Laboratory Study on Low Temperature Rapid Strength Cement Slurry

Li, Zao Yuan; Zhou, Chao; Li, Jia Ying; Wu, Qi Bing; Guo, Xiao

doi:10.4028/www.scientific.net/amr.287-290.3127

Cited by 3 publications

(1 citation statement)

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“…e three factors influence each other and are inseparable. Mineral materials exert substantial effects on the density, rheological property, and strength of a cement slurry system [8]. An increase in the compactness of cement slurry system is conducive to improving the solid phase content per unit volume of the system, thus increasing the strength [9,10].…”

Section: Introductionmentioning

confidence: 99%

A Low‐Cost and Low‐Density Cement Slurry System Suitable for a Shallow Unconsolidated Stratum

Yue

Liu

Wang

et al. 2020

Advances in Materials Science and Engineering

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The shallow unconsolidated stratum in the offshore oilfield is characterized by large porosity, low temperature, and weak formation and often faces problems such as low density and poor compressive strength of a cement slurry, among others, which pose serious challenges to construction. A high-performance low-density cement slurry system must be used for cementing to ensure the safety of subsequent drilling and mining on-site and to reduce the cost of cement slurry for the efficient development of oil and gas fields. Based on these problems, according to the principle of particle gradation, a mixture with a high accumulation rate and low density composed of five types of mineral materials, i.e., artificial microbeads, floating beads, microsilicon, fly ash, and slag, has been developed through a large number of indoor experiments, and a set of low-cost and low-density cement slurry systems has been developed; these systems are suitable for the shallow loose formations of offshore oil fields. The cement slurry system meets the requirements of the cementing operation conducted under different temperatures and pressures. The density range is 1.4–1.7 g/cm3, which can be adjusted. The cement slurry is stable and exhibits good fluidity. The thickening time meets the requirements of cementing construction. Moreover, the compressive strength of the cement paste is high, and the compressive strength of cement paste is greater than 12 MPa for 24 h and 14 MPa for 48 h of curing at 50°C, which maximizes the economic benefits. The research results provide technical support for the safe and efficient development of offshore oil and gas fields.

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Section: Introductionmentioning

confidence: 99%

A Low‐Cost and Low‐Density Cement Slurry System Suitable for a Shallow Unconsolidated Stratum

Yue

Liu

Wang

et al. 2020

Advances in Materials Science and Engineering

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Common well cements and the mechanism of cement-formation bonding

Lupyana

Maagi

2020

Reviews in Chemical Engineering

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This article reviews the common well cements and describes the basic nature of the cement-formation bond in zonal isolation and its effects on the mechanical and hydraulic performance. The cements are Classes G and H Portland well cements. The cement-formation interface bonding mechanism is a combination of the mechanical indentation of the cement hydrates that interlock to the formation surface and the chemical reactions that occur between the cement slurry and constituents of the rock grains. Mechanical indentation occurs as the hydration products epitaxially grow at the formation surface. The degree to which each of these processes accounts for the formation of the bond is unknown. Here we provide a review of well cement and cement-formation bonds and a discussion of the possible factors that are proposed to influence the microstructural, chemical, and mineralogical properties at the cement-formation interface. In addition, we present some findings about how these factors affect the mechanical and hydraulic performance of the cement-formation bond in zonal isolation.

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Effect of Ultrafine Calcium Silicate on the Mechanical Properties of Oil Well Cement-Based Composite at Low Temperature

Zhu

Jiang

et al. 2022

Applied Sciences

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A low-temperature environment will reduce the hydration rate of oil well cement-based composites, resulting in the slow development of mechanical strength, which cannot meet the requirements of cementing operations. In order to improve the early strength of cement paste under low temperature, the influence of ultrafine calcium silicate powder on the rheological properties, water loss, thickening time and permeability of oil well cement-based composites was evaluated. The compressive strength, flexural strength and impact strength of cement paste with different contents of ultrafine calcium silicate were studied. The hydration process and microstructure of cement paste were analyzed by hydration heat measurement system, X-ray diffraction (XRD) and scanning electron microscope (SEM). The experimental results show that the ultrafine calcium silicate has a certain impact on the rheology and thickening time of cement slurry, and dispersants and retarders are required to adjust these properties when it is used. The ultrafine calcium silicate can improve the stability of cement slurry and reduce water loss and permeability. In addition, under the condition of curing at 20 °C for 24 h, the compressive strength, flexural strength and impact strength of cement paste with 8% ultrafine calcium silicate content increased by 243.0%, 278.5% and 66.3%, respectively, compared with the pure cement paste. The hydration of cement slurry is accelerated by ultrafine calcium silicate, the hydration temperature is enhanced and the heat release of hydration is increased. The ultrafine calcium silicate improves the formation degree of hydration products and makes the structure of cement paste more compact. The research results help to design a low-temperature and early-strength cement slurry system.

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Laboratory Study on Low Temperature Rapid Strength Cement Slurry

Cited by 3 publications

References 0 publications

A Low‐Cost and Low‐Density Cement Slurry System Suitable for a Shallow Unconsolidated Stratum

A Low‐Cost and Low‐Density Cement Slurry System Suitable for a Shallow Unconsolidated Stratum

Common well cements and the mechanism of cement-formation bonding

Effect of Ultrafine Calcium Silicate on the Mechanical Properties of Oil Well Cement-Based Composite at Low Temperature

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