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Journal articles on the topic 'Cement slurries'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 February 2022

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1

Nalyvaiko, O. I., O. L. Melnikov, L. G. Nalyvaiko, R. V. Petrash, and V. N. Khivrenko. "APPLICATION OF HYDROPHOBIC CEMENT SLURRIES «RAN-M» OF «RAMSINKS-2M» GROUP TO AVOID FLUID KICK." ACADEMIC JOURNAL Series: Industrial Machine Building, Civil Engineering 2, no. 49 (January 28, 2018): 295–300. http://dx.doi.org/10.26906/znp.2017.49.857.

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Laboratory studies of cement slurry and cement stone is established that hydrophobic cement slurry «RAN-M» consists of NTPha additives for well cements PTC-1-100 and «Ramsinks-2M». In the laboratory confirmed the technical parameters of the newest hydrophobic cement slurries (mobility, density, separation, pumpability, etc.) according to the standard requirements in the respective devices. Done such works as: implementation of the selection of formulations of cement slurries with different rate of strength development for different temperature integrals.

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2

Kędzierski, Miłosz, and Marcin Rzepka. "Zaczyny cementowe z dodatkiem nanorurek węglowych do uszczelniania otworów wiertniczych o wysokiej temperaturze i ciśnieniu złożowym (150°C, 90 MPa)." Nafta-Gaz 77, no. 5 (May 2021): 323–31. http://dx.doi.org/10.18668/ng.2021.05.05.

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The article presents the results of the influence of carbon nanotubes on the mechanical parameters of cement stones under high temperature and pressure conditions (150°C, 90 MPa). The tests used multi-walled carbon nanotubes (MWCNTs) with an external diameter of 10–20 nm and a length of 10–30 μm. Cement slurries contained 0.1% of CNTs bwoc (by the weight of cement). Laboratory tests of cement slurries were carried out at the Oil and Gas Institute – National Research Institute. The tests were carried out under conditions of increased pressure and temperature at 150°C, 90 MPa. Cement slurries were prepared on the basis of class G drilling cement. Developing recipes were guided by the requirements to be met by cement slurry for the cementing of casing in the conditions of high temperature and reservoir pressures. The densities of tested slurries ranged from 1900 kg/m3 to 2250 kg/m3 (slurries with the addition of hematite). The cement slurries were tested for density, fluidity, rheological parameters, filtration and thickening time. Compressive strength tests and measuring adhesion were carried out after 2, 7, 14 and 28 days. Cement slurry recipes with very good technological parameters were developed and after curing (after 28 days of hydration) had very high values of compressive strength, reaching up to 45 MPa. Cements were characterized by high values of adhesion to pipes reaching up 7 MPa after 28 days. The research showed significant information about possible applications of carbon nanotubes to modify the cement slurry under conditions of high temperature and pressure. The conducted tests confirmed that the addition of even small amounts of CNTs improves the mechanical parameters of the cement stone compared to the base sample without such addition, and also reduces the thickening time of cement slurries and reduces filtration. It is investigated that CNTs addition increases the viscosity and yield point of cement slurry. As a result, slurries with the addition of MWCNTs will more effectively displace the mud from the borehole and significantly affect the quality of cementation.

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3

Kędzierski, Miłosz, Marcin Rzepka, and Marcin Kremieniewski. "Wpływ nanorurek węglowych (CNTs) na parametry mechaniczne kamieni cementowych w warunkach HPHT." Nafta-Gaz 77, no. 2 (February 2021): 106–17. http://dx.doi.org/10.18668/ng.2021.02.05.

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The article presents the results of testing the influence of carbon nanotubes on the mechanical parameters of cement stones under HPHT conditions. Multi-walled carbon nanotubes (MWCNTs) with an external diameter of 10–20 nm and a length of 10–30 μm were used for testing. 0.1% of carbon nanotubes was added to the cement slurry. Laboratory tests of cement slurries were carried out at Oil and Gas Institute – National Research Institute. The tests were carried out under conditions of increased pressure and temperature in the temperature range of 60–130°C and the pressure range of 25–80 MPa. CEM I 42.5R Portland cement and Class G drilling cement were used to make the slurries at temperature of 60oC. Cement slurries for temperatures from 80oC to 130oC were prepared on the basis of class G drilling cement. The recipes were developed on the basis of the requirements to be met by cement slurry for the cementing of casing under conditions of very high temperatures and reservoir pressures. The densities of tested slurries ranged from 1,840 kg/m3 (slurries at a temperature of 60°C) to 2.250 kg/m3 (slurries with the addition of hematite).Compressive strength tests and adhesion measurements were carried out after 2, 7, 14 and 28 days. Cement slurry recipes with very good technological parameters were developed, which after curing (after 28 days of hydration) showed very high values of compressive strength, reaching up to 44 MPa. Cements were characterized by high values of adhesion to pipes reaching up 8 MPa after 28 days and flexural strength of about 11 MPa. The test results show that the addition of carbon nanotubes has a positive effect on the mechanical strength of cement stones with their addition. The stones modified in this way are characterized by high compressive strength and high adhesion to steel pipes. Further research is needed to determine the influence of carbon nanotubes on the microstructure of hardened cement slurries. It is also necessary to conduct further research on the determination of the optimal amounts of these agents and the selection of the most compatible additives for cement slurries that work optimally in combination with nanoparticles.

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4

Skripkiūnas, Gintautas, and Mindaugas Daukšys. "DILATANCY OF CEMENT SLURRIES WITH CHEMICAL ADMIXTURES." JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 10, no. 3 (September 30, 2004): 227–33. http://dx.doi.org/10.3846/13923730.2004.9636310.

