Academic literature on the topic 'Inter-laboratory test comparison'

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Journal articles on the topic "Inter-laboratory test comparison"

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Holmgren, Magnus, Klas Johansson, Erland Johnson, and Thomas Svensson. "Inter-laboratory comparison of a fatigue test." Materials Testing 47, no. 9 (2005): 529–33. http://dx.doi.org/10.3139/120.100683.

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Byrne, David C., William J. Murphy, Edward F. Krieg, et al. "Inter-laboratory comparison of three earplug fit-test systems." Journal of Occupational and Environmental Hygiene 14, no. 4 (2017): 294–305. http://dx.doi.org/10.1080/15459624.2016.1250002.

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Velychko, Oleh, Tetyana Gordiyenko, and Stanislav Karpenko. "Evaluation of the results of regional metrology organisation comparisons and national inter-laboratory comparisons for electrical quantities." ACTA IMEKO 9, no. 2 (2020): 18. http://dx.doi.org/10.21014/acta_imeko.v9i2.763.

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The global metrological traceability fully depends on the implementation of international mutual recognition agreements in field of metrology. The linked results of international comparisons of national standards for alternating current/direct current (AC/DC) voltage transfer difference measurements and electrical power measurements, and national inter-laboratory comparison AC/DC voltage transfer difference and electrical power measurements at industrial frequency was presented. The main goal of this inter-laboratory comparison was the assessment of calibration laboratories capabilities that perform calibration in AC/DC voltage transfer difference and electrical power measurements. The consistency of the data obtained using the En numbers and Chi² test was estimated.
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Mearns, A. J., R. C. Swartz, J. M. Cummins, P. A. Dinnel, P. Plesha, and P. M. Chapman. "Inter-laboratory comparison of a sediment toxicity test using the marine amphipod, Rhepoxynius abronius." Marine Environmental Research 19, no. 1 (1986): 13–37. http://dx.doi.org/10.1016/0141-1136(86)90037-1.

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Keppens, Cleo, Sid Scudder, Partha Das, et al. "P3.02b-043 Inter-Laboratory Comparison of the Roche Cobas EGFR Mutation Test v2 in Plasma." Journal of Thoracic Oncology 12, no. 1 (2017): S1213. http://dx.doi.org/10.1016/j.jtho.2016.11.1710.

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Jercic, María Isabel, Graciela Santillan, Susana Elola, et al. "First inter-laboratory comparison of Echinococcus granulosus sensu lato diagnosis in Latin America." Revista Panamericana de Salud Pública 43 (December 9, 2019): 1. http://dx.doi.org/10.26633/rpsp.2019.89.

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Objective. To compare the performance of polymerase chain reaction (PCR) and enzyme-linked immunosorbent assay (ELISA) tests for diagnosing Echinococcus granulosus in dog feces among national reference laboratories in Argentina, Chile, Peru, and Uruguay. Methods. National laboratories affiliated with the Ministry of Health/Agriculture of each country exchanged panels of 10 positive/negative samples obtained from their regular national surveillance programs in November 2015 – November 2016. All laboratories applied PCR; two also applied ELISA techniques. Sensitivity and specificity were determined for each laboratory and concordance of results among the laboratories was evaluated by Cohen Kappa coefficient. Results. Poor concordance (3 of 10 paired comparisons had values of Kappa > 0.4), low sensitivity and specificity across all laboratories, and poor performance of both techniques in detecting E. granulosus in canine feces was demonstrated in this study. An ex-post comparison of the laboratories’ test protocols showed substantial heterogeneity that could partially explain poor concordance of results. Conclusion. The results underscore the heterogeneity of canine echinococcosis diagnosis across the region and indicate possible sources of variability. Efforts to standardize canine echinococcosis testing must be included in the plan of action for the Regional Initiative for the Control of Cystic Echinococcosis. Future comparisons with fecal samples of known parasite load are needed.
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Scherer, Gerhard, Wolf-Dieter Heller, Michael McEwan, et al. "An Inter-Laboratory Comparison for the Urinary Acrolein Biomarker 3-Hydroxypropyl-Mercapturic Acid (3-HPMA)." Beiträge zur Tabakforschung International/Contributions to Tobacco Research 27, no. 5 (2017): 65–76. http://dx.doi.org/10.1515/cttr-2016-0006.

