Sedimentation of solids in drilling fluids used in oil well drilling operations

Santos, Nara Brandão Costa; Fagundes, Flávia Marques; Arouca, Fábio de Oliveira; Damasceno, João Jorge Ribeiro

doi:10.1016/j.petrol.2017.12.026

Cited by 28 publications

(17 citation statements)

References 12 publications

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“…As the suspension showed shear-thinning and thixotropic behavior, as the time goes on the polymers structures presented in the fluid had become gelified, which increased the polymeric arrangement of sediment column structure to be passed through by solids and form the sediment. The same was verified in another study with drilling fluids [24].…”

Section: Analysis Of Volumetric Solids Concentration Profilesupporting

confidence: 72%

“…In this context, the deformation caused by shear rate sedimentation was very low and the agglomeration phenomenon also from solid particles sedimentation in the sediment structure was not observed. So, although the suspension had non-Newtonian nature, the sediment profile present Newtonian characteristics, and the velocity of sedimentation was guide by fluid flow upward against gravitational solid deposition to the bottom tube [14,24].…”

Section: Analysis Of Volumetric Solids Concentration Profilementioning

confidence: 99%

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Study on the stability of a shear-thinning suspension used in oil well drilling

Fagundes

Santos

Damasceno

et al. 2018

Oil & Gas Science and Technology - Rev. IFP Energies nouvel

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In order to avoid solid-liquid gravitational separation of particles in the drilling fluid and cuttings generated in this process, the oil industry has been developing drilling fluids with shear-thinning and thixotropic characteristics. In case of operational stops in the drilling process, the intense sedimentation of these particles can damage the equipment used and the well. In this context, this study simulated an operational stop to obtain information about stability of solids in a paraffin-based suspension with time-dependent shear-thinning behavior, which has already been used in current drilling processes. A long-term test using gamma-ray attenuation technique identified the separation dynamics of a set of micrometric particles belonging to and incorporated into the drilling fluid during operation. This test verified the typical regions of gravitational sedimentation and, through constant concentration curves, indicated that the sedimentation process did not occur at a constant rate. This study also proposed a constitutive equation for pressure on solids.

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Section: Analysis Of Volumetric Solids Concentration Profilesupporting

confidence: 72%

Section: Analysis Of Volumetric Solids Concentration Profilementioning

confidence: 99%

Study on the stability of a shear-thinning suspension used in oil well drilling

Fagundes

Santos

Damasceno

et al. 2018

Oil & Gas Science and Technology - Rev. IFP Energies nouvel

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“…Data was prepared for analysis to investigate (1) the relationship between drilled solid and mud rheology such as density, plastic viscosity (PV), yield point (YP), gel strength-10 seconds (GS-10s), gel strength-10 minutes (GS-10m), gel strength-30 minutes (GS-30m) and (2) their rheological model property [11]. A boxplot graph was initiated to test for any data outliers.…”

Section: Data Preparationmentioning

confidence: 99%

“…Drilling fluid or drilling mud is characterized as shear-thinning and time dependent fluid whereby it can promote the transportation of cuttings to the surface during drilling and remain suspended when the circulation stops. Suitable rheology of the drilling fluid is important to avoid solid sedimentation during stops and prevent damages such as stuck pipe, loss of circulation, high overpull margin, drill bit jamming and increase in bit torque when the system restart operation [1,2]. The cuttings generated during drilling are dispersed in the mud.…”

Section: Introductionmentioning

confidence: 99%

Statistical Relationship of Drilled Solid Concentration on Drilling Mud Rheology

Sauki¹,

Khamaruddin²,

Irawan³

et al. 2020

ARFMTS

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Drilled solid is a continuous contaminant in drilling mud during drilling operation. The purpose of this study is to evaluate the statistical correlation of drilled solid concentration on mud rheology. A Spearman's correlation was used to determine the relationship between 31 mud rheology data and the drilled solid concentration data from North Kuwait Field. Four rheological models were used to compare the rheological behaviour of the drilled solid-laden drilling fluid which were Bingham Plastic, Power Law, Herschel-Bulkley and Robertson-Stiff Model. Results showed that a positive monotonic relationship was observed between all drilled solid concentration and mud rheology parameters. An excessive relationship was observed between drilled solid concentration and mud density with a Spearman coefficient (ρ) of 0.942. Other mud rheology parameters such as plastic viscosity, yield point and gel strength show a significant (high) relationship with a spearman coefficient (ρ) in between 0.833 and 0.704. Flow curves of the drilled solid-laden drilling fluids used in this study can be well depicted by the Herschel-Bulkley and Robertson-Stiff Model. These results are not only support the justifiable attention given to address drilled solid impact to the mud rheology, but they also proposed a statistically approach in preparing data for analysis.

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“…• Increase drilling penetration rate it improves the mobility of drilling fluid in the formation which leads to increasing the penetration rate (Salas et al 2015;Santos et al 2018;Yan et al 2018;Weems et al 2016;Yihdego 2017;Zhang et al 2018). …”

Section: Introductionmentioning

confidence: 99%

A visual investigation of different pollutants on the rheological properties of sodium/potassium formate fluids

Davarpanah

2018

Appl Water Sci

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Nowadays, the adverse effect of drilling operation performances on the environment is considered as one of the major concern of petroleum industries which should be taken into the consideration to virtually eliminate the unnecessary expenses of improving the wasting quality before entering to the environment. Volume and toxicity of discharged materials evaluate surface discharge severity. The ubiquitous utilization of formate fluids has revolutionized the way petroleum industries have conquered the lower drilling inefficiencies. We investigated the profound impact of different pollutants on the potassium/ sodium formate fluids using experimental tests. The particular sample for mud pollution test was formate fluid with starch biopolymers. To do this, five samples of formate fluids were made, and each of them was polluted by several pollutants such as cement, lime, acid, alkali and stucco. Consequently, rheological properties and the pH changes and their effect on the formate fluids were evaluated.

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Sedimentation of solids in drilling fluids used in oil well drilling operations

Cited by 28 publications

References 12 publications

Study on the stability of a shear-thinning suspension used in oil well drilling

Study on the stability of a shear-thinning suspension used in oil well drilling

Statistical Relationship of Drilled Solid Concentration on Drilling Mud Rheology

A visual investigation of different pollutants on the rheological properties of sodium/potassium formate fluids

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