scholarly journals Desempenho reológico e de filtração de fluidos de perfuração base óleo preparados com argilas bentoníticas provenientes do município de Boa Vista-PB

2020 ◽  
Vol 1 (51) ◽  
pp. 22
Author(s):  
Carlos Magno Rocha Almeida Souto ◽  
Danielly Vieira Lucena ◽  
Clarice Oliveira Da Rocha ◽  
Maria Eduarda Da Silva Barbosa ◽  
Syane Marcelle Miranda
Keyword(s):  
Rheological Properties ◽  
Bentonite Clay ◽  
Oil Industry ◽  
Drilling Fluids ◽  
Specific Chemical ◽  
Physico Chemical ◽  
Three Samples ◽  
Essential Input ◽  
Bentonite Clays ◽  
Main Consumer

<div class="page" title="Page 1"><div class="layoutArea"><div class="column"><p>Bentonite clays are an essential input to the production of drilling fluids. One of the main consumer segments of bentonite clay is the oil industry, where it is used as a thixotropic agent in drilling fluids in oil wells, attributing to the fluids physical characteristics and specific chemical and rheological properties. According to Leal (2012), the physico-chemical and rheological properties must be carefully controlled so that the fluid can perform all its functions, such as cooling the drill, forming a layer of low permeability with the formation and keeping the solids in suspension, in order to ensure its good performance in drilling wells. Three samples of industrialized sodium bentonite clays from the Boa Vista-PB region were studied. For the organophilization of the clays will be used quaternary ammonium salt, the rheology was determined, and it was observed that it is possible to obtain formulations of oil-based fluid additives with clay.</p></div></div></div>

scholarly journals Studies of new occurrences of bentonite clays in the State of Paraíba for use in water based drilling fluids

2013 ◽  
Vol 66 (4) ◽  
pp. 485-491 ◽  
Author(s):  
Isabelle A. Silva ◽  
Julliana Marques R. Costa ◽  
Romualdo R. Menezes ◽  
Heber S. Ferreira ◽  
Gelmires de A. Neves ◽  
...  
Keyword(s):  
Bentonite Clay ◽  
Particle Size Analysis ◽  
The State ◽  
Size Analysis ◽  
Drilling Fluids ◽  
X Ray ◽  
Clay Deposits ◽  
Water Based ◽  
Bentonite Clays ◽  
New Occurrences

New bentonite clay deposits have recently been discovered in the state of Paraíba, mainly in the municipalities of Cubati and Pedra Lavrada, creating great expectations in view of the possibility of expanding industrial production using these new reserves. The aim of this study was to study the new occurrences of bentonite clay in Paraíba, particularly in the municipality of Pedra Lavrada, for use in water based drilling fluids. The mineralogical properties of the clays were characterized by particle size analysis using laser diffraction, and thermogravimetric and differential thermal analysis, and its chemical composition was analyzed by X-ray fluorescence, X-ray diffraction, cation exchange capacity and specific surface area. The bentonite clays were treated with sodium carbonate at concentrations of 75, 100, 125, 150 and 175mEq/100g of dry clay, to transform them from polycationic to sodium form. For the technological characterization, drilling fluids were prepared according to the standards of Petrobras. The results indicated that the mineralogical composition of the samples consisted of montmorillonite, kaolinite and quartz. As for their rheological properties, the samples were found to partially meet the rheological requirements of the Petrobras standard.

scholarly journals Influence of Ca2+ in the rheological properties and filtration of bentonitic clay dispersions in aqueous drilling fluids

Cerâmica ◽  
2019 ◽  
Vol 65 (374) ◽  
pp. 216-221
Author(s):  
I. A. Silva ◽  
D. S. Silva ◽  
B. M. A. B. Buriti ◽  
R. R. Menezes ◽  
G. A. Neves ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Physicochemical Characteristics ◽  
Drilling Fluids ◽  
Exchangeable Cation ◽  
Bentonitic Clay ◽  
Layer Effect ◽  
Bentonite Clays ◽  
Filtration Properties ◽  
New Occurrences ◽  
Structural Layer

