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Meiyu Wang - One of the best experts on this subject based on the ideXlab platform.

  • synthesis characterization and working mechanism of a novel sustained release type fluid loss additive for seawater Cement Slurry
    Journal of Colloid and Interface Science, 2018
    Co-Authors: Lei Cao, Jintang Guo, Jianhua Tia, Chu Guo, Meiyu Wang
    Abstract:

    Abstract Synthetic polymer fluid loss additive (FLA), an important type of admixture, was broadly applied in modern well Cementation. However, the filter loss volume and fluidity of Cement pastes containing polymer-FLA would deteriorate remarkably when sea water was used in mixing slurries instead of fresh water. In this study, a novel sustained-release-type fluid loss additive(S-FLA) was synthesized by means of anion-exchange intercalation reaction between an anionic type-copolymer and a calcium/aluminum type-Layered Double Hydroxide (Ca/Al-LDH). Based on the fluidity and compressive strength of experiments, it was found that in seawater mixing conditions, this composite material not only utilized its sustained release effect to significantly improve retention fluidity performance, but also the seed crystal effect of the Ca/Al-LDH effectively alleviated the declining in compressive strength of the slurries caused by the carboxyl group in the polymer. More interestingly, the realization of the slow release function increased actual adsorption capacity of the anionic polymer on the surface of Cement hydrated particles, which made its controlling water loss effect was also better than that of the conventional FLA. The above advantages of this hybrid materials created the possibility to surmount the negative effect of electrolytes present in seawater, so as to provide some useful references for its practical application in the offshore well Cement.

  • the ability of sodium metasilicate pentahydrate to adjust the compatibility between synthetic fluid loss additives and retarders applying in oil well Cement
    Construction and Building Materials, 2018
    Co-Authors: Jianhua Tian, Miaomiao Hu, Yang Xu, Meiyu Wang
    Abstract:

    Abstract Sodium metasilicate pentahydrate (SMP), a type of hardening-accelerator, was widely used in Cement Slurry to enhance its early strength. In this study, we found that SMP had an novel ability to adjust the compatibility between 2-Acrylamido-2-Methyl Propane Sulfonic Acid (AMPS)-based Fluid Loss Additive (FLA) and Retarder in oil well Cement. Reasons for this significance were proposed, that SMP promoted the formation and growth of hydration products by accelerating the hydration velocity of Cement Slurry, which increased the adsorption sites of Cement hydration products. As that happens, the more AMPS-based polymers were adsorbed simultaneously on the surface of the hydration product, thereby effectively improving the compatibility problem caused by the competitive adsorption between the admixtures. Meanwhile, while SMP speeded up the hydration reaction, the pores space of Cement hydrated particles were filled with more hydrates and consequently altered its pore size distribution, whose action was also beneficial to the development of early strength. Overall, those findings will provide further interpretation for the effect of admixture on Cement hydration products and offer some useful references for practical application of oil well Cementing in the future.

Osei Edward - One of the best experts on this subject based on the ideXlab platform.

  • Evaluation of blended lime-stabilised spent synthetic-based drilling mud and Cement for oil well Cementing operations
    'Ausasia Science and Technology Press Pty Ltd.', 2019
    Co-Authors: Amori Richard, Appau, Prince Opoku, Osei Edward
    Abstract:

    Most current oil and gas wells are drilled with synthetic-based muds. During drilling, two types of wastes: spent muds and drilled cuttings, are generally generated. Several methods are used in the treatment of these wastes. However, after treatment of these wastes, they are disposed into the environment. Although they seem to be environmentally friendly, greater accumulation may degrade the environment. Nonetheless, some additives used in Cement Slurry formulation are also present in most of the spent drilling muds, therefore they could be stabilised for reuse in oil and gas wells Cementing operations. In recent times, lime is used to stabilise spent synthetic-based drilling mud before disposal or for further treatment. These lime-stabilised muds find use as feedstock of Cement kiln, raw material for the production of construction material and wetland restoration materials. This research studies the performance of blended lime-stabilised drilling mud and Cement at varied concentrations for oil and gas wells Cementing operations. The Cement was blended with lime-stabilised mud with concentrations from 0% to 100% at a step of 10% and their properties evaluated. Slurry properties like density, free fluid, rheology and compressive strength results obtained showed that these properties decreased with the increase in percentage blend of the lime-stabilised spent synthetic-based mud. However, it was observed that concentrations of 10% and 20% blends of lime-stabilised mud with Cement performed better with good potential to be considered in minor Cementing works by the industry to help reduce the cost of waste management.Cited as: Amorin, R., Opoku Appau, P., Osei, E. Evaluation of blended lime-stabilised spent synthetic-based drilling mud and Cement for oil well Cementing operations. Advances in Geo-Energy Research, 2019, 3(2): 141-148, doi: 10.26804/ager.2019.02.03

Edward Osei - One of the best experts on this subject based on the ideXlab platform.

  • Evaluation of blended lime-stabilised spent synthetic-based drilling mud and Cement for oil well Cementing operations
    Ausasia Science and Technology Press, 2019
    Co-Authors: Richard Amori, Prince Opoku Appau, Edward Osei
    Abstract:

    Most current oil and gas wells are drilled with synthetic-based muds. During drilling, two types of wastes: spent muds and drilled cuttings, are generally generated. Several methods are used in the treatment of these wastes. However, after treatment of these wastes, they are disposed into the environment. Although they seem to be environmentally friendly, greater accumulation may degrade the environment. Nonetheless, some additives used in Cement Slurry formulation are also present in most of the spent drilling muds, therefore they could be stabilised for reuse in oil and gas wells Cementing operations. In recent times, lime is used to stabilise spent synthetic-based drilling mud before disposal or for further treatment. These lime-stabilised muds find use as feedstock of Cement kiln, raw material for the production of construction material and wetland restoration materials. This research studies the performance of blended lime-stabilised drilling mud and Cement at varied concentrations for oil and gas wells Cementing operations. The Cement was blended with lime-stabilised mud with concentrations from 0% to 100% at a step of 10% and their properties evaluated. Slurry properties like density, free fluid, rheology and compressive strength results obtained showed that these properties decreased with the increase in percentage blend of the lime-stabilised spent synthetic-based mud. However, it was observed that concentrations of 10% and 20% blends of lime-stabilised mud with Cement performed better with good potential to be considered in minor Cementing works by the industry to help reduce the cost of waste management

M Ukowska - One of the best experts on this subject based on the ideXlab platform.

