ANALYSIS OF PORE STRUCTURE CHANGES IN INDONESIA CARBONATE ROCKS DUETO CO2 INJECTION
CO2 emissions in the atmosphere can be reduced by the CCS method (Carbon Capture and Storage). CCS is a method of injecting CO2 into deep and permeable geological reservoirs, like carbonate reservoirs. This study aims to analyze chemical reactions and changes in the structure of the pores before...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/76494 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | CO2 emissions in the atmosphere can be reduced by the CCS method (Carbon Capture
and Storage). CCS is a method of injecting CO2 into deep and permeable geological
reservoirs, like carbonate reservoirs. This study aims to analyze chemical reactions and
changes in the structure of the pores before and after the injection of CO2 into the
carbonate rocks of Indonesia. The injection of CO2 into the carbonate rock is done by
immersing the rock in a solution of carbonate acid (H2CO3) for several time variations,
namely 3 days, 7 days, 14 days, 21 days, and 28 days. Measurement of the mass of the
rock as well as observation of the structure of the pores using a microscope was done
before and after the injection for all variations in the time of injection. The resulting
image of the porous structure will be used to measure the porosity value of the rock
using the thresholding method. Experimental results showed that the mass of carbonate
rocks decreased due to the chemical reaction between carbonate and carbonate acid,
causing the mineral carbonate to dissolve. That makes the pores of the rocks grow. The
porosity value of carbonate rocks obtained from the helium. The porosity measurement
was 3.12%. Porosity measurements using the thresholding method showed the porosity
of carbonate rocks increased during the injection. This study concludes that the chemical
reaction between carbonate rocks and carbonate acid causes the mineral carbonate to
dissolve so that the rocks' pores become larger. The microscopic image shows a change
in the structure of the pores during the injection. The carbonate mass is inversely
proportional to the time of injection, while the solute mass is equal to the injectable time.
The porosity value compared to the injection time is straight, so the longer the injections
take, the greater the porosity value. |
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