The effect of lightweight agents on the density of cement slurry applied during oil and gas well drilling

Bubnov, A S; Khorev, V S; Boyko, Irina

doi:10.1088/1755-1315/24/1/012008

Cited by 3 publications

(2 citation statements)

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“…HGMs are generally utilized as fillers [14] owing to their unique performance such as chemical, corrosion and fire resistance, light quality, and superior mechanical and physical properties [19,21,22]. Moreover, the spherical shape and the smooth surface of HGM has yielded to their use in oil well cement slurry [23]. It has been reported that HGM particles may cause an alkali-silica reaction in cement mortar [24], therefore before using HGMs in cementitious materials their chemical reactivity with cement compounds should be researched.…”

Section: Introductionmentioning

confidence: 99%

Lightweight Cement-Based Composites Incorporating Hollow Glass Microspheres: Fresh and Hardened State Properties

Kabay¹,

Kizilkanat²,

Aktürk³

et al. 2022

Teknik Dergi

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This research aims to develop a lightweight cementitious composite with satisfying mechanical and good thermal insulating properties. Two different types of hollow glass microspheres (HGM) were used as lightweight aggregates and were substituted with fine aggregate by 10, 20, and 40% by volume. The rheological, physical, mechanical, and microstructural properties of the resulting HGM-incorporated composites were investigated and correlations were established between physical and mechanical test results. The results showed that the physical and mechanical properties of individual HGM particles play a dominant role in the properties of lightweight mortars. HGM addition provided reductions up to 20% in the density and 45% in the thermal conductivity values of mortars compared to the reference. The best HGM ratio in the tested range was found as 20%, which provides benefits such as reduced density and enhanced thermal insulation capability without causing a significant reduction in compressive strength. It was concluded that HGMs can be used in the lightweight cementitious mortar production which has great potential in building applications to reduce the heating energy consumption.

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Section: Introductionmentioning

confidence: 99%

Lightweight Cement-Based Composites Incorporating Hollow Glass Microspheres: Fresh and Hardened State Properties

Kabay¹,

Kizilkanat²,

Aktürk³

et al. 2022

Teknik Dergi

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“…Over the years, several studies have been conducted to investigate the properties of various lightweight cement recipes. ,− However, laboratory findings and field applications have shown that many lightweight cement slurries have increased wait-on-cement (WOC) times and low early-age strength, increasing the chances of gas migration and delaying post-cementing operations, such as cement bond logging. , …”

Section: Introductionmentioning

confidence: 99%

New Lightweight Cement Formulation for Shallow Oil and Gas Wells

2020

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The use of lightweight pozzolanic aggregates as partial replacement of cement results in low-density cement systems. Such systems ensure effective zonal isolation in zones where low equivalent circulating densities are required. However, low pozzolanic materials, such as fly ash and ground granulated blast furnace slag (GGBFS), have poor early-age strength development and long set times, especially when used in high volume, that is, exceeding 50% by weight of cement. The objective of this study is to develop a lightweight oil- and gas-well cement recipe with enhanced properties employing the synergism that exist among fly ash, GGBFS, and silica fume. The experimental work was per laboratory procedure outlined by American Petroleum Institute. Portland class G cement and the aluminosilicate materials were admixed in water to form a 13.5 ppg slurry. Chemical admixtures were used to facilitate the dissolution of reactive components in the pozzolanic materials and the hydration process. The experimental investigations were done at 150 °F and an ambient pressure of 1500 psi. The newly developed lightweight recipe exhibited excellent rheological and mechanical properties, having a wait-on-cement time for about 4 h and a 24 h sonic strength of 3116 psi, at 150 °F and 1500 psi. The thickening time was approximately 4 h (70 Bc). This slurry will be ideal in zones that would require a low hydrostatic slurry column and rapid gel strength development.

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Investigation of Dehydroxylated Sodium Bentonite as a Pozzolanic Extender in Oil-Well Cement

Adjei

Elkatatny

Sarmah

et al. 2021

SPE Drilling &Amp; Completion

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Summary Fly ash, which is a pozzolan generated as a byproduct from coal-powered plants, is the most used extender in the design of lightweight cement. However, the coal-powered plants are phasing out due to global-warming concerns. There is the need to investigate other materials as substitutes to fly ash. Bentonite is a natural pozzolanic material that is abundant in nature. This pozzolanic property is enhanced upon heat treatment; however, this material has never been explored in oil-well cementing in such form. This study compares the performance of 13-ppg heated (dehydroxylated) sodium bentonite and fly-ash cement systems. The raw (commercial) sodium bentonite was dehydroxylated at 1,526°F for 3 hours. Cement slurries were prepared at 13 ppg using the heated sodium bentonite as partial replacements of cement in concentrations of 10 to 50% by weight of blend. Various tests were done at a bottomhole static temperature of 120°F, bottomhole circulating temperature of 110°F, and pressure of 1,000 psi or atmospheric pressure. All the dehydroxylated sodium bentonite systems exhibited high stability, thickening times in the range of 3 to 5 hours, and a minimum 24-hour compressive strength of 600 psi. At a concentration of 40 and 50%, the 24-hour compressive strength was approximately 800 and 787 psi, respectively. This was higher than a 13-ppg fly-ash-based cement designed at 40% cement replacement (580 psi).

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The effect of lightweight agents on the density of cement slurry applied during oil and gas well drilling

Cited by 3 publications

References 0 publications

Lightweight Cement-Based Composites Incorporating Hollow Glass Microspheres: Fresh and Hardened State Properties

Lightweight Cement-Based Composites Incorporating Hollow Glass Microspheres: Fresh and Hardened State Properties

New Lightweight Cement Formulation for Shallow Oil and Gas Wells

Investigation of Dehydroxylated Sodium Bentonite as a Pozzolanic Extender in Oil-Well Cement

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