Evaluation of the settling behavior of hematite in an olefin-based drilling fluid using gamma-ray attenuation technique

Santos, Nara Brandão Costa; Fagundes, Flávia Marques; Faim, J. G. P.; Sá, L.F.R.; Souza, Elessandre Alves de; Damasceno, João Jorge Ribeiro; Arouca, Fábio de Oliveira

doi:10.1016/j.petrol.2020.107281

Cited by 5 publications

(1 citation statement)

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“…The degree of pollution caused by these drilling solids depends largely on their content, particle size, and type [ 11 ]. Up to now, although there are some literature investigating the different drilling fluids’ basis, composition, and the LGSs, where most of them primarily focus on the solid-control equipment and its efficiency, rather than the impact of LGSs on the rheological properties, filtration, and emulsion stability of drilling fluids [ 12 , 13 , 14 ]. Derrick et al [ 15 ] investigated the effect of drilled solids on the drilling rate and drilling performance.…”

Section: Introductionmentioning

confidence: 99%

Effect of Low Gravity Solids on Weak Gel Structure and the Performance of Oil-Based Drilling Fluids

Shen,

Sun,

et al. 2023

Gels

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Drilling cuttings from the rock formation generated during the drilling process are generally smashed to fine particles through hydraulic cutting and grinding using a drilling tool, and then are mixed with the drilling fluid during circulation. However, some of these particles are too small and light to be effectively removed from the drilling fluid via solids-control equipment. These small and light solids are referred to as low gravity solids (LGSs). This work aimed to investigate the effect of LGSs on the performance of oil-based drilling fluid (OBDF), such as the rheological properties, high-temperature and high-pressure filtration loss, emulsion stability, and filter cake quality. The results show that when the content of LGSs reached or even exceeded the solid capacity limit of the OBDF, the rheological parameters including the plastic viscosity, gel strength, and thixotropy of OBDF increased significantly. Furthermore, the filtration of OBDF increases, the filter cake becomes thicker, the friction resistance becomes larger, and the stability of emulsion of OBDF also decreases significantly when the concentration of LGSs reached the solid capacity limit of OBDF (6–9 wt% commonly). It was also found that LGSs with a smaller particle size had a more pronounced negative impact on the drilling fluid performance. This work provides guidance for understanding the impact mechanism of LGSs on drilling fluid performance and regulating the performance of OBDF.

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