Simulasi Pemanasan Gelombang Mikro Pada Reservoir Shale Gas Menggunakan Comsol Multiphysics

Lestari Yuliani, Novi (2022) Simulasi Pemanasan Gelombang Mikro Pada Reservoir Shale Gas Menggunakan Comsol Multiphysics. Other thesis, Universitas Islam Riau.

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Abstract

The development of unconventional oil, gas and gas condensate reservoirs over the past decade has gained tremendous momentum, especially for natural gas due to its low environmental impact and ease of transportation to distribution centers via pipelines. The shale gas reservoir has a very low matrix permeability and belongs to a group of natural fractures that are rich in minerals and organic deposition (crystallization). Experimental analysis of 152 cores from nine reservoirs in North America found that the mean permeability of the shale bedrock is 54 nd and approximately 90% has a permeability of less than 150 nd. Most of the pore diameters are concentrated in the range of 4-200 nm. Shale gas production can be achieved by the application of horizontal drilling and hydraulic fracturing technology. Hydraulic fracturing in shale gas wells usually uses large amounts of water and a small amount of additives as the fracturing fluid. After the hydraulic fracturing process, the circulation ratio of the fracture fluid is very low with an amount of about 50-90% of the fracture fluid retained in the reservoir. This can increase the water saturation of the formation and cause serious formation damage, such as water blocking. Formation Heat Treatment (FHT) has been shown to be effective in removing the aqueous phase and creating micro-cracks in the area near the wellbore. This study uses numerical simulations to determine the effect of microwave heating on reservoir quality improvement and its effect on gas production. The method used is simulation research using COMSOL multiphysis 5.6 software. The best frequency is to use a frequency of 5800 MHz. While at the frequency of 915 MHz the change in temperature is very small, for the frequency of 2450 MHz the temperature change is good but not as good as the frequency of 5800 MHz. It can be concluded that a higher microwave frequency produces a relatively higher temperature profile in a short time.

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