Improvement of Low-Permeable Cement for Zonal Isolation at
High-Temperature Conditions

Dubois, Nicolas; Noı̈k, Christine; Rivereau, Alain; Vernet, C.

doi:10.2523/50782-ms

Cited by 4 publications

(2 citation statements)

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“…Certainly, the addition of fi ne-grained fractions causes the sealing of cement matrix, resulting in a decrease in permeability and porosity, an increase in mechanical parameters and durability of hardened cement slurry. However, the usage of the fi ne-grained fi llers can cause an increase in water demand of designed cement slurry, and for this reason it should be taken into account to preserve appropriate rheological parameters usually by the use of appropriate plasticizing agent (23,24). niż średni wymiar ziaren cementu (22).…”

Section: The Infl Uence Of Microadditives On the Porosity Of Hardened...mentioning

confidence: 99%

“…Poza efektem głównym czyli uszczelnieniem matrycy cementowej, czego efektem jest zmniejszenie przepuszczalności i porowatości oraz poprawa właściwości mechanicznych i trwałości stwardniałego zaczynu, stosowanie drobnoziarnistych wypełniaczy może powodować wzrost wodożądności zaczynu. Dlatego też należy mieć na uwadze konieczność zachowania odpowiednich parametrów reologicznych co najczęściej wiąże się z zastosowaniem odpowiednio dobranej domieszki upłynniającej (23,24). consistency and maintenance of the slurry at specifi ed borehole conditions.…”

Section: The Infl Uence Of Microadditives On the Porosity Of Hardened...unclassified

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Reduction of the porosity in hardened oilwell cement slurries by the usage of fine-grained additives

Kremieniewski¹,

Stryczek²

2016

Cem. Wapno Beton

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Section: The Infl Uence Of Microadditives On the Porosity Of Hardened...mentioning

confidence: 99%

Section: The Infl Uence Of Microadditives On the Porosity Of Hardened...unclassified

Reduction of the porosity in hardened oilwell cement slurries by the usage of fine-grained additives

Kremieniewski¹,

Stryczek²

2016

Cem. Wapno Beton

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Usability of Geopolymers for Oil Well Cementing Applications: Reaction Mechanisms, Pumpability, and Properties

Khalifeh

Hodne

Saasen

et al. 2016

SPE Asia Pacific Oil &Amp; Gas Conference and Exhibition

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Portland cement has become the prime material used for zonal isolation; sealing annuli between casings, between casing and formation and finally for plug and abandonment (P&A) operations. However, there are concerns regarding Portland cement such as autogenous shrinkage, high permeability after cracks has occurred, gas influx during waiting on cement (WOC) time, instability at high temperature, ductility and durability. Geopolymers have been suggested as an alternative to Portland cement for oil well applications. Geopolymers are inorganic aluminosilicate cementitious materials condensed as result of a complex reaction known as geopolymerization. The current work presents the usability of a geopolymeric material specially designed for oil well cementing applications, known as aplite rock-based geopolymer. The chemical reaction of the geopolymeric slurries was determined using calorimetry measurements. The rheological behavior of the geopolymers, such as consistometer consistency and viscosity were examined besides their mechanical properties. The investigation of mechanical properties included uniaxial compressive strength, sonic strength and tensile strength. The pumpability and setting time have been studied by changing mix design of the geopolymeric slurries along with the addition of selected retarders. Finally, microstructure of the cured geopolymers was studied using Scanning Electron Microscopy (SEM). The results show that slurries have a non-Newtonian behavior like a Bingham material with a small yield stress. The curing pressure reduced the pumpability of the geopolymeric slurries; however, the reason remained unclear. Addition of sucrose by 1.2 wt.% of the total solid content resulted in an optimal accumulative heat release, which showed the highest strength development. Pumpability of the mixes was prolonged by introducing sucrose to the geopolymeric slurries. Tensile strength of the geopolymers was found to be approximately 5 percent of their compressive strengths.

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The Effect of Drilling Fluid Contamination on the Properties of Granite-Based Geopolymers at Elevated Temperature

Khalili,

Khalifeh,

Saasen

2024

IADC/SPE International Drilling Conference and Exhibition

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Granite-based geopolymers have shown great potential as viable and sustainable alternatives to fully replace OPC. This article shows the impact of drilling fluid contamination (both water-based and oil-based) on the rheological and mechanical properties of such a geopolymer. The mechanisms involved in contamination are also explored. The maximum contamination intake before geopolymers lose most of their strength is investigated. Optimized granite-based geopolymer is mixed with varying volumes of a typical water-based drilling fluid (5% and 10%). The resulting mixture is cured under bottom hole static temperatures (BHST) of 70℃ and 13.79 MPa pressure to simulate production casing conditions. Compressive and tensile strengths of the cured contaminated geopolymer are measured after 1, 3, and 7 days. The early strength is evaluated using the Ultrasonic Cement Analyzer (UCA). The impact of the drilling fluid on the geopolymer's microstructure is analyzed using Scanning Electron Microscopy (SEM). The results show that the geopolymer is more sensitive to the Water-Based Mud (WBM), and slurry does not develop strength after 1 day if contaminated with higher than 10% WBM. This behavior is due to geopolymerization reaction in which water remains in the system, unlike the consumption of water in OPC due to hydration. Particle sedimentation is also increased as more contamination is introduced into the geopolymer. SEM images show that after contamination with OBM, geopolymer slurry becomes an oil in water emulsion which leaves dispersed oil in pores throughout the sample after the setting phase.

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Improvement of Low-Permeable Cement for Zonal Isolation at High-Temperature Conditions

Cited by 4 publications

References 0 publications

Reduction of the porosity in hardened oilwell cement slurries by the usage of fine-grained additives

Reduction of the porosity in hardened oilwell cement slurries by the usage of fine-grained additives

Usability of Geopolymers for Oil Well Cementing Applications: Reaction Mechanisms, Pumpability, and Properties

The Effect of Drilling Fluid Contamination on the Properties of Granite-Based Geopolymers at Elevated Temperature

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