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The results of experimental investigation of plasticising, air‐entraining and viscosity‐modifying admixtures with different chemical composition influence on rheological properties and dilatancy of cement slurries are presented in the article. Rheological properties of cement slurries were tested by a rotation viscometer with coaxial cylinder, at different gradients of velocity. Dilatancy of cement slurries was determined by the distortion of the rheological curve and index of dilatancy D was calculated according to proposed methods. The results of investigation show that the properties of liquid disperse medium of structural system influence slightly the dilatancy of cement slurries. Plasticising admixtures with a different chemical composition slightly increases but air-entraining and viscosity-modifying admixtures slightly reduces the dilatancy of cement slurries.

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5

Kut, Łukasz. "Opracowanie receptur zaczynów cementowych do uszczelniania otworów o podwyższonych temperaturach w rejonie Karpat." Nafta-Gaz 77, no. 3 (March 2021): 200–2017. http://dx.doi.org/10.18668/ng.2021.03.06.

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Works related to the drilling of a deep borehole must take into account the specific conditions at its bottom. This applies especially to high temperatures, exceeding 90–100°C, and pressures of 60–80 MPa. Such difficult downhole conditions have often posed many problems when developing appropriate compositions of cement slurries used for sealing columns of casing pipes. With each passing year, drilling companies make deeper and more complicated boreholes, more and more often exceeding 3000 m, which require the use of specially developed recipes of cement slurries when sealing the casing column. In deep boreholes (with very high temperature and pressure), a serious problem is to ensure a long pumping time of the cement slurry, which should be characterized by low viscosity, little or no free water and the lowest filtration possible. Therefore, it is necessary to select appropriate retardants that are resistant to high temperatures and additives ensuring the appropriate technological parameters of the slurries and cement stone. Pressure and temperature parameters increase with the depth of the borehole. Reservoir waters (brines of different mineralization) largely affect the hardened cement slurry, therefore cement slurries intended for deep boreholes should contain in their composition additives that increase thermal resistance, delay setting, lower filtration and improve resistance to chemical corrosion caused by the action of brines reservoir. The aim of the laboratory research was to develop innovative formulas of cement slurries for sealing boreholes, both crude oil and geothermal, with increased temperatures (up to about 130°C) located in the Carpathian region. During the implementation of the topic, laboratory tests were carried out on both cement slurries and cement stones obtained from them. Due to the industry’s interest in acquiring energy from sources other than crude oil and natural gas, a broader scope of laboratory tests covered cement slurries for sealing geothermal boreholes with controlled rheological parameters, which can be used at high reservoir temperatures to seal deep boreholes. The cement slurries were prepared with tap water with the addition of potassium chloride in the amount of 3, 6 and 10% bwow (in relation to the amount of water). The following agents were successively added to the mixing water: defoaming, adjusting the setting and thickening time, plasticizing and reducing filtration. Cement slurries were made with the addition of 10% latex and a latex stabilizer in the amount of 1% bwoc (both components in relation to the weight of dry cement). The other ingredients: microcement (nanocement), microsilica, hematite and cement were mixed together and then added to the mixing water. All cement slurries were prepared on the basis of drilling cement G. When all components blended, the cement slurry was mixed for 30 minutes followed by laboratory measurements such as: density, fluidity, readings from the Fann apparatus, water retention, filtration, thickening time. From among the developed cement slurries, those with the best rheological parameters were selected, then samples of cement stones were prepared from them. Cement slurries were cured for 48 hours in an environment of high temperature and pressure (downhole conditions). The obtained cement stones were tested for: compressive strength, bending strength, porosity, adhesion of cement stone to steel pipes.

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6

Rzepka, Marcin, and Miłosz Kędzierski. "The Use of Nanomaterials in Shaping the Properties of Cement Slurries Used in Drilling." Energies 13, no. 12 (June 16, 2020): 3121. http://dx.doi.org/10.3390/en13123121.

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For several decades, constant research has been performed in the world in order to obtain more durable, tighter, or less environmentally harmful binding materials which could be used to seal casing strings in boreholes. There is an increasing search for innovative solutions allowing the production of the highest possible class of binding cements. Since the beginning of the 21st century, one thing which has become synonymous with development is nanotechnology—a dynamically growing branch of science involving both the design, production, and testing of structures with the size of billionths of a metre. Among other things, a set cement stone is made of the grains of hydrated calcium silicates and calcium aluminates, between which there are pore spaces. Fine grains of nanoparticles can successfully settle inside these spaces, causing a decrease in the porosity and permeability of cement matrix. The paper presents the results of laboratory tests performed for formulas of cement slurries containing between 0.5% and 1% of nanosilica, between 1% and 3% of nanosized alumina and approximately 0.1% of carbon nanotubes. The resulting slurries had a density of approximately 1830–1920 kg/m3 and zero water settling. The thickening times of slurries were selected in accordance with the given geological and technical conditions. Early compressive strength amounting to 3.5 MPa (based on a test using an ultrasound cement analyser) was achieved by slurries after times between approximately 7 and 14 h. Upon setting of samples, cement stones produced from slurries featured a very low share of capillary pores. After 28 days of hydration, the compressive strength of the resulting cement stones took on very high values, reaching even up to 50 MPa. Photographs of cement stones containing nanomaterials (taken by means of scanning microscopy) are a confirmation of the exceptionally compact microstructure of the resulting samples.

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7

Pike, William J. "Reciprocating Cement Slurries After Placement." Journal of Petroleum Technology 49, no. 08 (August 1, 1997): 846–48. http://dx.doi.org/10.2118/0897-0846-jpt.

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8

Bybee, Karen. "Transition Time of Cement Slurries." Journal of Petroleum Technology 57, no. 08 (August 1, 2005): 45–70. http://dx.doi.org/10.2118/0805-0045-jpt.