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Summary An inter-laboratory comparison study on the acrolein biomarker of exposure 3-hydroxypropyl-mercapturic acid (3-HPMA) with 12 laboratories from 7 globally distributed countries was performed. The laboratories received coded triplicates of 4 spiked and lyophilized urine samples (LU, 12 samples) as well as 5 authentic urine pool samples (PU, 15 samples) covering the 3-HPMA concentration range from background (non-smoking) to heavy smoking levels for analysis by using their own (in-house) analytical method. All laboratories applied liquid chromatography with tandem mass spectrometry (LC-MS/MS), with most of them (10 of 12) using solid phase extraction (SPE) as sample work-up procedure. The intra-laboratory variation (indicating repeatability) was determined by calculating the standard deviation (sr) and the coefficient of variation (CVr) of the triplicates, whereas the inter-laboratory variation (indicating reproducibility) was determined by calculating the standard deviation between laboratories (sR) and the corresponding coefficient of variation (CVR). After removal of outlier samples or laboratories, the mean CVr values for LU and PU test samples ranged from 2.1–3.6% (mean: 2.8%) and 2.4–3.7% (mean: 3.3%), respectively, indicating good repeatability for the determination of 3-HPMA in both sample types. CVR for LU and PU test samples ranged from 9.1–31.9% (mean: 18.8%) and 13.9–27.0% (mean: 18.5%), respectively, indicating limited reproducibility in 3-HPMA analysis for both sample types. Re-calculation of the PU results by applying an embedded calibration (EC), derived from the reported peak areas for the LU test samples, somewhat improved the CVR values (range: 9.6–28.8%, mean: 16.7%). It is concluded that the intra-laboratory variation (repeatability) in the determination of 3-HPMA in urine is in general acceptable in the participating laboratories, while the inter-laboratory variability requires further improvement. The relatively small reduction in the inter-laboratory variability (sR and CVR) by applying an EC suggests that other methodological factors than the standard reference material for 3-HPMA have to be addressed to achieve further improvement in reproducibility.
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Guerrero Peña, Armando, Aarón Jarquín Sánchez, Jorge D. Etchevers Barra, et al. "Evaluación de la calidad de la medición de carbono total en suelo mediante ensayo de intercomparación." REVISTA TERRA LATINOAMERICANA 37, no. 3 (2019): 273. http://dx.doi.org/10.28940/terra.v37i3.377.

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The Mexican regulation NMX-EC-17025-IMNC-2006, establishes that laboratories must have quality control procedures to monitor the validity of tests and calibrations, such monitoring must be planned and reviewed with: a) the regular use of certif ied reference materials or internal quality control of secondary references; b) participation in inter-laboratory comparisons or a prof iciency testing program; c) the repetition of tests or calibrations using the same method or different methods; d) the repetition of the test or the calibration of determined objects; e) the correlation of results for different characteristics of a reference material certif ied by MRC. The quality evaluation of results from the eight laboratories of the Laboratory Network for Analysis, Use, Conservation and Management of Soil (REDLABS) included the elements of sections a), b), c), and d) in order to verify the hypothesis that laboratories emit repeatable, reproducible and unbiased results. In our study, elemental analyzers of different brands were used to measure the total carbon of soil. A certif ied reference material was included in the Inter-comparison Practice. Repeatability and reproducibility of the carbon analyzes were evaluated with samples from the inter-comparison practice; the precision of analyzes from each laboratory was qualif ied with MRC. The results obtained indicate that the laboratories show repeatability in their analyzes with no statistical differences, i.e. reproducibility is detected by inter-comparison. The data issued by the laboratories were unbiased according to their evaluation with certif ied reference material.
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Belyaev, Alexey P. "Inter-Laboratory collation testing as a method of improvement of objectivity of technical expertise." Butlerov Communications 57, no. 3 (2019): 120–27. http://dx.doi.org/10.37952/roi-jbc-01/19-57-3-120.

