Obtenção e caracterização de um fluido de perfuração biodegradável a base de tensoativo não iônico NP40 e óleo de canola

Abstract

Well drilling is one of the pillars in oil exploration, or the link between a surface and a reservoir, a vital part of drilling is the fluid used and must be efficient in the process. The objective of the work is to develop a basic microemulsive fluid applicable to the drilling of oil wells, which can be biodegradable and of low cost. From the construction of ternary phase diagrams, it was possible to investigate and use a microemulsion point formed by three components, an oil phase, an aqueous phase and a surfactant that a fluid base was used, which was then added to aggregate desirable resources for drilling. Fann 35 A viscosity measurements were used, it was used to measure the apparent and plastic viscosity, the outflow limit, the initial and the final gel measurements of the drilling, in addition, from these readings, it was possible to study the behavior of the fluid and determine which classification and model will best fit this behavior based on API 13B (2012), the density was measured on the mud balance Fann 140, the filter test on the pressurized API Filter Press. The fluids obtained have a homogeneous appearance with specific masses of 1.14 and 1.19 g / cm³, the volume of filtrate was obtained after a period of 30 min at a pressure of 100 psi was only 6.4 mL for a fluid and 12 , 6 for the other, using 1.00 g of filtrate reducer, the fluids have an apparent viscosity of 115 and 136.8 cP and the plastic viscosity of 104.5 and 125 cP, an outflow limit of 21 and 23.5 N / m², from the consistency curve obtained through the graph plotted between the Shear Stress (τ) in N / m² and the strain rate (γ) in 1 / s, the parameters were obtained and adjustment to a Herschel-Bulkley rheological model, which is a threeparameter model, being a power fluid with an initial outflow limit, the fluid is nonNewtonian, non-linear and has an initial shear stress. A compatibility test was carried out with a cement paste to study the contamination, the compatibility was satisfactory. In order to simulate oil well conditions, an HPHT rheology and an aging test verified the rheological consistency, presenting generally satisfactory results and within the reference values.