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9

Tang, Zhengjie, Runzhou Huang, Changtong Mei, Xiuxuan Sun, Dingguo Zhou, Xiuqiang Zhang, and Qinglin Wu. "Influence of Cellulose Nanoparticles on Rheological Behavior of Oil Well Cement-Water Slurries." Materials 12, no. 2 (January 17, 2019): 291. http://dx.doi.org/10.3390/ma12020291.

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Performance of hardened oil well cement (OWC) is largely determined by the rheological properties of the cement slurries. This work was carried out to investigate the effect of water- to-cement ratio (WCR) and cellulose nanoparticles (CNPs), including cellulose nanofibers (CNFs) and cellulose nanocrystals (CNCs), on rheology performance of OWC-based slurries using a Couette rotational viscometer coupled with rheological models. The yield stress and viscosity of neat OWC slurries had a decreasing trend with the increase of WCRs. The suspension became increased unstable with the increase of WCRs. The properties of CNPs, including rheological behaviors, surface properties and morphology, determine the rheological performance of CNP-OWC slurries. In comparison with CNC-OWC slurries, the gel strength, yield stress and viscosity of CNF-OWC slurries were higher as CNFs were more likely to form an entangled network. The gel strength, yield stress and viscosity of CNP-OWC slurries increased with reduced CNF size through regrinding and the proportion of CNFs in the mixture of CNFs and CNCs, respectively.

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10

Tao, Chengcheng, Barbara G. Kutchko, Eilis Rosenbaum, and Mehrdad Massoudi. "A Review of Rheological Modeling of Cement Slurry in Oil Well Applications." Energies 13, no. 3 (January 24, 2020): 570. http://dx.doi.org/10.3390/en13030570.

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The rheological behavior of cement slurries is important in trying to prevent and eliminate gas-migration related problems in oil well applications. In this paper, we review the constitutive modeling of cement slurries/pastes. Cement slurries, in general, behave as complex non-linear fluids with the possibility of exhibiting viscoelasticity, thixotropy, yield stress, shear-thinning effects, etc. The shear viscosity and the yield stress are two of the most important rheological characteristics of cement; these have been studied extensively and a review of these studies is provided in this paper. We discuss the importance of changing the concentration of cement particles, water-to-cement ratio, additives/admixtures, shear rate, temperature and pressure, mixing methods, and the thixotropic behavior of cement on the stress tensor. In the concluding remarks, we propose a new constitutive model for cement slurry, considering the basic non-Newtonian nature of the different models.

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11

CHERNYSHOV, Sergei, Vladislav GALKIN, Zoya ULYANOVA, and David Macdonald. "Development of mathematical models to control the technological properties of cement slurries." Journal of Mining Institute 242 (May 26, 2020): 179. http://dx.doi.org/10.31897/pmi.2020.2.179.

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Oil and gas producing enterprises are making increasingly high demands on well casing quality, including the actual process of injection and displacement of cement slurry, taking into account requirements for the annular cement level, eliminating possible hydraulic fracturing, with developing a hydraulic cementing program. It is necessary to prevent deep invasion of cement slurry filtrate into the formation to exclude bridging of productive layers. It is impossible to fulfill all these requirements at the same time without application of modifying additives; complex cement compositions are being developed and applied more often. Furthermore, need to adjust cement slurries recipes appears for almost every particular well. In order to select and justify cement slurries recipes and their prompt adjustment, taking into account requirements of well construction project, as well as geological and technical conditions for cementing casing strings, mathematical models of the main technological properties of cement slurries for cementing production casing strings in the Perm Region were developed. Analysis of the effect of polycarboxylic plasticizer (Pl) and a filtration reducer (fluid loss additive) based on hydroxyethyl cellulose (FR) on plastic viscosity (V), spreadability (S) and filtration (F) of cement slurries is conducted. Development of mathematical models is performed according to more than 90 measurements.

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12

Stryczek, Stanisław, Rafał Wiśniowski, Andrzej Gonet, Albert Złotkowski, and Jan Ziaja. "Influence of Polycarboxylate Superplasticizers on Rheological Properties of Cement Slurries Used in Drilling Technologies / Wpływ Superplastyfikatorów Z Grupy Polikarboksylanów Na Właściwości Reologiczne Zaczynów Cementowych Stosowanych W Technologiach Wiertniczych." Archives of Mining Sciences 58, no. 3 (September 1, 2013): 719–28. http://dx.doi.org/10.2478/amsc-2013-0050.

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Abstract Sealing slurries, mainly the cement-based ones, are concentrated dispersive systems, containing solid particles of considerably developed specific surface. Rheologically, such systems are very complex. This also stems from the fact that the rheological properties have a significant effect on: • additives and admixtures modifying technological properties of fresh and set slurries, • chemically complex mechanism of hydration in a slurry in a function of time. Special attention should paid to plasticizing (plasticizers PL) and liquefying (traditional and new- -generation superplasticizers SP) admixtures affecting the modification and optimization of rheological properties of fresh cement slurries as far as providing efficiency of sealing of casing pipes is concerned. Laboratory analyses were focused on proving the following thesis: properly selected type of superplasticizer [by BASF Polska Sp.z o.o. (The Chemical Company) - Admixtures for Concrete Division] advantageously affects the rheological parameters of sealing slurry based on metallurgical cement CEM III /A 32,5. The following variables were used in the analyses: • type of superplasticizer, • type of batch fluid. The laboratory experiments were made on superplasticizers produced by BASF: • SKY 501, • SKY 503, • SKY 591, • ACE 430, • Glenium 115. The superplasticizer concentration in the slurry was 0.5 wt% (as compared with mass of dry cement). Water to cement ratio for the analyzed sealing slurries was equal to 0.5. The sealing slurries were made of metallurgical cement CEM III/A 32,5 N-LH/HSR/N Lafarge Cement S.A. in Małogoszcz.

