Milled basalt fiber reinforced Portland slurries for oil well applications

Paiva, Luanna Carla Matias; Ferreira, Irantécio Mendonça; Martinelli, Antônio Eduardo; Freitas, Júlio Cézar de Oliveira; Bezerra, Ulisses Targino

doi:10.1016/j.petrol.2018.11.068

Cited by 11 publications

(4 citation statements)

References 34 publications

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“…Above 110 °C, calcium-silicate-hydrates (C-S-H) gel in cement slurry can be transformed into crystalline phases, resulting in a decrease in strength and an increase in permeability (Richardson, 2008;Bahafid et al, 2017;Jeong et al, 2018;Mabeyo, 2021;Kuzielová et al, 2022), which is believed to be the main cause of high temperature strength retrogression of cementitious materials. In the petroleum industry, various materials, such as silica flour, silica fume, rice husk ash, konilite, and basalt, have been added to the cement slurry to address the strength retrogression problem under high temperature (Ge et al, 2018;Paiva et al, 2019;Jiang et al, 2021;Santiago et al, 2021). Among these materials, silica flour is the most commonly used anti-strength retrogression agent and it has been proven to be quite effective for thermal recovery wells where the cement was set at a low temperature before high temperature exposure (Jiang et al, 2021;Santiago et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Mechanism of long-term strength retrogression of silica-enriched Portland cement assessed by quantitative X-ray diffraction analysis

Qin

Pang

et al. 2022

Front. Mater.

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In order to clarify on the driving force of cement long-term strength retrogression, a comprehensive quantitative X-ray diffraction (XRD) analysis were conducted on silica-enriched (60%–80% by weight of cement) cement samples set and cured under the condition of 200°C and 50 MPa with a maximum duration of 180 days. The phase content evolution with time was determined by three different methods on the average of three specimens: the external standard method; the partial or no known crystal structure (PONKCS) method; and the hybrid method. Although the specific phase content estimated by different methods varied slightly, the overall trend of change of all phases were similar. The phase transformation in set cement at high temperature condition is dependent on the slurry composition. In silica-deficient system, tobermorite and amorphous C-S-H were transformed to xonotlite; while in silica-sufficient system, tobermorite and amorphous C-S-H were transformed to gyrolite. These phase transformations involve gradual structural changes of cement hydration products, which may be the driving force of long-term strength retrogression. However, such structural changes can only be detected by XRD once the transformation is complete.

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Section: Introductionmentioning

confidence: 99%

Mechanism of long-term strength retrogression of silica-enriched Portland cement assessed by quantitative X-ray diffraction analysis

Qin

Pang

et al. 2022

Front. Mater.

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“…Therefore, the influence of ultra-high pressure on set cement properties in the long term also needs to be further explored. Numerical simulations of cement sheath integrity often suggest that increasing the tensile strength and ductility of oil well cement is beneficial for its resistance to failure [27][28][29]. Various types of reinforcement materials, such as crystal whisker, fiber, graphene, and latex, were often used to reduce the brittle nature of set cement through the bridging effect across cracks, thereby improving the durability of cement sheath in oil wells [28,29].…”

Section: Addition Of Nano-graphenementioning

confidence: 99%

Effects of Curing Pressure on the Long-Term Strength Retrogression of Oil Well Cement Cured under 200 °C

et al. 2022

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The influences of curing pressure on the physical and mechanical property development of oil well cement during long-term curing were studied. Five silica-enriched cement slurries designed without and with reinforcement materials (latex fiber and nano-graphene) were autoclaved at 200 °C under two different pressures. The low pressure (50 MPa) curing was conducted for 2, 60, 90 and 180 days; the high pressure (150 MPa) curing was conducted for 2 and 360 days. The physical and mechanical properties of set cement were characterized by compressive strength, Young’s modulus, and water/gas permeability; the mineral composition and microstructure were determined by X-ray diffraction, mercury intrusion porosimetry, thermogravimetry and scanning electron microscope. Test results showed that high pressure (150 MPa) curing led to a more compact microstructure, which reduced the rate of strength retrogression in the long term. Samples with reinforcement materials, especially the latex fiber, showed higher compressive strength, Young’s modulus and lower permeability during long-term curing at both pressures.

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“…This process operates on the principle of a "composer,", where a portion of the tensile load acting on the cementitious material is transferred to a "reinforcing" layer formed by the added fibers. Various types of fibers, such as asbestos, polyamide, basalt, and others, are effectively used to achieve this goal [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Identifying the influence of basalt fiber reinforcement on the deformation and strength characteristics of cement stone

Kabdushev,

Delikesheva,

Korgasbekov

et al. 2023

EEJET

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The object of the research is the quality of cementing oil and gas wells with increasing the strength and deformation capacity of cement stone using basalt fibers. Cement slurry used in cementing oil and gas wells faces the problem of failure under the influence of hydraulic fracturing and perforation procedures. This failure leads to the formation of cracks and may require remedial cementing, which increases operating costs and complicates the process of oil and gas production. Moreover, this problem can lead to premature well water breakthrough and cause serious damage such as oil and gas shows and blowouts, which poses a threat to the environment and safety. To solve the problem of the destruction of cement stone under external influences, the study proposed the approach of reinforcing with basalt fiber. During the study, a cementing material based on Portland cement, reinforced with various concentrations of basalt fibers (0.1 %, 0.5 %, 1 % and 2 %), was developed and tested. Cement strength tests at 2, 7, and 14 days, along with deformation monitoring under load, were performed. The addition of basalt fibers to cement stone significantly improved its strength characteristics. The most successful results were achieved with the addition of 0.5 % basalt fibers, resulting in an 11 % increase in compressive and flexural strength. Basalt fibers complement the structure of cement stone, increasing its ability to deform. One of the key features of the obtained results is the possibility of improving the strength of the cement stone without losing its fluidity as a cement slurry. The results obtained are applicable in the development and production of cement materials based on basalt fibers. This will improve the quality of well cementing and reduce the risks of complications

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Milled basalt fiber reinforced Portland slurries for oil well applications

Cited by 11 publications

References 34 publications

Mechanism of long-term strength retrogression of silica-enriched Portland cement assessed by quantitative X-ray diffraction analysis

Mechanism of long-term strength retrogression of silica-enriched Portland cement assessed by quantitative X-ray diffraction analysis

Effects of Curing Pressure on the Long-Term Strength Retrogression of Oil Well Cement Cured under 200 °C

Identifying the influence of basalt fiber reinforcement on the deformation and strength characteristics of cement stone

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