REOLOGY AND TIXOTROPY OF DISPERSION OF NEW BENTONITIC CLAY OCCURRENCES OF THE PARAÍBA STATE, BRAZIL, FOR USE IN ORGANIC DRILLING FLUIDS

Reference	Presenter	Authors (Institution)	Abstract
16-013	Isabelle Albuquerque Silva	Silva, I.A.(Universidade Federal de Campina Grande); Silva, D.S.(Universidade Federal de Campina Grande); Pereira, I.D.(Universidade Federal de Campina Grande); Sousa, F.K.(Universidade Federal de Campina Grande); Neves, G.A.(Universidade Federal de Campina Grande); Ferreira, H.C.(Universidade Federal de Campina Grande);	New deposits of bentonite clays were found in the state of Paraíba, Brazil, bringing new choices since the best occurrences of the state are increasingly depleted. Thus, this work aims to make a rheological and thixotropic study of dispersions of new occurrences of bentonite clays in the state of Paraíba, Brazil, in the use in organic drilling fluids. The characterization of the samples was carried out through X-ray diffraction, X-ray fluorescence, particle size analysis, differential thermal analysis, thermogravimetric analysis, cation exchange capacity and specific area. After this, the samples were organophilized with quaternary ammonium salt and again characterized. A rheological and thixotropic study of the samples was carried out based on the Petrobras standard EP-1EP-00023-A, 2011, also evaluating the swelling of the dispersions and flow curves. Results show that one of the samples under study presented satisfactory rheological and thixotropic properties for use in organic drilling fluids.
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