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13

Tao, Chengcheng, Eilis Rosenbaum, Barbara G. Kutchko, and Mehrdad Massoudi. "A Brief Review of Gas Migration in Oilwell Cement Slurries." Energies 14, no. 9 (April 22, 2021): 2369. http://dx.doi.org/10.3390/en14092369.

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Gas migration in oil and gas wells is defined as gases and/or fluids from adjacent formations invading a freshly cemented annulus. During well completions, gas and/or fluids can migrate to zones with lower pressure or even to the surface. Static gel strength (SGS), related to the yield stress of the cement, is a widely accepted measurement used to predict and minimize gas migration. In this review article, we look at the mechanisms and some possible solutions to gas migration during oil and gas well cementing. The use of static gel strength (SGS) and experimental measurements for SGS and wellbore pressure reduction are discussed. Rheological properties, including the yield stress and the viscosity of cement slurries, are also briefly discussed. Understanding the rheological properties of cement is complex since its material properties depend on cement type, as well as the shape and size distribution of cement particles. From this brief review, it is evident that in order to reduce free water and settling of the cement particles, to lower fluid loss, and to develop compressive strength in the early stages of cementing, an optimal cement slurry design is needed. The SGS test is a standard method used in estimating the free water in the well and could be a reference for gas migration reduction for oilwell cement slurries.

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14

Moulin, E., and P. Revil. "Improved Performance of Lightweight Cement Slurries." Journal of Petroleum Technology 49, no. 08 (August 1, 1997): 852–53. http://dx.doi.org/10.2118/0897-0852-jpt.

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15

Minaev, K., V. Gorbenko, and O. Ulyanova. "Lightweight Cement Slurries based on vermiculite." IOP Conference Series: Earth and Environmental Science 21 (August 28, 2014): 012034. http://dx.doi.org/10.1088/1755-1315/21/1/012034.

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16

D'Angelo, Ralph, Thomas J. Plona, Lawrence M. Schwartz, and Peter Coveney. "Ultrasonic measurements on hydrating cement slurries." Advanced Cement Based Materials 2, no. 1 (January 1995): 8–14. http://dx.doi.org/10.1016/1065-7355(95)90034-9.

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17

Kremieniewski, Marcin. "Influence of Graphene Oxide on Rheological Parameters of Cement Slurries." Energies 13, no. 20 (October 19, 2020): 5441. http://dx.doi.org/10.3390/en13205441.

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In recent years, graphene-based nanomaterials have been increasingly and widely used in numerous industrial sectors. In the drilling industry, graphene oxide in cement slurry has significantly improved the mechanical parameters of cement composites and is a future-proof solution. However, prior to placing it in a borehole ring space, cement slurry must feature appropriate fluidity. Graphene oxide has a significant influence on rheological parameters. Therefore, it is necessary to study graphene oxide’s influence on the rheological parameters of cement slurries. Thus, this paper presents rheological models and the results of studies on rheological parameters. A basic cement slurry and a slurry with a latex addition were used. The latex admixture was applied at concentrations of 0.1%, 0.03%, and 0.06%. In total, studies were carried out for six slurries with graphene oxide and two basic slurries. The obtained results of studies on the slurries with graphene oxide were compared with the control slurry. It was found that the smallest graphene oxide concentration increased slurry value, some rheological parameter values, plastic viscosity, and the flow limit. Surprisingly, a concentration up to 0.03% was an acceptable value, since the increase in plastic viscosity was not excessively high, which allowed the use of cement slurry to seal the hole. Once this value was exceeded, the slurry caused problems at its injection to the borehole.

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18

Bayanak, Mahmoud, Soroush Zarinabadi, Khalil Shahbazi, and Alireza Azimi. "Reduction of fluid migration in well cement slurry using nanoparticles." Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles 75 (2020): 67. http://dx.doi.org/10.2516/ogst/2020044.

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One of the main problems during oil well completion and cementing operation is fluid migration through cement bulk or behind the cemented casing. Slurry composition and characteristic have been focused and improved in last decades to mitigate gas migration and, recently, aspects such as using nanotechnology have been investigated to amend the conditions. In this research, two moderate base slurries with 95 and 120 Pound per Cubic Feet (PCF) densities containing different percentages of nanosilica have been examined using a perfect test package. The results of Fluid Migration Analyzer (FMA) demonstrated that using correct percentage of nanosilica particles modified rheological behavior of the slurries and decreased fluid migration volume. Moreover, adding nanoparticles did not have any negative effects on any conventional parameters. However, static gel strength analyzer showed significant transient time reduction which is an important key in cement setting profile. Triaxial test results together with Mohr circles analyzing presented considerable progress in cement stability and compressive strength.

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19

Bezerra, U. T., A. E. Martinelli, D. M. A. Melo, M. A. F. Melo, and V. G. Oliveira. "The strength retrogression of special class Portland oilwell cement." Cerâmica 57, no. 342 (June 2011): 150–54. http://dx.doi.org/10.1590/s0366-69132011000200004.

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Temperatures in excess of 110 ºC result in phase transformations of cement, significantly decreasing its compressive strength. This effect is referred to as strength retrogression. It is frequently observed in cement sheaths of heavy oil wells submitted to steam injection. The present study evaluated the mechanical behavior of Special Class Portland Oilwell Cement (SCPOC) slurries containing silica flour to prevent retrogression. A factorial statistical planning was used to assess the effect of the main variables on the mechanical behavior of cement slurries, i.e., mechanical testing temperature (30, 100, 120, 180 and 230 ºC); contents of silica flour replacing cement (0-18 and 36%) and curing time for rupture (12 h and 7 days). The results revealed that slurries containing 18% of silica flour tested at 230 ºC depicted an increase in compressive strength up to 30% after curing for 12 h and 10% after curing for 7 days, indicating retrogression. On the other hand, testing slurries containing silica flour at temperatures up to 180 ºC revealed strength increase of just 10%, suggesting the mechanical stability of the SCPOC, which prevents retrogression. Such behavior was probably related to the relatively low content of C3A and low specific area of the material. Therefore, strength retrogression at typical bottom hole temperatures of up to 180 ºC can be controlled by small additions of silica flour, economically contributing to the use of SCPOC cementing.

