Influence of Polymer Reagents in the Drilling Fluids on the Efficiency of Deviated and Horizontal Wells Drilling

Tianle Liu, Ekaterina Leusheva, Valentin Morenov, Lixia Li, Guosheng Jiang, Changliang Fang, Ling Zhang, Shaojun Zheng and Yinfei Yu
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Tianle Liu: Faculty of Engineering, China University of Geosciences, Wuhan 430074, China
Ekaterina Leusheva: Department of Oil and Gas, Saint Petersburg Mining University, 199106 Saint Petersburg, Russia
Valentin Morenov: Department of Oil and Gas, Saint Petersburg Mining University, 199106 Saint Petersburg, Russia
Lixia Li: Faculty of Engineering, China University of Geosciences, Wuhan 430074, China
Guosheng Jiang: Faculty of Engineering, China University of Geosciences, Wuhan 430074, China
Changliang Fang: Faculty of Engineering, China University of Geosciences, Wuhan 430074, China
Ling Zhang: Faculty of Engineering, China University of Geosciences, Wuhan 430074, China
Shaojun Zheng: Faculty of Engineering, China University of Geosciences, Wuhan 430074, China
Yinfei Yu: Faculty of Engineering, China University of Geosciences, Wuhan 430074, China

Energies, 2020, vol. 13, issue 18, 1-16

Abstract: Improving the efficiency of well drilling process in a reservoir is directly related to subsequent well flow rates. Drilling of deviated and horizontal wells is often accompanied by an increase in pressure losses due to flow resistance caused by small size of the annular space. An important role in such conditions is played by the quality of borehole cleaning and transport capacity of drilling fluid, which is directly related to the rheological parameters of the drilling fluid. The main viscosifiers in modern drilling fluids are polymer reagents. They can be of various origin and structure, which determines their features. This work presents investigations that assess the effect of various polymers on the rheological parameters of drilling fluids. Obtained data are evaluated taking into account the main rheological models of fluid flow. However, process of fluid motion during drilling cannot be described by only one flow model. Paper shows experimentally obtained data of such indicators as plastic viscosity, dynamic shear stress, non-linearity index and consistency coefficient. Study has shown that high molecular weight polymer reagents (e.g., xanthan gum) can give drilling fluid more pronounced pseudoplastic properties, and combining them with a linear high molecular weight polymer (e.g., polyacrylamide) can reduce the value of the dynamic shear stress. Results of the work show the necessity of using combinations of different types of polymer reagents, which can lead to a synergetic effect. In addition to assessing the effect of various polymer reagents, the paper presents study on the development of a drilling fluid composition for specific conditions of an oil field.

Keywords: polymer reagents; drilling mud; rheology; plastic viscosity; dynamic shear stress; equivalent circulation density (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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