However, gas production from shale gas reservoirs is quite different than conventional gas reservoirs because permeability in shale gas reservoirs is very low and production mechanism is different due to adsorbed gas and free gas together in these reservoirs. The aim of study is to clarify shale gas reservoirs in te...
Critical evaluation of the energy resources of Turkey with respect to the world prospects
Aydemir, Mehmet Olcay; Mehmetoğlu, Mustafa Tanju; Department of Petroleum and Natural Gas Engineering (2010)
Existing petroleum and natural gas reserves, which are the major supplies of primary energy demand of the world, are cumulated in a few countries. This causes a serious supply security problem for many countries. On the other side, greenhouse gas emissions caused by mainly fossil fuels are gradually increasing to a point which jeopardizes the future of the earth. By now, countries have to consider both their supply security and this global environmental problem while planning their energy future. For Turkey...
Novel investigation of pyrolysis mechanisms and kinetics for functional groups in biomass matrix
Liu, Ruijia; Liu, Guijian; Yousaf, Balal; Niu, Zhiyuan; Abbas, Qumber (2022-01-01)
Biomass, as a renewable and sustainable energy resource, can be converted into environmentally friendly and practically valuable biofuels and chemical materials via pyrolysis. However, the process optimization and pyrolysis efficiency are restricted by the limited perception of the complicated mechanisms and kinetics for biomass pyrolysis. Here, to establish an in-depth mechanism model for biomass pyrolysis, we presented a novel investigation for the thermal evolutions and pyrolysis kinetics of the function...
Citation Formats
Ş. Merey, “Experimental analysis of adsorption capacities and behaviors of shale samples,” M.S. - Master of Science, Middle East Technical University, 2013.