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The results of the interlaboratory comparison tests of experimental laboratories that analyzed vodka produced and sold in the Russian Federation for human consumption are presented in order to demonstrate the capabilities of the comparison tests. The choice of vodka as a model object was determined, on the one hand, by its definite proximity to medicinal substances, and on the other, by its assignment as food product, for which the regulatory framework for interlaboratory comparison tests was developed in sufficient detail. The following controlled indicators were examined: strength, alkalinity, mass concentration of acetaldehyde, mass concentration of acetic aldehyde, mass concentration of fusel oil, mass concentration of esters (methyl acetate, ethyl acetate), volume fraction of methyl alcohol in terms of anhydrous alcohol. 30 experimental laboratories are involved in the interlaboratory comparison tests. All participants guided by the same regulatory documents. The test results are processed statically in accordance with the regulatory framework developed for food products. It demonstrated that the majority of participants in the interlaboratory comparison tests successfully coped with the task of testing vodka under the conditions of reproducibility of the analytical method, and recommendations were made to correct the activities of testing laboratories for the rest. The diagrams were constructed to demonstrate visually checks on the quality of tests in determining strength, in determining alkalinity, in determining the mass concentration of acetic aldehyde, in determining the mass concentration of fusel oil and in determining the volume fraction of methyl alcohol in terms of anhydrous alcohol. The results of statistical processing allowed to state that interlaboratory comparison tests correctly and visually assess the competence of the activities of experimental laboratories, allow to plan actions preventive violations in the objectivity of the work of experimental laboratories. It is shown that the introduction of the practice of experimental laboratories working in the field of production and circulation of medicinal substances, interlaboratory comparison tests can be one of the possible ways to improve the quality of medicinal substancesThe opinion was expressed that for testing interlaboratory comparison tests in the production and circulation of medicinal substances one can use the regulatory framework developed for food products.
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Browning, Clare F. J., Antonello Di Nardo, Lissie Henry, et al. "Inter-laboratory comparison of 2 ELISA kits used for foot-and-mouth disease virus nonstructural protein serology." Journal of Veterinary Diagnostic Investigation 32, no. 6 (2020): 933–37. http://dx.doi.org/10.1177/1040638720962070.

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Serologic assays used to detect antibodies to nonstructural proteins (NSPs) of foot-and-mouth disease virus (FMDV) are used for disease surveillance in endemic countries, and are essential to providing evidence for freedom of the disease with or without vaccination and to recover the free status of a country after an outbreak. In a 5-site inter-laboratory study, we compared the performance of 2 commercial NSP ELISA kits (ID Screen FMD NSP ELISA single day [short] and overnight protocols, ID.Vet; PrioCHECK FMDV NS antibody ELISA, Thermo Fisher Scientific). The overall concordance between the PrioCHECK and ID Screen test was 93.8% (95% CI: 92.0–95.2%) and 94.8% (95% CI: 93.1–96.1%) for the overnight and short ID Screen incubation protocols, respectively. Our results indicate that the assays (including the 2 different formats of the ID Screen test) can be used interchangeably in post-outbreak serosurveillance.
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Dissertations / Theses on the topic "Inter-laboratory test comparison"

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Ulker, Elcin. "Comparison Of Compressive Strength Test Procedures For Blended Cements." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612506/index.pdf.

