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Robberstad Carina - One of the best experts on this subject based on the ideXlab platform.
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An evaluation of emerging technologies in kinetic inhibitors incorporating various amphiphilic molecules to reveal interactions and possible synergies in those, intended for use in an aqueous Base Drilling Fluid.
Norwegian University of Life Sciences Ås, 2013Co-Authors: Robberstad CarinaAbstract:M-I SWACO, A Schlumberger Company, ønsker herved båndpålegging av overnevnte masteroppgave i 5 år. Bakgrunn for dette er at arbeidet utført i masteroppgaven er en liten del av et større prosjekt omhandlende evaluering av kinetiske gasshydrat inhibitorer i kombinasjon med surfaktanter, anti-agglomeranter og andre potensielle synergister. Prosjektet er fremdeles i startfasen og beregnes å fortsette noen år fremover. En eventuell offentliggjøring av resultatene/teoriene fra masteroppgaven vil medføre betydelige tap for bedriften, ettersom dette blant annet beskriver utvikling av, og resultater fra en ny metode for gasshydrat testing. Bedriften ønsker å unngå en offentliggjøring på dette stadiet, og søker dermed en båndlegging i 5 år.Water-Based Drilling Fluids are primarily chosen for Drilling of deep water wells in the North Sea Region, and thermodynamic inhibitors like monoethylene glycol (MEG) and KCl are the only sufficient hydrate inhibitors used. With the exploration in deeper waters there is an increased demand for hydrate inhibitive Drilling Fluids with lower density than those typically formulated with high salt concentrations. Use of MEG is occasionally also a controversial choice while Drilling kaolinite- and illite-rich clays, as the glycol has dispersive effect on those formations causing frequent problems with bit balling and high dilution rates. The environmental impacts, the high dosages used, and the high costs associated with MEG present additional disadvantages. The background for this project was to investigate a broader range of gas hydrate inhibitors in search for Fluids which can handle this new challenges.Gasshydrater er et is-liknende faste stoffer som dannes som følge av at naturgass og vann reagerer under høyt trykk og lav temperatur. Faren for potensiell dannelse av gass hydrater er et økende problem ettersom vannBaserte væskesystemer blir mer og mer hyppig brukt ved dypvannsboring i Nordsjøen. VannBaserte borevæsker er mer foretrukket enn oljeBaserte borevæsker på grunn deres lave giftighet for miljøet. Det høye vanninnholdet i disse borevæskene er en utmerket kilde til dannelse av gasshydrater. I dag brukes termodynamiske inhibitorer som monoetylen glykol (MEG) og KCl. Disse er de eneste tilstrekkelige inhibitorene. Et høyt saltinnhold vil gi en for høy tetthet til å bli brukt i lavtetthets borevæsker for dypvannsboring. Bruken av MEG vil gi uønskede reaksjoner med kaolinitt- of illitt-rike leirer og har dispergerende effekt på disse formasjonene, noe som vanligvis forårsaker problemer med agglomerering av borekaks på borekronen og høye fortynningsrater. MEG blir også brukt i høye doser og er giftig for miljøet. Bruken av lav-dose kinetiske inhibitorer er vanligvis brukt i borevæsker idag på grunn av deres lave dosering og lave giftighet. Problemet ved bruken av disse inhibitorene er at de ikke gir en høy nok grad av ”subcooling” under disse ekstreme forholdene. Bakgrunnen for dette prosjektet var å undersøke et bredere utvalg av gasshydrat-inhibitorer for å erstatte de tradisjonelt brukte termodynamiske inhibitorene, for å finne væsker som kan takle disse nye utfordringene.M-I SWACO2018-01-0
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An evaluation of emerging technologies in kinetic inhibitors incorporating various amphiphilic molecules to reveal interactions and possible synergies in those, intended for use in an aqueous Base Drilling Fluid.
Norwegian University of Life Sciences Ås, 2013Co-Authors: Robberstad CarinaAbstract:Water-Based Drilling Fluids are primarily chosen for Drilling of deep water wells in the North Sea Region, and thermodynamic inhibitors like monoethylene glycol (MEG) and KCl are the only sufficient hydrate inhibitors used. With the exploration in deeper waters there is an increased demand for hydrate inhibitive Drilling Fluids with lower density than those typically formulated with high salt concentrations. Use of MEG is occasionally also a controversial choice while Drilling kaolinite- and illite-rich clays, as the glycol has dispersive effect on those formations causing frequent problems with bit balling and high dilution rates. The environmental impacts, the high dosages used, and the high costs associated with MEG present additional disadvantages. The background for this project was to investigate a broader range of gas hydrate inhibitors in search for Fluids which can handle this new challenges
Hu You-lin - One of the best experts on this subject based on the ideXlab platform.