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20

Shchipunova, Darya P., and Tatyana A. Kulagina. "PRODUCTION OF CEMENT SLURRIES USING INDUSTRIAL WASTE." XXI century. Technosphere Safety 3, no. 2 (June 2018): 72–80. http://dx.doi.org/10.21285/2500-1582-2018-2-72-80.

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21

Justnes, H., D. van Loo, B. Reyniers, P. Skalle, J. Sveen, and E. J. Sellevold. "Chemical shrinkage of oil well cement slurries." Advances in Cement Research 7, no. 26 (April 1995): 85–90. http://dx.doi.org/10.1680/adcr.1995.7.26.85.

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22

Backe, K. R., O. B. Lile, and S. K. Lyomov. "Characterizing Curing Cement Slurries by Electrical Conductivity." SPE Drilling & Completion 16, no. 04 (December 1, 2001): 207. http://dx.doi.org/10.2118/74694-pa.

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23

Shahriar, Anjuman, and Moncef L. Nehdi. "Rheological properties of oil well cement slurries." Proceedings of the Institution of Civil Engineers - Construction Materials 165, no. 1 (February 2012): 25–44. http://dx.doi.org/10.1680/coma.2012.165.1.25.

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24

Skripkiūnas, Gintautas, and Mindaugas Daukšys. "Dilatancy of cement slurries with chemical admixtures." Journal of Civil Engineering and Management 10, no. 3 (January 2004): 227–33. http://dx.doi.org/10.1080/13923730.2004.9636310.

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25

Saasen, Arild, Craig Marken, Jeff Dawson, and Murray Rogers. "Oscillating rheometer measurements on oilfield cement slurries." Cement and Concrete Research 21, no. 1 (January 1991): 109–19. http://dx.doi.org/10.1016/0008-8846(91)90037-i.

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26

Aboelkheira, Mostafa, Celeste Siqueira, Fernando Souza Jr., and Romildo Toledo. "MACROMOLECULAR AND AROMATIC CHARACTER INFLUENCE OF SBR ON THE RHEOLOGICAL PROPERTIES OF WELL CEMENT SLURRIES." Journal of Urban Technology and Sustainability 1, no. 1 (December 11, 2018): 21–27. http://dx.doi.org/10.47842/juts.v1i1.8.

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Ensuring the rheological properties of the latex-based cement slurries in steam EOR is indispensable. Ca(OH)2 is produced after cement/water reaction and the macromolecules tend to disturb the hydration process, after the latex demulsification, by covering the cement particle. The free water decreases due to the high hydrophilicity of demulsified SBR, where final gel values increased up to 67%. The slump diameter was decreased exponentially by increasing the latex content limiting the workability. SBR-modified slurries presented a Pseudoplastic non-Newtonian flow behavior and the plastic viscosity decreases gradually, while the yield stress values registered a progressive increment by adding SBR till 10%.

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27

Rzepka, Marcin, and Miłosz Kędzierski. "Badania procesu żelowania zaczynów cementowych przeznaczonych do uszczelniania otworów przewiercających płytkie poziomy gazonośne." Nafta-Gaz 77, no. 4 (April 2021): 235–43. http://dx.doi.org/10.18668/ng.2021.04.03.

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The article presents issues related to the sealing slurry technology concerning gelling processes (i.e., static built-up of gel strength of cement slurries). Based on research conducted around the world, it can be concluded that the rate of gelling of the cement slurry has an important role in the process of preventing possible gas exhalations from the annular space. After the cement slurry is pumped into the borehole (especially in zones with shallow gas horizons), the so-called migration (exhalation) of the formation medium (i.e. uncontrolled outflow of e.g. gas from the annular space) may occur. The most important caused of gas migration from the shallow horizons after casings cementation are the inability to maintain a certain overpressure by the column of the binding cement slurry and too long binding of the cement slurry after pumping into the borehole. The initially liquid cement slurry, when pumped out of the casing, acts as a liquid, creating a certain hydrostatic pressure on the deposit. e.g. gas. However, after some time, the period of building the static gel strength (SGS) starts until the cement sets. The SGS building process, i.e. gelling of the cement slurry, reduces the ability to transmit hydrostatic pressure to the reservoir. The Oil and Gas Institute – National Research Institute has tested a number of cement slurry formulations characterized by different gelling and bonding times. Slurries were made on the basis of three typed of latex with the symbols L1, L2, L3, two types of water glass with symbols S1, S2, amorphous silica with the symbol CB, nano-components based on n-SiO2 and n-Al2O3 with the symbols NS and NA as well as high-molecular weight polymer with the symbol GS. Different amounts of setting accelerator were used with the tested slurries. Tests were carried out for eighteen cement recipes, which made it possible to select the optimal compositions of slurries with short gelling and setting times. The samples containing one of the types of latex in the appropriate concentration, the GS polymer, as well as those containing n-SiO2 and n-Al2O3, showed a very advantageous course of the gelation plot (static build-up of gel strength). Their TT transition times, reflecting the course of gelation, ranged from several to several tens of minutes (which is a proof of high ability to prevent gas migration from shallow gas accumulations). The cement slurries developed at the Oil and Gas Institute – National Research Institute, due to their good technological parameters, could be used in the process of cementing casing strings.