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The aim of this thesis is to twofold, in order to demonstrate the variabilities that can be faced within the compressive strength of blended cements, one blended cement namely CEM IV / B (P-V) 32.5N is selected and the 28-day compressive strength is obtained by 16 different laboratories following TS EN 196-1 standard. Later, to show the variabilities that could be faced by different standards, three different cement types were selected and their compressive strengths are determined following two procedures first with TS EN 196-1, later with similar procedure described in ASTM. The strength of cement is determined by TS EN 196-1 in Turkey that is the same for all types of cements. However, American cement producers use different standards for testing the strength of Portland cement and blended cements. The main difference is the amount of water utilized in producing the cement mortar. It was observed that for Portland and Portland composite cements<br>there is not any significant difference in between the compressive strength results of cement mortars prepared by both methods. However, for pozzolanic cements, there is much deviance in the compressive strength results of cement mortars prepared by TS EN 196-1.
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Book chapters on the topic "Inter-laboratory test comparison"

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Lixin, Peng, and Xu Danian. "The Application of LC/ES-MS in the OPCW/PTS Inter-Laboratory Comparison Test." In Analytical Chemistry Associated with the Destruction of Chemical Weapons. Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5600-4_19.

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Fukui, Satoshi, Kazuaki Negishi, Osami Tsukamoto, et al. "Inter-laboratory Comparison Test Results for Sustainable Current Measurement of AC Nb-Ti Composite SC Wires." In Advances in Superconductivity XII. Springer Japan, 2000. http://dx.doi.org/10.1007/978-4-431-66877-0_210.

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Conference papers on the topic "Inter-laboratory test comparison"

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Sönmez, K. Berk, T. Oytun Kılınç, İ. Ahmet Yüksel, and Sinem Ön Aktan. "Inter-laboratory comparison on the calibration of measurements photometric and radiometric sensors." In 19th International Congress of Metrology (CIM2019), edited by Sandrine Gazal. EDP Sciences, 2019. http://dx.doi.org/10.1051/metrology/201910004.

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The competences of the test and calibration laboratories are provided by two complementary methods. The first of these methods is the on-site audit carried out by the administrative and technical committee established by TURKAK (Turkish Accreditation Institution) according to the requirements of TS EN ISO / IEC 17025 [1]. The other technique is interlaboratory comparison and proficiency testing to evaluate laboratory performance and ensure the quality of results. Investing in the right equipment, training personnel, defining methods, documenting, calculating uncertainty, even performing internal verifications do not guarantee reliability or accuracy. It cannot answer the question of whether we can produce the same results as the same testers in the world. It is necessary to prove that the laboratory can actually produce accurate results externally by going through comparison tests with other national/international laboratories.
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Osabe, Kunihiro, Rikio Watanabe, Atsuya Maeda, and Masanori Yamaguchi. "Inter-laboratory Comparison Result as the Proficiency Testing Program of EMI Test Sites in Japan." In 2007 IEEE International Symposium on Electromagnetic Compatibility. IEEE, 2007. http://dx.doi.org/10.1109/isemc.2007.239.

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Maeda, Atsuya, Shuichi Kobayashi, and Rikio Watanabe. "Development of artifact for inter-laboratory comparison for the purpose of improving reproducibility of radiated emission test." In 2015 Asia-Pacific Symposium on Electromagnetic Compatibility (APEMC). IEEE, 2015. http://dx.doi.org/10.1109/apemc.2015.7175279.

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Roberts, Rory A., Faryar Jabbari, Jacob Brouwer, Randall S. Gemmen, and Eric A. Liese. "Inter-Laboratory Dynamic Modeling of a Carbonate Fuel Cell for Hybrid Application." In ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/gt2003-38774.

