An overview of oil well cement retarders and the retardation mechanisms

KG Fikeni, X Pang, Y Yu, X **a, F Sun, H Wang… - Geoenergy Science and …, 2024 - Elsevier
With the depletion of conventional shallow gas and oil reserves, more wells are being drilled
into deep and ultra-deep reservoirs to find new hydrocarbons or other types of geoenergy to …

Hydration kinetics and strength retrogression mechanism of silica-cement systems in the temperature range of 110° C–200° C

L Sun, X Pang, S Ghabezloo, H Wang, J Sun - Cement and Concrete …, 2023 - Elsevier
A comprehensive investigation of silica-cement hydration kinetics and engineering
properties in the temperature range from 110° C to 200° C and pressure range from 25 MPa …

Improvement of the microstructure of hydration products in cement paste by epoxy resin under high temperature and high pressure

K Liu, C Yang, Y Zheng, C Mei, L Jiao, F Wang… - … and Building Materials, 2024 - Elsevier
This study develops a resin cement paste (RCP) with excellent elastic deformation and
strength at high temperature and high pressure (HTHP) and determines the reinforcement …

[HTML][HTML] Mechanical degradation of Longmaxi shale exposed to water-based fluids and supercritical carbon dioxide

J Du, AJ Whittle, L Hu, T Divoux, JN Meegoda - Journal of Rock Mechanics …, 2024 - Elsevier
Mechanical alterations in shale formations due to exposure to water-based fracturing fluids
and supercritical carbon dioxide (ScCO 2) significantly affect the performance of shale gas …

[HTML][HTML] Experimental study of pure Class G cement hydration up to 150° C and 50 MPa

L Sun, X Pang, H Liu, C Wang, J Yu, P Zhao - Journal of Materials …, 2023 - Elsevier
A comprehensive experimental investigation of Portland cement hydration kinetics in a wide
temperature range from 35° C to 150° C with pressure up to 50 MPa was performed by heat …

Controlling the hydration rate of alkali-activated slag by the slow release of NaOH

S Guo, Y Li, T Chen, D Zheng, J Du, Y Bu… - Geoenergy Science and …, 2023 - Elsevier
The reaction of alkali-activated slag is very fast and challenging to adjust with the common
retarder used in Portland cement. Thus, achieving control of the hydration rate of alkali …

The effect of evolution of rock asphalt subjected to high temperature and high pressure on the mechanical properties of oil well cement

C Zhang, J Wang, J Cai, K Li, C Hu, KY Mei… - … and Building Materials, 2024 - Elsevier
In this paper, the structural evolution of natural rock asphalt and rock asphalt treated with
liquid nitrogen subjected to high temperature and high pressure (HTHP) were studied, and …

Preparation and mechanism of tartaric acid-intercalated hydrotalcite retarder for oil-well cement

X Guan, F Wang, Q Ren, Y Zheng, K yuan Mei… - … and Building Materials, 2023 - Elsevier
In view of the existing problems of retarding agents, such as abnormal cementing of cement
slurry, slow development of cement strength, low strength, poor thermal stability and …

Effects of amorphous nano-silica on hydration products of tricalcium silicate at 80 C

B Yuan, S Yang, B Xu, X Qiao, J Duan - Construction and Building Materials, 2023 - Elsevier
The hydration products of G-grade oil well cement can affect its overall performance, which
is currently enhanced by nano-silica (nano-SiO 2). However, the hydration process and …

Influence of Various Nanomaterials on the Rheology and Hydration Kinetics of Oil Well Cement

MB Baragwiha, KG Fikeni, Y Zhao, G Cheng, H Ge… - Materials, 2023 - mdpi.com
Nanomaterials have great potential to influence the properties of cement-based materials
due to their small particle size and large specific surface area. The influences of Nano-SiO2 …