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Justnes, H., P. Skalle, J. Sveen, and B. A. Øye. "Porosity of oil well cement slurries during setting." Advances in Cement Research 7, no. 25 (January 1995): 9–12. http://dx.doi.org/10.1680/adcr.1995.7.25.9.

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Purnell, P., O. J. Francis, and C. L. Page. "Formation of thaumasite in synthetic cement mineral slurries." Cement and Concrete Composites 25, no. 8 (December 2003): 857–60. http://dx.doi.org/10.1016/s0958-9465(03)00112-4.

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Lu, Haichuan, Chengbin Xie, Yonghui Gao, Lirong Li, and Haijin Zhu. "Cement Slurries With Rheological Properties Unaffected by Temperature." SPE Drilling & Completion 30, no. 04 (January 1, 2016): 316–21. http://dx.doi.org/10.2118/178922-pa.

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31

Plee, D., F. Lebedenko, F. Obrecht, M. Letellier, and H. Van Damme. "Microstructure, permeability and rheology of bentonite — cement slurries." Cement and Concrete Research 20, no. 1 (January 1990): 45–61. http://dx.doi.org/10.1016/0008-8846(90)90115-e.

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32

Jamrozik, Aleksandra, Stanisław Stryczek, Rafał Wiśniowski, Andrzej Gonet, and Rafał Wójcik. "An application of organic nanosilica to cement slurries based on Portland cement." AGH Drilling, Oil, Gas 32, no. 4 (2015): 747. http://dx.doi.org/10.7494/drill.2015.32.4.747.

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33

Zimina, D. A., and M. V. Nutskova. "Research of technological properties of cement slurries based on cements with expanding additives, portland and magnesia cement." IOP Conference Series: Materials Science and Engineering 666 (December 7, 2019): 012066. http://dx.doi.org/10.1088/1757-899x/666/1/012066.

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34

Mehdiyev, K. K., and Kh M. Ibrahimov. "Development of lightweight cement slurries for stabilizing producing formation in absorbing wells." Azerbaijan Oil Industry, no. 5 (May 15, 2021): 29–33. http://dx.doi.org/10.37474/0365-8554/2021-5-29-33.

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The paper presents the results of laboratory investigations on the development of lightweighted cement compositions for improvement of stabilizing of producing formation, as well as the hermetization of the areas with low frac gradients. To obtain lightweighted cement, few optimum compositions have been specified through experiments adding the agents in various thickness and concentrations into the mixture. The distribution of optimum compositions, the beginning and end of the hermetization, the solidness and density have been defined. The density of cement slurry developed on cement+seawater is 1900 kg/m3, the density of that on the cement+seawater+chamotte+bark+polymer+CaCl2 is 1610 kg/m3, the density of one developed on the cement+seawater+bark+CaCl2+carbonate+Al powder is 1700 kg/m3 and the density of cement slurry on cement+seawater+bark+CaCl2+keramzit comprised 1590 kg/m3.

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35

Kremieniewski, Marcin, Rafał Wiśniowski, Stanisław Stryczek, and Grzegorz Orłowicz. "Possibilities of Limiting Migration of Natural Gas in Boreholes in the Context of Laboratory Studies." Energies 14, no. 14 (July 14, 2021): 4251. http://dx.doi.org/10.3390/en14144251.

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Gas migration through fresh and hardened cement slurry is an ongoing problem in the oil industry. In order to eliminate this unfavourable phenomenon, research is being conducted on new compositions of slurries for gas wells. The article presents the results of research for slurries with low and high resistance to gas migration. The proper selection of the quantity and quality of components makes it possible to design slurry with the required static structural strength values. In addition, the cement sheath of such anti-migration slurry has low porosity and a very low proportion of large pore spaces. Additionally, the mechanical parameters do not decrease during long-term deposition in borehole-like conditions. By obtaining these results, it was possible to design slurry whose cement sheath has high corrosion resistance. The new slurry has a lower water-cement ratio. Additionally, GS anti-migration copolymer, anti-filter additive and latex are used. The presence of n-SiO2 aqueous solution and microcement allows for sealing the microstructure of the hardened cement slurry. Such modifications significantly improve the technological parameters of the cement slurry and the cement coat formed from it.

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Gasymov, O. I. "On the definition of thermo-physical properties of drilling mud and cement slurry in well drilling." Azerbaijan Oil Industry, no. 4 (April 15, 2020): 15–18. http://dx.doi.org/10.37474/0365-8554/2020-4-15-18.

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A great number of studies are dedicated to the definition of heat conductivity of drilling muds and cement slurries. It should be noted that existing works on the specification of heat conductivity of the drilling mud are based on either experimental or theoretical studies in which well conditions are reflected incompletely. Considering all above-mentioned aspects, the practical interest consists in the definition of thermal conductivity of drilling muds and cement slurries in well drilling on the basis of the data obtained at the wellhead during unsteady processes execution. The paper offers the method of definition of the heat conductivity of drilling mud and cement slurry flows based on the data of temperature change at the well entry and exit through the time, which can be recorded directly at the wellhead. The method is based on the accurate solution of reverse problem of thermal exchange in the movement of drilling mud and cement slurry via Laplas transformation.

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37

Kledyński, Zbigniew, Paweł Falaciński, Agnieszka Machowska, Łukasz Szarek, and Łukasz Krysiak. "Hardening Slurries with Fluidized-Bed Combustion By-Products and Their Potential Significance in Terms of Circular Economy." Materials 14, no. 9 (April 21, 2021): 2104. http://dx.doi.org/10.3390/ma14092104.

