Research on the corrosion behavior of floating bead low-density cement stone/P110 steel system under different CO2 pressure

Author:

Wang Shuliang12ORCID,Wen Zidan1,Zhang Shuai1,Yao Mengjun1,Lei Wanneng3,Wu Mingyu45,Liu Yongbing2,Zhang Xiaoyan16,Zeng Xianguang6,Wang Shidong4ORCID

Affiliation:

1. School of New Energy and Materials, Southwest Petroleum University, Chengdu, China

2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, China

3. Oil & Gas Field Productivity Construction Department, Tarim Oilfield Company, Korla, China

4. Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China

5. Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, Canada

6. Material Corrosion and Protection Key Laboratory of Sichuan Province, Zigong, China

Abstract

This study investigates the corrosion state of the floating bead low-density cement stone/P110 steel system in simulated CO2-saturated formation water under high and atmospheric CO2 pressure. Results show that the resistance of the cement stone reaches a maximum value at 28 days and then decreases. The corrosion rate of P110 steel under high pressure is greater than that under atmospheric pressure. There is a certain gap and accumulation of corrosion products between the cement stone and the steel. Additionally, the maximum gap size and corrosion product thickness reach 27.5 and 67.69 μm, respectively. The composition of the corrosion products on the steel surface is mainly FeCO3, and the presence of the iron oxides are caused by oxidation. The corrosion products of the cement are also confirmed to be CaCO3 and a small amount of SiO2.

Funder

Opening Project of Material Corrosion and Protection Key Laboratory of Sichuan province

Open Fund of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation

Scientific Research Foundation and Opening Foundation of Sichuan Key Laboratory of Energy Carbon Neutralization New Materials

National Natural Science Foundation of China

Publisher

SAGE Publications

Reference29 articles.

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