TY - JOUR
T1 - The Role of MgO as Swelling Cements Admixtures under CO2 Attack on API Class-G Cement
AU - Palilu, Juniarto M.
AU - Soegijono, Bambang
AU - Marbun, Bonar T.H.
N1 - Funding Information:
1Doctoral Program, Department of Physics, Universitas Indonesia, Depok, Jawa Barat-16424, Indonesia 2Oil and Gas General Directory, Ministry of Energy and Mineral Resources, Gedung Migas,Jl.HRRasunaSaidKav.B-5,Jakarta12910, Indonesia 3DepartmentofPhysics,UniversitasIndonesia,Depok,JawaBarat16424, Indonesia 4Faculty of Mining and Petroleum Engineering, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung, Indonesia
Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2019/10/9
Y1 - 2019/10/9
N2 - API Class-G Portland cement commonly put in as zonal isolation material in oil and/or gas well. Corrosion against the well zonal isolation material could lead to potential leakage of formation fluid such oil, gas, or water. It is widely known that ordinary Portland cement is thermodinamically unstable in CO2 rich environment, which can be found in the CO2 geological sequestration. CO2 attack on API Class-G cement had been observed through experiments that simulate the down hole condition of Geological Sequestration of CO2. Some of the experiment reveal the detrimental effect of CO2 such as increase of porosity and permeability of cement sheath corroded by CO2 attack. The degradation of API Class-G cement by CO2 involves emergence and crystallization of CaCO3 from Ca(OH)2 which is formed during hydration of cement. In this experiment, we examine the role of addition of MgO swelling cement by weight fraction to mitigate the corrosion caused by CO2 against downhole hardened API Class-G cement thus inhibits the occurrence of leakage path of CO2. Observation for characterization and analysis by XRD, optical microscope, and cement paste uniaxial volumetric expansion presented in this paper. The conclusion will provide insights into design of carbonation resistant cement slurries using swelling cements admixtures.
AB - API Class-G Portland cement commonly put in as zonal isolation material in oil and/or gas well. Corrosion against the well zonal isolation material could lead to potential leakage of formation fluid such oil, gas, or water. It is widely known that ordinary Portland cement is thermodinamically unstable in CO2 rich environment, which can be found in the CO2 geological sequestration. CO2 attack on API Class-G cement had been observed through experiments that simulate the down hole condition of Geological Sequestration of CO2. Some of the experiment reveal the detrimental effect of CO2 such as increase of porosity and permeability of cement sheath corroded by CO2 attack. The degradation of API Class-G cement by CO2 involves emergence and crystallization of CaCO3 from Ca(OH)2 which is formed during hydration of cement. In this experiment, we examine the role of addition of MgO swelling cement by weight fraction to mitigate the corrosion caused by CO2 against downhole hardened API Class-G cement thus inhibits the occurrence of leakage path of CO2. Observation for characterization and analysis by XRD, optical microscope, and cement paste uniaxial volumetric expansion presented in this paper. The conclusion will provide insights into design of carbonation resistant cement slurries using swelling cements admixtures.
UR - http://www.scopus.com/inward/record.url?scp=85074752252&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/1245/1/012036
DO - 10.1088/1742-6596/1245/1/012036
M3 - Conference article
AN - SCOPUS:85074752252
VL - 1245
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 1
M1 - 012036
T2 - 7th Biannual International Conference on Mathematics and Natural Sciences, ICMNS 2018
Y2 - 2 November 2018 through 3 November 2018
ER -