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Hardening slurries (water-bentonite-binder mixtures) constitute a well-established material used broadly, i.a., for cut-off walls in civil and water engineering. Although they usually contain Portland cement, similar to common concrete, their properties differ greatly, mostly due to a much higher water content. This characteristic of hardening slurries creates unique opportunities for the utilization of significant quantities of industrial by-products that are deemed problematic in the concrete industry. This article investigates the effect of the addition of by-products of fluidized-bed combustion of hard, brown coal and municipal sewage sludge, as well as ground granulated blast furnace slag, on the properties of slurries. Unconfined compressive strength tests, as well as mercury porosimetry, scanning electron microscopy, and X-ray diffraction analyses were performed. The results suggest that it is possible to design hardening slurry mixes of desired properties, both in liquid and solid state, containing at least 100–300 kg/m3 of industrial waste. This includes cement-free slurries based entirely on industrial by-products as binders. In addition, the analyzed slurries exhibited good chemical resistance to landfill eluates, at the same time effectively immobilizing heavy metals. It was concluded that hardening slurry technology can ensure the safe deposition of significant amounts of waste that would be otherwise difficult to manage, thus contributing to the circular economy concept.

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Kremieniewski, Marcin, Bartłomiej Jasiński, Grzegorz Zima, and Łukasz Kut. "Reduction of Fractionation of Lightweight Slurry to Geothermal Boreholes." Energies 14, no. 12 (June 21, 2021): 3686. http://dx.doi.org/10.3390/en14123686.

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When designing the cement slurry for casing string cementing in geothermal boreholes, the appropriate thermal conductivity is selected. In the zone of geothermal water, where thermal energy is collected, cement slurry is used, from which the cement sheath has high thermal conductivity. On the other hand, the remaining part of the opening is sealed with slurry, from which the cement sheath will reduce thermal energy losses through appropriate thermal insulation. Cement slurry with appropriate thermal insulation includes light insulating materials. However, the use of such additives is very problematic as they are fractionated due to their low density. Therefore, measures should be taken to prevent fractionation of the cement slurry for sealing geothermal boreholes. This article presents the results of research on fractionation of cement slurries for sealing geothermal boreholes. 12 slurries were used for the tests. Six of them are based on class A cement, and six based on class G cement. This action shows the differences in fractionation depending on the binder used. However, the main area of research is determining the effectiveness of counteracting fractionation by the means used for this purpose. As a result of the conducted works, a very good improvement of the cement slurry stability is obtained after the introduction of xanthan gum, as well as filtration perlite. These measures prevent fractionation, so that the cement slurry has a homogeneous structure, and the cement sheath provides the required thermal insulation in the geothermal well.

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39

da Nóbrega, Ana Cecilia Vieira, Luís Augusto Sousa Marques Rocha, Edith Ariza Avila, Antonio Eduardo Martinelli, Dulce Maria de Araújo Melo, and Maria das Vitórias Vieira Almeida de Sá. "Effect of the Acid Environment on the Electrochemical Behaviour of 1045 Steel Reinforced Cement." Materials Science Forum 730-732 (November 2012): 763–68. http://dx.doi.org/10.4028/www.scientific.net/msf.730-732.763.

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External corrosion is one of the most common causes of oilwell casing failure. Hostile environments can be due to acidizing treatments. Although it is common to add corrosion inhibitors and oxygen scavengers in acidic solutions to control external casing corrosion, their real efficiency is unknown yet. Therefore, it is important to establish how aggressive to steel are the different hostile environments to help decide which acidic systems can be used. A comparative evaluation of the corrosion of steel immersed in hardened cement slurries submitted to commonly acidizing agents is suggested. The performance of Special Class Portland Cement Slurries reinforced with polished SAE 1045 steel was evaluated by electrochemical measurements as a function of time. Open circuit potential, polarization curves and electrochemical impedance spectroscopy were studied. 15.0 wt% HCl, 12.0 wt% HCl + 3.0 wt% HF (regular mud acid), 10.0 wt% HAc + 1.5 wt% HF and a simulated hardened cement slurry pore solution were used as electrolytes. The most aggressive acid solution to plain Portland hardened cement slurries was the regular mud acid. 10.0 wt% HAc + 1.5 wt% HF electrolytes were the least aggressive ones, showing open circuit potentials around +250 mV compared to -130 mV of the simulated hardened cement slurry pore solution after the first 24 hours of immersion. This behavior was observed during two months at least. Similar corrosion rates were shown between both electrolytes, around 0.01 μA.cm-2. Total impedance values, insipient arcs and large polarization resistance capacitive arcs on the Nyquist plots, indicating passivity process, confirmed the behaviour of the system in the 10.0 wt% HAc + 1.5 wt% HF electrolyte.

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40

Pikłowska, Anna, Jan Ziaja, and Marcin Kremieniewski. "Influence of the Addition of Silica Nanoparticles on the Compressive Strength of Cement Slurries under Elevated Temperature Condition." Energies 14, no. 17 (September 3, 2021): 5493. http://dx.doi.org/10.3390/en14175493.

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Drilling ever deeper, and thus in increasingly difficult conditions, is associated with restrictive requirements that must be met by cement slurries. This implies the need to use advanced, innovative measures that will significantly improve the performance parameters of the cement slurry and cement stone. Due to its unique properties, an admixture of nanosilica improves the properties of the cement stone and allows for appropriate zone insulation. The article presents the results of strength tests of cement stone samples with the addition of silica nanoparticles deposited in an environment of increased temperature of 90 °C. In all three cases of modification with an admixture of nanosilica (type 1, 2 and 3, concentration 0.5%, 1% and 5%), the cement stone shows an improvement in mechanical properties, which is manifested by an increase in compressive strength. The most homogeneous results of strength measurements are for cement slurries with an admixture of type 3 nanosilica (the highest average strength: 132–149% in relation to the base sample). They show the smallest stretch marks and deviations from the average. The highest average increase in strength is for the sample with the addition of 1% nanosilica (on average 124% in relation to the base sample). This amount causes the greatest increase in strength with no significant deterioration of rheological parameters.

