Investigation on horizontal and deviated wellbore cleanout by hole cleaning device using <scp>CFD</scp> approach

Yan, Tie; Qu, Jingyu; Sun, Xiaofeng; Li, Zijian; Li, Wenyuan

doi:10.1002/ese3.346

Cited by 12 publications

(4 citation statements)

References 35 publications

(58 reference statements)

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“…This challenge is typically more pronounced when drilling low permeability and tight formations 8 and even more for horizontal wellbores. 9 , 10 …”

Section: Introductionmentioning

confidence: 99%

“…One of the major aspects is formation damage (especially in open-hole completions), which refers to the reduction in the natural ability of a reservoir to produce fluids due to a reduction in porosity, permeability, or both. This challenge is typically more pronounced when drilling low permeability and tight formations and even more for horizontal wellbores. , …”

Section: Introductionmentioning

confidence: 99%

“…This challenge is typically more pronounced when drilling low permeability and tight formations 8 and even more for horizontal wellbores. 9,10 In particular, drilling fluids with improper particle size distribution result in the plugging of the formation pores. This is due to the invasion of filtrates and/or fines into the pores.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Development of Hybrid Drilling Fluid and Enzyme–Acid Precursor-Based Clean-Up Fluid for Wells Drilled with Calcium Carbonate-Based Drilling Fluids

et al. 2020

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Significant formation damage can occur during drilling operations because of the invasion of drilling fluid fines and filtrates that lead to pore blocking and saturation alteration mechanisms. This study demonstrates the ways to minimize drilling fluid-related damage and the removal of the deposited filter cake in the carbonate reservoir through judicious selection of bridging particles using “ideal packing theory” and formulation of an enzyme-based clean-up fluid with an acid precursor. The polymer-based drill-in-fluid with a mixed grade of CaCO 3 bridging particles resulted in a compact filter cake with reduced filtration loss preventing internal pore damage significantly. Several ester hydrolysis reaction kinetics were studied, and finally, one combination was chosen as the suitable acid precursor because of its ability to generate a required concentration of acid within the downhole condition. The return permeability of mud-damaged carbonate core plugs was higher than 95% after exposure to the clean-up solution. The corrosion rates were found to be significantly below the industry limits, and the use of acid corrosion inhibitors is eliminated.

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“…This challenge is typically more pronounced when drilling low permeability and tight formations 8 and even more for horizontal wellbores. 9 , 10 …”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Development of Hybrid Drilling Fluid and Enzyme–Acid Precursor-Based Clean-Up Fluid for Wells Drilled with Calcium Carbonate-Based Drilling Fluids

et al. 2020

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“…It can model actual work conditions in fully three‐dimensional (3D) models without creating extensively simplified assumptions. Yan et al studied the effects of the helical angle and rotational speed of the blade of a hole‐cleaning device on the swirl strength of a decaying swirl flow using CFD modeling techniques. Wang et al adopted the CFD modeling approach to study the working principle of a good washing device and its parameter optimization in practical applications.…”

Section: Introductionmentioning

confidence: 99%

Rheological analysis of Newtonian and non‐Newtonian fluids using Marsh funnel: Experimental study and computational fluid dynamics modeling

Zheng

Huang

2020

Energy Science & Engineering

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In the drilling industry, Marsh funnel viscosity is only a dynamic viscosity and cannot characterize actual rheology. Thus, measuring rheology using a Marsh funnel has been drawing considerable attention. In this study, we develop simplified mathematical models for wall shear rate, wall shear stress, and their consistency plots. Moreover, we propose mathematical models for the rheological parameters of Newtonian and non‐Newtonian fluids. We compare the results of the present model with those of a ZNN‐6 viscometer, a computational fluid dynamics (CFD) model, and other analytical models. According to the quantitative analysis results, the average systematic error of the Newtonian, apparent, and plastic viscosities between the present model and the ZNN‐6 viscometer measurements is 1.35%, 8.18%, and 5.42%, respectively. The average systematic error of the yield stress is 21.43%, which is under the controllable scope. Meanwhile, results of the qualitative analysis reveal that the present model for the wall shear rate and stress agrees with the CFD model. Moreover, the flow field inside the Marsh funnel is axisymmetric and has a component velocity in the horizontal direction. In summary, the proposed model is accurate, concise, available for field applications, and beneficial for a successful and safe drilling operation. Furthermore, the CFD approach is a necessary complement to exploring the actual field flow inside the Marsh funnel.

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Study on pressure‐controlled sliding sleeve of jet breaking for natural gas hydrate mining based on throttle pressure drop principle

Tang

Yao

Yin

et al. 2020

Energy Science & Engineering

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In order to reduce operating cost of deep‐sea natural gas hydrate (NGH) solid‐state fluidization mining (SSFM), a device for controlling opening and closing of jet nozzles is required. It is required to meet the specifications of work process and is not affected by changes in water depth and well depth. Therefore, a design scheme of a pressure‐controlled sliding sleeve (PCSS) based on the principle of throttling pressure drop is proposed. The nozzles opening and closing process is controlled by flow rate control and is not affected by environmental pressure. Using computational fluid dynamics software, the corresponding control equations are solved by finite volume method and the pressure drop and axial force generated by different flow rates of drilling fluid flowing through different structural sliding cores are obtained. According to simulation analysis results and actual working conditions, a relatively good set of sliding core structural parameters is preferred. According to structural parameters of this group, the prototype of PCSS was machined and throttle pressure drop principle verification experiment and section pressure difference principle exclusion experiment were carried out to verify the feasibility of the design of PCSS. Through this research, it can help to promote the application of the throttling pressure drop principle in controllable oil drilling and completion tools.

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Investigation on horizontal and deviated wellbore cleanout by hole cleaning device using CFD approach

Cited by 12 publications

References 35 publications

Development of Hybrid Drilling Fluid and Enzyme–Acid Precursor-Based Clean-Up Fluid for Wells Drilled with Calcium Carbonate-Based Drilling Fluids

Development of Hybrid Drilling Fluid and Enzyme–Acid Precursor-Based Clean-Up Fluid for Wells Drilled with Calcium Carbonate-Based Drilling Fluids

Rheological analysis of Newtonian and non‐Newtonian fluids using Marsh funnel: Experimental study and computational fluid dynamics modeling

Study on pressure‐controlled sliding sleeve of jet breaking for natural gas hydrate mining based on throttle pressure drop principle

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