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Rheological Properties of Water Based Drilling Fluid in Deep Water Drilling Conditions
2016Co-Authors: Yue Qian-sheng, Yang Qingzhi, Liu Shu-jie, He Bao-sheng, Hu You-linAbstract:viscosity-temperature properties Abstract: The rheological property of the Drilling Fluid was one of the focus problems in deep-water Drilling, which was widely concerned. In the article, the viscosity-temperature properties of commonly used water soluble polymeric solution, polymeric brine solution, bentonite slurry, polyacrylamide-potassium chloride Drilling Fluid with different densities and water-Base Drilling Fluid systems commonly used for China offshore well Drillings were studied. 4℃-to-20 ℃ viscosity ratio and 4℃-to-20 ℃ YP ratio were used to judge the thickening level of Drilling Fluids due to low temperature. The experimental results show that on the condition of without considering the influence of pressure on the rheological property of water-Base Drilling Fluid, its viscosity and yield point raised obviously with the decrease of temperature, but the increase level is proximately the same, its 4℃-to-20 ℃ apparent viscosity ratio is basically within the 1.50. Analysis indicates that the viscosity of water-Base Drilling Fluid depends on the viscosity of dispersed media. The performance of water medium determines the viscosity-temperature property of the water-Based Drilling Fluid. It is proposed that in deep water Drillings, if a water-Base Drilling Fluid is used, it is not necessary to emphasize the influence of deep water and low temperature on the flowability. On the condition of guaranteeing wellbore stability and borehole cleaning, it is more suitable for using the water-Base Drilling Fluid with low viscosity and low gel strength for deep water well Drillings
Ebrahim Biniaz Delijani - One of the best experts on this subject based on the ideXlab platform.
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Experimental study on thermal, rheological and filtration control characteristics of Drilling Fluids: effect of nanoadditives
Oil & Gas Science and Technology - Revue d'IFP Energies nouvelles, 2020Co-Authors: Erfan Veisi, Mastaneh Hajipour, Ebrahim Biniaz DelijaniAbstract:Cooling the drill bit is one of the major functions of Drilling Fluids, especially in high temperature deep Drilling operations. Designing stable Drilling Fluids with proper thermal properties is a great challenge. Identifying appropriate additives for the Drilling Fluid can mitigate drill-bit erosion or deformation caused by induced thermal stress. The unique advantages of nanoparticles may enhance thermal characteristics of Drilling Fluids. The impacts of nanoparticles on the specific heat capacity, thermal conductivity, rheological, and filtration control characteristics of water‐Based Drilling Fluids were experimentally investigated and compared in this study. Al2O3, CuO, and Cu nanoparticles were used to prepare the water-Based Drilling nanoFluid samples with various concentrations, using the two-step method. Transmission Electron Microscopy (TEM) and X-Ray Diffraction (XRD) were utilized to study the nanoparticle samples. The nanoFluids stability and particle size distribution were, furthermore, examined using Dynamic Light Scattering (DLS). The experimental results indicated that thermal and rheological characteristics are enhanced in the presence of nanoparticles. The best enhancement in Drilling Fluid heat capacity and thermal conductivity was obtained as 15.6% and 12%, respectively by adding 0.9 wt% Cu nanoparticles. Furthermore, significant improvement was observed in the rheological characteristics such as the apparent and plastic viscosities, yield point, and gel strength of the Drilling nanoFluids compared to the Base Drilling Fluid. Addition of nanoparticles resulted in reduced Fluid loss and formation damage. The permeability of filter cakes decreased with increasing the nanoparticles concentration, but no significant effect in filter cake thickness was observed. The results reveal that the application of nanoparticles may reduce drill-bit replacement costs by improving the thermal and Drilling Fluid rheological characteristics and decrease the formation damage due to mud filtrate invasion.
Pryazhnikov M. - One of the best experts on this subject based on the ideXlab platform.
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Experimental study of temperature dependence of Drilling Fluids viscosity with nanoparticles
'IOP Publishing', 2021Co-Authors: Mikhienkova E., Minakov A., Matveev A., Pryazhnikov M.Abstract:This research is focused on the dependence of viscosity of water-Based Drilling Fluid modified by nanoparticles on temperature. Silicon oxide of 10 nm size was used as nanoparticles. The nanosuspensions were prepared for nanoparticle concentrations from 0.25 to 3 wt%. An aqueous solution of bentonite with a mass fraction of 5 % was used as a Base Drilling Fluid. Rheological studies were conducted at varying temperatures (25, 40, 55 and 80 °C). The dependences of the effective viscosity of these suspensions on the concentration of nanoparticles and temperature have been obtained
Yue Qian-sheng - One of the best experts on this subject based on the ideXlab platform.
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Rheological Properties of Water Based Drilling Fluid in Deep Water Drilling Conditions
2016Co-Authors: Yue Qian-sheng, Yang Qingzhi, Liu Shu-jie, He Bao-sheng, Hu You-linAbstract:viscosity-temperature properties Abstract: The rheological property of the Drilling Fluid was one of the focus problems in deep-water Drilling, which was widely concerned. In the article, the viscosity-temperature properties of commonly used water soluble polymeric solution, polymeric brine solution, bentonite slurry, polyacrylamide-potassium chloride Drilling Fluid with different densities and water-Base Drilling Fluid systems commonly used for China offshore well Drillings were studied. 4℃-to-20 ℃ viscosity ratio and 4℃-to-20 ℃ YP ratio were used to judge the thickening level of Drilling Fluids due to low temperature. The experimental results show that on the condition of without considering the influence of pressure on the rheological property of water-Base Drilling Fluid, its viscosity and yield point raised obviously with the decrease of temperature, but the increase level is proximately the same, its 4℃-to-20 ℃ apparent viscosity ratio is basically within the 1.50. Analysis indicates that the viscosity of water-Base Drilling Fluid depends on the viscosity of dispersed media. The performance of water medium determines the viscosity-temperature property of the water-Based Drilling Fluid. It is proposed that in deep water Drillings, if a water-Base Drilling Fluid is used, it is not necessary to emphasize the influence of deep water and low temperature on the flowability. On the condition of guaranteeing wellbore stability and borehole cleaning, it is more suitable for using the water-Base Drilling Fluid with low viscosity and low gel strength for deep water well Drillings