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A detailed comparison of dynamic models developed for carbonate fuel cells used in hybrid fuel cell gas turbine systems is presented. The two models are nearly similar in that both treat the bulk behavior of the system (e.g., through lumped or one-dimensional solutions of the fundamental equations. However, both models are implemented independently by different research groups using disparate simulation software programs. As a test case for the comparison, a generic molten carbonate hybrid fuel cell gas turbine system is identified. Such comparison-work benefits all parties by ensuring sub-model reliability prior to integration into a complete hybrid system model. Detailed results for the carbonate fuel cell models are presented. For a generic planar design, voltage and current behavior are shown following step changes in load resistance and fuel flow. The time scales for thermal dynamic response are much greater than those required for the initial electrochemical dynamic response as is expected. These results provide understanding of some of the operational characteristics of fuel cells and indicate the complexity of the dynamic response of fuel cell hybrid components. The results from the two models are not identical, but compare sufficiently well to provide confidence in each of the model’s reliability, enabling them to be integrated for hybrid system simulation. Results from the integrated simulations will provide guidance on future hybrid technology development needs.
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Tas, Emrah, and Frederic Pythoud. "A new conducted immunity test device for inter-laboratory comparisons." In 2015 IEEE International Symposium on Electromagnetic Compatibility - EMC 2015. IEEE, 2015. http://dx.doi.org/10.1109/isemc.2015.7256276.

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Hilavin, Sezgin, Emre Alan, Faik Alan, and Samet Develi. "Analysis of effects of variable parameters on inter-laboratory comparisons for radiated emission test." In 2017 IV International Electromagnetic Compatibility Conference (EMC Turkiye). IEEE, 2017. http://dx.doi.org/10.1109/emct.2017.8090365.

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Server, William, Mikhail Sokolov, Masato Yamamoto, and Robert Carter. "Inter-Laboratory Results and Analyses of Mini-C(T) Specimen Testing of an Irradiated Linde 80 Weld Metal." In ASME 2018 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/pvp2018-84950.

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An irradiated low-upper-shelf Linde 80 weld metal has been tested by four laboratories as part of an inter-laboratory assessment of use of the miniature compact tension [mini-C(T)] test specimen for Master Curve fracture toughness evaluation following ASTM E1921. The preliminary results from each of the laboratories have been compiled and evaluated together to assess the validity and use of the mini-C(T) specimen for an irradiated reactor pressure vessel material which can exhibit ductile crack growth at low temperatures relative to cleavage initiation fracture toughness. The preliminary results from this mini-C(T) testing can also be compared to extensive specimen test results from larger C(T) specimens of the same irradiated material. Comparisons of the results from each of the laboratories and some inter-laboratory differences in the fracture testing are assessed. The evaluations indicate reasonable agreement between the mini-C(T) and larger specimen results, but the selection of test temperature and the number of test specimens needed to obtain reliable results are more difficult when testing a low-upper-shelf toughness material.
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Bagepalli, B. S., S. Dinc, B. Jlidi, I. Imam, J. Barnes, and C. Slocum. "Simulation of Large and Complex Structures With Multiple Contacts and Wear." In ASME 1992 International Computers in Engineering Conference and Exposition. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/cie1992-0025.

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Abstract This paper deals with the simulation methodology of large and complex structures with multiple contacts and wear. The methodology developed is used to evaluate the dynamics and wear of gas turbine combustors. A unified approach of representing multiple rigid/elastic bodies with numerous contacts is developed. Representation is made, too, of the changing nature of these contacts — both geometric and material. The entire methodology is implemented in a generic and easy-to-use simulation code which serves as a useful generic design/analysis evaluation tool MAP (Mechanism Analysis Program). Appropriate analytical models for inter-material constitutive laws — both incremental (contact friction, pressure, damping, etc.) and cumulative (wear theories) — are incorporated in the tool. As applications of this approach, dynamic simulations of two different gas turbine combustor designs are run, and comparisons are made with real systems. Excellent correlations have been obtained, both with respect to laboratory test (accelerometer) data, and wear patterns at various contacts and junctions on field samples.
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Liu, Shushu, Hai Huang, and Tong Qiu. "Laboratory Development and Testing of “SmartRock” for Railroad Ballast Using Discrete Element Modeling." In 2015 Joint Rail Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/jrc2015-5694.

