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• W4231520862 abstract "High Performance Emulsifiers for Synthetic Based Muds Nigel Evans; Nigel Evans Rhodia HPCII Search for other works by this author on: This Site Google Scholar Bruno Langlois; Bruno Langlois Rhodia HPCII Search for other works by this author on: This Site Google Scholar Annie Audibert-Hayet; Annie Audibert-Hayet Institut Français du Petrole Search for other works by this author on: This Site Google Scholar Christine Dalmazzone; Christine Dalmazzone Institut Français du Petrole Search for other works by this author on: This Site Google Scholar Eric Deballe Eric Deballe Institut Français du Petrole Search for other works by this author on: This Site Google Scholar Paper presented at the SPE Annual Technical Conference and Exhibition, Dallas, Texas, October 2000. Paper Number: SPE-63101-MS https://doi.org/10.2118/63101-MS Published: October 01 2000 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Evans, Nigel, Langlois, Bruno, Audibert-Hayet, Annie, Dalmazzone, Christine, and Eric Deballe. High Performance Emulsifiers for Synthetic Based Muds. Paper presented at the SPE Annual Technical Conference and Exhibition, Dallas, Texas, October 2000. doi: https://doi.org/10.2118/63101-MS Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll ProceedingsSociety of Petroleum Engineers (SPE)SPE Annual Technical Conference and Exhibition Search Advanced Search AbstractUntil now, the selection of appropriate emulsifiers for non-polluting mud formulations has been largely empirical. This is mainly due to the lack of methods that sufficiently characterise the thermal stability of concentrated water-in-oil emulsions and, by extension, complete Synthetic Based Mud (SBM) formulations.There is an increasing need in the industry to improve emulsifier performance, not only in application but also from the environmental point of view. The chemical manufacturers have responded to these challenges by the development of new chemistry and processes based on renewable natural resources that give high purity products with excellent HPHT performance and improved environmental results.Based on techniques of Differential Scanning Calorimetry (DSC), a novel methodology has been developed to enable the characterisation of water-in-oil emulsions. This non-perturbing method permits the in-depth study of complete mud formulations. The results obtained correlate well with those observed in standardised rheological and filtration tests.The performance of the new range of products determined by standard methods (API 13B: rheology, filtration, ageing) has been shown to be superior to conventional emulsifying systems. The application of the new methodology has advanced the level of understanding of the role of the emulsifier in SBM formulations.IntroductionTypical oil-based muds are essentially water-in-oil emulsions with an aqueous dispersed phase varying from 5 to 40 per cent. They contain emulsifiers for improving stability, organophilic clays for controlling rheological properties (essentially pseudoplasticity) and weighing agents (barite or haematite) for adjusting density. Up to now, the selection of appropriate emulsifiers for non-polluting mud formulations has been largely empirical. There is, in fact, a lack of methods to characterise precisely the thermal stability of concentrated water-in-oil emulsions containing solids, and better understand the relation between chemical structures of additives and drilling fluid performance. The Institut Français du Pétrole has developed a methodology for the assessment of the thermal stability of oil-based muds. Various techniques were used on full mud formulations and on corresponding primary water-in-oil emulsions : visual observation through a sapphire cell at high temperatures and under pressure, back-scattering and transmission studies with a vertical scanner and Differential Scanning Calorimetry (DSC). Compared with commonly used methods, these techniques allow better quantification of the mud stability and an assessment of the rôle of solids and emulsifiers on the thermal behaviour of oil-based muds. This specific methodology was implemented here particularly to develop and select new additives required for HP/HT applications.State of the Art [1,2]The main characteristics of oil-based muds (OBM), i.e. high lubricity, low fluid loss, stability in adverse conditions and thin filter-cake, make them particularly suitable for HP/HT wells and reservoir drilling. Nonetheless, as HP/HT conditions become more severe, problems of fluid stability start to occur : in particular,Loss of emulsion stabilityLoss of rheology controlIncreased fluid loss leading to reservoir damage. Keywords: emulsion, drilling fluids and materials, thermogramme, spe 63101, oil-based mud, drilling fluid selection and formulation, sedimentation, dalmazzone, high performance emulsifier, characterisation Subjects: Drilling Fluids and Materials, Drilling fluid selection and formulation (chemistry, properties) This content is only available via PDF. 2000. Society of Petroleum Engineers You can access this article if you purchase or spend a download." @default.
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• W4231520862 title "High Performance Emulsifiers for Synthetic Based Muds" @default.
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