Effect of particle size of wheat on the rheological and filtration properties of the drilling fluid

Dlovan YASEEN ABBAS

Bachelor's thesis

Annotation Declaration Introduction Background and literature review Materials and methodology Results and discussion Conclusion and recommendation References

Effect of particle size of wheat on the rheological and filtration behavior of the drilling fluid

Abstract:

Drilling fluid is a crucial part of the rotary drilling operation due to its functions in carrying rock cuttings to the surface and preventing formation fluids to enter the wellbore. Conventionally, several chemicals and nanomaterials were applied to optimize the related properties of the drilling fluids. This study focuses on formulating nano-biodegradable drilling fluids from wheat powder at different concentrations (0.5, 1 and 2 wt.%) and particle sizes (nano-size, 75, 150, 300 and 600 m). The nano-biopolymer of wheat was prepared using ball milling technique and characterized using SEM, FTIR, DLS, TGA and DSC. The impact of the wheat was investigated conducting several experimental tests of rheological and filtration measurements under different temperature conditions of 25, 50 and 70 °C. The obtained results showed that wheat powder at all different sizes has an impact on the rheological properties including plastic viscosity, yield point and gel strength. These properties are increased with increasing the size and concentration of the wheat particles. This effect is more dominant with higher temperature, such as 50 and 70 °C. In addition, the used biodegradable additive enabled to reduce the thickness of the filter cake by 50% from 5 to 2.5 mm using 75 and 150 m sizes and 2 wt.% concentrations. The filtration rate of the drilling fluid is also highly reduced from 19.5 to 11.5 cm3 under the influence of wheat at 150 m size and 2 wt.% concentration.

Abstract:

Drilling fluid is an important part of rotary drilling due to its ability to divert rock chips to the surface, preventing forming fluids from entering the borehole. Typically, some chemicals and nanomaterials were used to optimize the associated properties of drilling fluids. This study focuses on the formulation of nanobiodegradable drilling fluids from wheat powder in various concentrations (0.5, 1 and 2% by weight) and particle sizes (nano-size 75, 150, 300 and 600 mm). The wheat nanobiopolymer was prepared using spherical milling techniques and characterized using SEM, FTIR, DLS, TGA and DSC. The effect of wheat was investigated by performing several experimental tests of rheological and filtration measurements under different temperature conditions of 25, 50 and 70 °C. The results obtained showed that wheat powder of all different sizes has an effect on rheological properties including plastic viscosity, yield strength and gel strength. These properties increase with increasing size and concentration of wheat particles. This effect is more dominant at higher temperatures, e.g. 50 and 70 °C. In addition, the biodegradable additive used made it possible to reduce the thickness of the filter cake by 50% from 5 to 2.5 mm using sizes of 75 and 150 mm and a concentration of 2% by weight. Due to wheat at a size of 150 mm and a concentration of 2 % by weight. the filtration rate of drilling fluid was also significantly reduced from 19.5 to 11.5 cm3.

Keywords

Filter cake, Fluid loss, Rheological properties, Wheat, Drilling fluid.

Language used: English

Date on which the thesis was submitted / produced: 26. 7. 2023

Thesis defence

• Supervisor: Ali Jagar, M.Sc., Ph.D.

Palacký University Olomouc

Faculty of Science

Bachelor programme / field:
Petroleum Engineering / Petroleum Engineering