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Ballast aggregate settlement is generally a result of consolidation or rearrangment of ballast particles in the area underneath crossties. Excessive settlement negatively impacts track performance, resulting in increased risk of train derailment. The purpose of this paper is to compare two methods to evaluate ballast aggregate settlement with repeated loading in railroad: discrete element modeling and laboratory tests using “SmartRock”. In this study, ballast aggregates are considered as uniformly graded, angular shaped with crushed faces. For the discrete element modeling, digital imaging techniques are utilized to create the ballast aggregates. Aggregate settlement in railroad ballast and the effect of aggregate shape on the dynamic response of ballast are evaluated through the discrete element simulations. A wireless device, “SmartRock” is developed to study the relationship between individual ballast particle behavior and overall ballast performance. It has a shell of a typical ballast particle shape with force cells attached on the surface and embedded with a tri-axial gyroscope, a tri-axial accelerometer, and a tri-axial magnetometer. The device can move under train traffic like a real ballast particle and record inter-particle contact forces and particle motion in real time. For the laboratory tests, a model-scale track section is constructed and subjected to repeated loading similar to train traffic. The developed “SmartRock” are embedded below rail seats and in the track shoulders. The laboratory data using “SmartRock” can be compared with results from the discrete element modeling in the future. These comparisons will validate the discrete element modeling procedure as a means to analyze railroad ballast aggregate behavior and the potential of “SmartRock” in railroad applications.
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Singh, Navpreet, and Hemanta Kumar Sarma. "Successful in the Lab, Not as Effective in the Field? Uncertainties in the Field Observations of Low Salinity Water Flooding in Sandstone and Carbonate Reservoirs-A Critical Analysis." In SPE Western Regional Meeting. SPE, 2021. http://dx.doi.org/10.2118/200803-ms.

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Abstract Low salinity waterflooding has been an area of great interest for researchers for almost over three decades for its perceived "simplicity," cost-effectiveness, and the potential benefits it offers over the other enhanced oil recovery (EOR) techniques. There have been numerous laboratory studies to study the effect of injection water salinity on oil recovery, but there are only a few cases reported worldwide where low salinity water flooding (LSW) has been implemented on a field scale. In this paper, we have summarized the results of our analyses for some of those successful field cases for both sandstone and carbonate reservoirs. Most field cases of LSW worldwide are in sandstone reservoirs. Although there have been a lot of experimental studies on the effect of water salinity on recovery in carbonate reservoirs, only a few cases of field-scale implementation have been reported for the LSW in carbonate reservoirs. The incremental improvement expected from the LSW depends on various factors like the brine composition (injection and formation water), oil composition, pressure, temperature, and rock mineralogy. Therefore, all these factors should be considered, together with some specially designed fit-for-purpose experimental studies need to be performed before implementing the LSW on a field scale. The evidence of the positive effect of LSW at the field scale has mostly been observed from near well-bore well tests and inter-well tests. However, there are a few cases such Powder River Basin in the USA and Bastrykskoye field in Russia, where the operators had unintentionally injected less saline water in the past and were pleasantly surprised when the analyses of the historical data seemed to attribute the enhanced oil recovery due to the lower salinity of the injected water. We have critically analyzed all the major field cases of LSW. Our paper highlights some of the key factors that worked well in the field, which showed a positive impact of LSW and a comparative assessment of the incremental recovery realized from the reservoir visa-a-vis the expectations generated from the laboratory-based experimental studies. It is envisaged that such a comparison could be more meaningful and reliable. Also, it identifies the likely uncertainties (and their sources) associated during the field implementation of LSW.
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Reports on the topic "Inter-laboratory test comparison"

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Grenier, M., T. Pang, and K. Butler. Inter-laboratory comparison tests for x-ray diffraction on-filter silica analysis - February 1992. Natural Resources Canada/CMSS/Information Management, 1992. http://dx.doi.org/10.4095/328856.

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