Abstract The physicochemical characteristics of cations may be able to modify the rheological properties of bentonite clays, such as their loads, exchangeable cation sizes adsorbed on clay minerals, hydration behaviors and different intercalations with the bentonite structural layer effect of the cations present on the rheology of dispersions of bentonite clays. In this way, the objective was to study the influence of Ca2+ on the rheological and filtration properties of dispersions of new occurrences of bentonite clays from the State of Paraíba, Brazil, in aqueous drilling fluids. Four bentonite clays were selected, being characterized chemically, physically and mineralogically. Sodium carbonate was then added to the clays, and the rheological and filtration behavior of their dispersions were studied. The results showed the direct influence of the Ca2+ present and its implications, resulting from physicochemical interactions, on the rheological and filtration properties of dispersions of bentonite clays.

scholarly journals Effect of carboxymethylcellulose on the rheological and filtration properties of bentonite clay samples determined by experimental planning and statistical analysis

Cerâmica ◽  
2018 ◽  
Vol 64 (370) ◽  
pp. 254-265 ◽  
Author(s):  
B. M. A. Brito ◽  
P. M. Bastos ◽  
A. J. A. Gama ◽  
J. M. Cartaxo ◽  
G. A. Neves ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Statistical Analysis ◽  
Rheological Properties ◽  
Apparent Viscosity ◽  
Bentonite Clay ◽  
Plastic Viscosity ◽  
Drilling Fluids ◽  
Experimental Planning ◽  
Water Based ◽  
Filtration Properties

Abstract Over the past few years, considerable research has been conducted using the techniques of mixture delineation and statistical modeling. Through this methodology, applications in various technological fields have been found/optimized, especially in clay technology, leading to greater efficiency and reliability. This work studied the influence of carboxymethylcellulose on the rheological and filtration properties of bentonite dispersions to be applied in water-based drilling fluids using experimental planning and statistical analysis for clay mixtures. The dispersions were prepared according to Petrobras standard EP-1EP-00011-A, which deals with the testing of water-based drilling fluid viscosifiers for oil prospecting. The clay mixtures were transformed into sodic compounds, and carboxymethylcellulose additives of high and low molar mass were added, in order to improve their rheology and filtrate volume. Experimental planning and statistical analysis were used to verify the effect. The regression models were calculated for the relation between the compositions and the following rheological properties: apparent viscosity, plastic viscosity, and filtrate volume. The significance and validity of the models were confirmed. The results showed that the 3D response surfaces of the compositions with high molecular weight carboxymethylcellulose added were the ones that most contributed to the rise in apparent viscosity and plastic viscosity, and that those with low molecular weight were the ones that most helped in the reduction of the filtrate volume. Another important observation is that the experimental planning and statistical analysis can be used as an important auxiliary tool to optimize the rheological properties and filtrate volume of bentonite clay dispersions for use in drilling fluids when carboxymethylcellulose is added.

scholarly journals Influence of MgO and CaCl2 on the rheological properties of bentonitic clays from the new Paraíba-Brazil deposits using experimental planning and statistical analysis

Cerâmica ◽  
2020 ◽  
Vol 66 (377) ◽  
pp. 74-80
Author(s):  
B. M. A. B. Buriti ◽  
M. E. B. Araújo ◽  
P. M. Bastos ◽  
J. M. Cartaxo ◽  
G. A. Neves ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Rheological Properties ◽  
Clay Minerals ◽  
Apparent Viscosity ◽  
Drilling Fluids ◽  
Chemical Additives ◽  
Experimental Planning ◽  
Water Based ◽  
Planning Technique ◽  
Bentonite Clays

Abstract New deposits of bentonite clays have been discovered in the Brazilian State of Paraíba; the most recent was at the municipality of Olivedos. Recent studies have discovered the presence of high levels of non-clay minerals that can produce unsatisfactory results when attempting to use these clays in drilling fluids. In order to make them suitable for this purpose, the MgO and CaCl2 as chemical additives were used and their influences on the rheological properties of these clays were analyzed, using an experimental planning technique and statistical analysis. The samples were obtained using experimental modeling by the delineation of mixtures technique; first, the clays were transformed with sodium carbonate and then dosed with MgO and CaCl2. The rheological properties, apparent viscosity (AV) and plastic viscosity (PV) were determined according to the Petrobras standard (AV≥15 cP; PV≥4 cP). The results showed that the values of AV and PV increased considerably and that MgO was the additive that contributed most to the improvement of these properties, making these additives suitable for use in water-based drilling fluids.

