Uniaxial compressive strength of geopolymer cement for oil well cement

Abstract

Ensuring oil-well-integrity is one of the challenging tasks when cementing is designed. It has been well established that cement tends to degrade when exposed to a corrosive environment and at elevated temperatures. This paper presents the results of the uniaxial compressive strength of the qualified mixes of geopolymer cement containing fly ash as the precursor. Geopolymer cement samples were cured in the potable water heated at 60 °C and 90 °C for 24 h before testing for uniaxial compressive strength. Uniaxial confined compressive strength test was performed for samples cured at a 60 °C, and results of the samples bearing density of 13, 15, and 17 ppg were obtained as 4.12, 9.21 and 17.68 kPa, respectively. For 90 °C, the compressive strengths were 4.43, 15.34 and 78.14 kPa, respectively, for the samples bearing the same density. Samples cured at 90 °C showed the higher value of UCS as compared to the samples cured at 60 °C, and it was because heat is required to stimulate the polymeric reaction.

Application of anticorrosive materials in cement slurry: Progress and prospect

“…Reduce permeability, improve compressive strength, prevent corrosion, and improve temperature resistance Micropore filling by secondary hydration and alkaline excitation recrystallization Bechar and zerrouki et al, 2018;Lau et al, 2019;Suppiah et al, 2020;Ridha et al, 2020 It can be seen from Figure 2 that under the same pressure, with the continuous increase of temperature, the solubility of CO 2 in pure water decreases first and then increases. Under the conditions of constant pressure, high temperature/ultra-high temperature, the solubility of CO 2 is affected by temperature.…”

“…Lau et al (2019) pointed out that the addition of slag reduces the CaO content in oil well cement, and reacts with silicate components to form C-S-H gel, thus reducing the permeability of cement stone and improving its CO 2 corrosion resistance. Meanwhile, Suppiah et al (2020) experiments found that slag can effectively reduce the elastic modulus of cement stone and improve its deformation resistance. Zhao et al (2022) studied the corrosion of alkali-activated slag cement paste in different acidic media and found that the slag cement paste in acetic acid was more deteriorated than that in sulfuric acid.…”

Analysis of the Weak Soil Behavior, Modified Through Cementation

“…As was described in [4] among various types of chemical techniques the main principle could be identified which rely on chemical reactions between certain stabilizer and soil minerals, either cementitious or puzzolanic in nature, depending on the particular site conditions investigated. In recent studies ( [5], [6]) were analyzed particular properties of the newly created cementitious phase and aspects, influencing its formation. Cementing job is virtually of the transformation of the cement to a liquid slurry and its pumping down the wellbore.…”

Effect of Graphite on the Mechanical and Petrophysical Properties of Class G Oil Well Cement

“…Although it will rise as the curing time rises, it may also fall with further production time. 13 Several researchers tried to improve the stability of cement in these difficult conditions by incorporating new additives, 14 to resist the high-pressure conditions, 15 improve the physical properties of the cement, 16 enhance the cement strength and rheology, 17 enhance the cement hydration and mechanical properties, 18 and to improve the properties of the high-density cement. 19 Graphite is one of the minerals that occur in nature as a metamorphic rock.…”

“…Several researchers tried to improve the stability of cement in these difficult conditions by incorporating new additives, to resist the high-pressure conditions, improve the physical properties of the cement, enhance the cement strength and rheology, enhance the cement hydration and mechanical properties, and to improve the properties of the high-density cement …”