Publications Scientifiques
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Item Real-Time prediction of plastic viscosity and apparent viscosity for Oil-Based drilling fluids using a committee machine with intelligent systems(Springer, 2022) Youcefi, Mohamed Riad; Hadjadj, Ahmed; Bentriou, Abdelak; Boukredera, Farouk Saidhe prediction of drilling mud rheological properties is a crucial topic with significant importance in analyzing frictional pressure loss and modeling the hole cleaning. Based on Marsh viscosity, mud density, and solid percent, this paper implements a committee machine intelligent system (CMIS) to predict apparent viscosity (AV) and plastic viscosity (PV) of oil-based mud. The established CMIS combines radial basis function neural network (RBFNN) and multilayer perceptron (MLP) via a quadratic model. Levenberg–Marquardt algorithm was applied to optimize the MLP, while differential evolution, genetic algorithm, artificial bee colony, and particle swarm optimization were used to optimize the RBFNN. A databank of 440 and 486 data points for AV and PV, respectively, gathered from various Algerian fields was considered to build the proposed models. Statistical and graphical assessment criteria were employed for investigating the performance of the proposed CMIS. The obtained results reveal that the developed CMIS models exhibit high performance in predicting AV and PV, with an overall average absolute relative deviation (AARD %) of 2.5485 and 4.1009 for AV and PV, respectively, and a coefficient of determination (R2) of 0.9806 and 0.9753 for AV and PV, respectively. A comparison of the CMIS-AV with Pitt's and Almahdawi's models demonstrates its higher prediction capability than these previously published correlationsItem Modeling and rheological characterization of sludge based drilling oil(2014) Mellak, Abderrahmane; Benyounes, KhaledWhen the drilling mud is in contact with more or less permeable walls of the well, the liquid filter part in the formation by depositing on the walls of the solid part is called the cake (silty clay film). Among the main functions of drilling fluid include keeping the walls of the well due to the hydrostatic pressure exerted by the flowing fluid. Also, the mastery of the rheological properties of the mud used is required. . The rheological characterization focus on the drilling mud used for drilling the 121/4 phase in the well AY (Hassi Messaoud) is an invert emulsion mud with oil report / water 85/15 and its density is 2.04, consisting essentially of gas oil, organophilic clay, two emulsions, sodium chloride and barite. It would define the rheological model of drilling fluid used and seek the most suitable rheological model. The rheological tests were carried out using a Fann viscometer 6-speed (3, 6, 100, 200,300 and 600 rpm) to determine the rheological properties of the mud as the yield value or yield stress, the plastic viscosity and apparent viscosity. Other rheological parameters such as the consistency index (k) and the behavior index (n) of the mud were estimated. The results show that the Herschel-Bulkley model is a minimal deviation from other models (model Bingham and Ostwald de Waele or Power)Item Use of wood waste (Aleppo pine) as a superplasticiser in self-compacting mortars(2014) Daoui, Abdelhakim; Safi, Brahim; Rezak, M.; Zerizer, A.Item Comparative study of biopolymers action on physico-chemical and rheological properties of water-based drilling muds(Chemical Publishing, 2014) Bentriou, Abdelhak; Fourar, Karim; Benmounah, Abdelbaki; Safi, BrahimItem Rheology and zeta potential of cement pastes containing calcined silt and ground granulated blast-furnace slag(2011) Safi, Brahim; Benmounah, A.; Saidi, M.This study aimed to analyse the re-use of dam silt as a supplementary binder for self-compacting concrete (SCC). When burnt, silt becomes more reactive because the kaolin it contains is converted into metakaolin. Portland cement, calcined or burnt silt and ground granulated blast furnace slag were used in this research. Cement pastes were prepared with blends containing two or three of these materials. The replacement ratio for burnt silt in both cases was 10% and 20% by cement weight and the ratio for the slag was a constant 30% by weight of the blend. Rheological and zeta potential tests were conducted to evaluate paste electrokinetics and rheological behaviour. The findings showed that burnt silt is apt for use as an addition to cement for SCC manufactureItem Effects of alkaline and alkaline-earth ions on the rheological behavior and zetametric study of two cement pastes (artificial cement portland-CEMI and cement resistant to the sulfates-CRS) with the polynaphthalene sulfonate (PNS)(2012) Kheribet, R.; Samar, M.; Benmounah, A.; Safi, Brahim; Said, M.The use of admixtures which tends to be generalized in the formulation of self-compacting concrete (SCC), requires taking into account the chemical co mposition of cement, particularly its content of SO 3 , which can inhibit or restrain the effect of these a dmixtures (superplasticizers). For more information of the compatibility problem of cement-superplasticize r, the rheological tests with a rheometer-AR2000 and measurements of zeta potential with a Zêtasiser -2000 were used in this study. In order to understand this phenomenon due to the presence of S O 3 in cement, we propose to evaluate the action of alkaline and alkaline-earth ions, incorporating different types of additions (K + , Na + , and Ca 2+ ) to the cement pastes. To achieve this, our work will conce rn the study of rheological properties and physical characteristics of the pastes obtained using two ty pes of cement (C1: Cement Resistant to the Sulfates (CRS) and C2: CEMI). This experiment will focus on two reports: Water/Cement ( W/C) = 0.30 for which the polynaphthalene sulfonate (PNS) is used as supe rplasticizer and W/C = 0.50 (without superplasticizer). The results show that the presen ce of sulfate leads to different rheological behavi ors which are function of sulfates and the cements used