scholarly journals Influence of the additivation process on cation exchange capacity and viscosity of bentonitic clay dispersions

Cerâmica ◽  
2020 ◽  
Vol 66 (377) ◽  
pp. 81-87 ◽  
Author(s):  
I. C. G. Morais ◽  
I. A. Silva ◽  
B. M. A. B. Buriti ◽  
J. V. Fernandes ◽  
D. S. Silva ◽  
...  
Keyword(s):  
Cation Exchange ◽  
Sodium Carbonate ◽  
Cation Exchange Capacity ◽  
Solution Process ◽  
Bentonite Clay ◽  
Exchange Capacity ◽  
Drilling Fluids ◽  
Exchange Reactions ◽  
Cure Time ◽  
Bentonite Clays

Abstract In Brazil, bentonite clays are not naturally sodic and it is an industrial practice the sodium additivation, since sodium ion expands their lamellae allowing a larger amount of water to penetrate. The objective was to analyze the influences of the use of sodium carbonate on the clay during the additivation process, the moisture content and the cure time on cation exchange and viscosity of bentonite clay dispersions for water-based drilling fluids, since there is a shortage of studies on this subject. Newly discovered bentonite clays in Paraíba State, Brazil, were chemically, physically and mineralogically characterized and were additivated with sodium carbonate in aqueous solution (process 1) or in powder form (process 2). Samples with 25% to 60% of moisture (dry basis) were prepared and submitted to cure times of 7 to 45 days. Process 1, as expected, showed better results of cation exchange capacity, viscosity and filtrate volume. The ideal cure time was 15 days. After this period there was a reversal of the cation exchange reactions.

scholarly journals Karakalpakstan Bentonite Clays - Perspective Raw Materials for Obtaining Ceramic Heat-Insulating Materials

2020 ◽  
Vol 9 (8) ◽  
pp. 417-420
Keyword(s):  
Raw Materials ◽  
Bentonite Clay ◽  
Chemical Characteristics ◽  
Insulating Materials ◽  
The North ◽  
Physico Chemical ◽  
Bentonite Clays ◽  
Comprehensive Study

The article presents the results of a comprehensive study of bentonite clays of the North Jamansay deposit of Karakalpakstan for the production of ceramic heat-insulating materials. The possibility of using this bentonite clay as a result of studying their chemical and mineralogical, fractional compositions and physico-chemical characteristics for ceramic heat-insulating materials for various purposes has been established.

Development of Organoclays for Use in Oil-Based Drilling Fluids

2012 ◽  
Vol 727-728 ◽  
pp. 1557-1562 ◽  
Author(s):  
Mirtys Allamana Ferreira Cardoso ◽  
Heber Sivini Ferreira ◽  
Isabelle Albuquerque da Silva ◽  
Heber Carlos Ferreira ◽  
Gelmires Araújo Neves
Keyword(s):  
Aqueous Solution ◽  
Apparent Viscosity ◽  
Bentonite Clay ◽  
Oil Wells ◽  
Ionic Surfactants ◽  
Organic Layer ◽  
Drilling Fluids ◽  
X Ray Diffraction ◽  
X Ray ◽  
Bentonite Clays

The organoclays are derived from bentonite clays treated in aqueous solution with surfactants, which are incorporated into the interlayer surface of clays, covering them with an organic layer; so, the naturally hydrophilic clay becomes hydrophobic. This paper proposes a study to find the dispersant media (diesel, paraffin or ester) which is more suitable for use in fluids, using the bentonite clay Cloisite Na +, treated with ionic surfactants Praepagen HY and Praepagen WB. The organoclay obtained was characterized by X-ray diffraction, and we measured the apparent viscosity and plastic dispersions. We observed the importance of the type of surfactant and dispersant amid to obtain organoclays for non-aqueous drilling fluids with the dispersants that meet existing specifications for drilling oil wells.

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