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Cestari, Antonio R., Eunice F. S. Vieira, Alane A. Pinto, and Fabio C. da Rocha. "Synthesis and characterization of epoxy-modified cement slurries—Kinetic data at hardened slurries/HCl interfaces." Journal of Colloid and Interface Science 327, no. 2 (November 2008): 267–74. http://dx.doi.org/10.1016/j.jcis.2008.08.008.

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42

Lootens, D., P. Hébraud, E. Lécolier, and H. Van Damme. "Gelation, Shear-Thinning and Shear-Thickening in Cement Slurries." Oil & Gas Science and Technology 59, no. 1 (January 2004): 31–40. http://dx.doi.org/10.2516/ogst:2004004.

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43

Chernyshov, S. E., and A. A. Kynitskikh. "Development of cement slurries with adjustable kinetics of expansion." Neftyanoe khozyaystvo - Oil Industry, no. 8 (2017): 83–85. http://dx.doi.org/10.24887/0028-2448-2017-8-83-85.

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44

Shut, K. F., and V. A. Khrabrov. "Estimation of the expanding additives effectivness for cement slurries." Construction of Oil and Gas Wells on Land and Sea, no. 4 (2018): 31–34. http://dx.doi.org/10.30713/0130-3872-2018-4-31-34.

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45

Harms, W. M., and J. S. Febus. "Cementing of Fragile-Formation Wells With Foamed Cement Slurries." Journal of Petroleum Technology 37, no. 06 (June 1, 1985): 1049–57. http://dx.doi.org/10.2118/12755-pa.

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46

Smith, Benjamin J., Lawrence R. Roberts, Gary P. Funkhouser, Vijay Gupta, and Bradley F. Chmelka. "Reactions and Surface Interactions of Saccharides in Cement Slurries." Langmuir 28, no. 40 (July 26, 2012): 14202–17. http://dx.doi.org/10.1021/la3015157.

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47

Chatterji, Jiten, Bobby G. Brake, and John M. Tinsley. "4466837 Liquid water loss reducing additives for cement slurries." Marine Pollution Bulletin 16, no. 3 (March 1985): ii. http://dx.doi.org/10.1016/0025-326x(85)90544-2.

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48

Michaux, M., R. Oberste-Padtberg, and C. Defosse. "Oil well cement slurries II. Adsorption behaviour of dispersants." Cement and Concrete Research 16, no. 6 (November 1986): 921–30. http://dx.doi.org/10.1016/0008-8846(86)90016-5.

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49

Li, Yong, Ying Lan Jia, Qi Han Zhang, and Li Hui Zhang. "Composition and Evaluation of MFC-GM Plugging Agent for SeBei Gas Field." Advanced Materials Research 753-755 (August 2013): 124–29. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.124.

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To overcome the shorting of inorganic gelatinous such as cement in plugging jobs, MFC-GM plugging agent is developed. MFC-GM is composed of 20% network building material, 70% gelatinous material, 9% activators, and 1% technologic behavior regulator and is used in aqueous slurries with water to cement ratio 1:1.4-1.8. The results of laboratory performance properties evaluation show that the depth of MFC-GM slurries squeezed into sandpack is far less, and the plugging strength of MFC-GM is, about 25MPa, far higher than G grade oilwell cement. This phenomenon is explained in terms of the functions of ingredients and the structure. MFC-GM can be used for plugging perforations and water producing zones, processing following characteristics: plugging radius is less than 0.8m and adjustable; initial setting time in rang 2-6 hours adjustably. MFC-GM plugging agent can meet the needs of unconsolidated sand gas reservoirs and improve plugging effect of gas well water-flooded layer and leakage zone.

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50

Igbani, S., H. A. Ogoni, and D. Appah. "The Thickening Time of Ferrous Cement Slurry System in High-Pressure and High-Temperature Environment." Nigerian Journal of Environmental Sciences and Technology 4, no. 2 (October 2020): 351–69. http://dx.doi.org/10.36263/nijest.2020.02.0219.

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Experimentally, the aim of this research paper is to investigate the thickening time (TT) of different ferrous cement slurry systems in high-pressure and high-temperature (HPHT) environment. Objectively, the study collected eight (8) samples of groundwater from 8 different boreholes, as mix-water, from the study area, Kolo Creek. These mix-water samples were subjected to water chemistry analysis, based on the American Public Health Association (APHA) drinking water test methods; the results obtained from these tests were benchmarked with the standard values of World Health Organisation (WHO), and Nigeria Standard Drinking Water Quality (NSDWQ) standards. These results reveal that, in each of the tested mix-water samples, ferrous ion (Fe2+) concentration was higher (0.52 to 6.82mg/L); which is greater than 0.3mg/L, and this was the only chemical parameter that was in strong disagreement with the WHO’s and NSDWQ’s Drinking Water Quality standards. Subsequently, each of these ferrous mix-waters were used in the formulation of cement slurries at the water-to-cement ratio of 0.44 in batches; each of these formulated slurries were used, to test for the effects of ferrous ion concentration in mix-water on the TT performances of the slurries. These TT tests were performed using the Chandler model 7322 HPHT Consistometer. These tests were conducted based on the API Specification 10A methods of 1995. Generally, the results obtained reveal that, as the concentration of Fe2+increases in the mix-water, the TT of the cement slurry accelerated in the HPHT environment. This means that the cement slurry set faster. Also, this set-fast behaviour of high ferrous ion concentration towards slurry suggested that, high concentration of ferrous ion induced the exothermic reaction of tricalcium aluminate (C3A) during the hydration of the ferrous cement slurry. Therefore, ferrous neat cement slurry is only suitable for cementing shallow oil-well, except retarding additives are added into the slurry.

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