  • hydration of Cement Slurry in the presence of spent cracking catalyst
    Journal of Thermal Analysis and Calorimetry, 2000
    Co-Authors: Arbara Pacewska, Iwona Wilinska, M Ukowska
    Abstract:

    The physicochemical properties of spent fluidized bed cracking catalyst and its influence on hydration process of Cement Slurry were studied. The samples were Cement slurries prepared with water/solid=0.5 and additions of used catalyst amounted to 0, 5, 10, 15, 20 and 25%with resp. to the solid. After definite time they were subjected to thermogravimetric analysis (TG, DTG, DTA) and, in order to determine the progress of reaction with water, the heat of hydration was measured by means of isotherm calorimetry. The studies disclosed that the spent cracking catalyst is not merely an inactive filler in Cement slurries, but it modifies the course of the hydration process. The spent catalyst is a pozzolana additive and its presence leads to a decrease of calcium hydroxide contents in the system. The spent catalyst affect on the heat of Cement hydration. Small amounts additive accelerate the process of binding.

Ahmed Mohammed - One of the best experts on this subject based on the ideXlab platform.

  • magnetic field strength and temperature effects on the behavior of oil well Cement Slurry modified with iron oxide nanoparticles and quantified with vipulanandan models
    Journal of Testing and Evaluation, 2020
    Co-Authors: C Vipulananda, Ahmed Mohammed
    Abstract:

    The focus of this study was to investigate the methods that could potentially be easy to adopt in field to modify Cement Slurry rheological properties in situ during the installation of oil and gas wells. In this study, we investigated the effects of magnetic field strengths and temperatures on the rheological properties of an oil well Cement (Class H) modified with iron oxide nanoparticles (NanoFe2O3). Also, the sensitivity of using electrical resistivity in monitoring changes in the Cement Slurry was also investigated. The water-to-Cement ratio used in this study was 0.38, since it is a popular ratio used in oil well Cementing. The NanoFe2O3 contents (average particle size of 30 nm) in the Cement Slurry were varied up to 1 % by the weight of Cement. The temperature was varied from 25°C to 85°C. The magnetic field strength was varied up to 0.6 T. The initial electrical resistivity of the Cement Slurry modified with NanoFe2O3 decreased by 6 % to 52 % based on the NanoFe2O3 content, temperature, and magnetic field strength. The shear thinning behavior of the Cement Slurry with and without NanoFe2O3 has been quantified using the Vipulanandan rheological model and compared to the Herschel-Bulkley model. The results show that the Vipulanandan rheological model predicted the shear thinning relationship between the shear stress and shear strain rate of the NanoFe2O3-modified Cement Slurry very well with the maximum shear stress tolerance. The rheological properties of the Cement Slurry modified with NanoFe2O3 under different magnetic field strengths have been correlated to the electrical resistivity of the Cement Slurry using a nonlinear resistivity and Vipulanandan property correlation models. Thus, the performance of the Cement Slurry with and without NanoFe2O3 can be characterized based on the electrical resistivity, which can be used as a real-time monitoring tool in the field.

  • rheological properties of piezoresistive smart Cement Slurry modified with iron oxide nanoparticles for oil well applications
    Journal of Testing and Evaluation, 2017
    Co-Authors: C Vipulananda, Ahmed Mohammed
    Abstract:

    In this study, rheological properties and piezoresistivity of the oil-well smart Cement Slurry modified with iron-oxide nanoparticles (NanoFe2O3) at a water-to-Cement ratio of 0.38 were investigated. Series of experiments were performed immediately after mixing to evaluate the piezoresistivity of the smart Cement Slurry with 0.1 % of conductive filler (CF) and up to 1 % NanoFe2O3 to identify the most reliable sensing property that can be relatively easily monitored. To evaluate the piezoresistive behavior the applied pressure was varied up to 5.5 MPa for the smart Cement slurries with and without NanoFe2O3 in the high-pressure–high-temperature cylinder where a two-probe method was used with the impedance spectroscopy (IS) to measure the resistivity of the Slurry. The shear-thinning behavior of the smart Cement slurries, with and without NanoFe2O3, have been quantified using the new hyperbolic rheological model and compared with the Vocadlo model with three material parameters. The results showed that the hyperbolic rheological model predicated the shear-thinning relationship between the shear-stress and shear-strain rate of the smart Cement slurries very well. Based on the hyperbolic rheological model the maximum shear stresses produced by the smart Cement slurries modified with 0 %, 0.1 %, 0.5 %, and 1 % were 183 Pa, 199 Pa, 232 Pa, and 300 Pa, respectively. The resistivity of the basic Cement Slurry did not change with pressure. The electrical resistivity of the smart Cement slurries with and without NanoFe2O3 decreased with increasing the pressure. The smart Cement without and with 1 % NanoFe2O3 additive changed its resistivity by 14 % and 24 %, respectively, when the pressure was increased to 5.5 MPa. A piezoresistivity (stress-resistivity) model was developed to predict the observed piezoresistive behavior of the smart Cement Slurry and can be used to predict the pressure on the smart Cement.