Article
Engineering, Marine
Alexey Cherepovitsyn, Andrey Lebedev
Summary: The study highlights the importance of the Arctic as a potential resource for the industrial sector in the face of depleting conventional oil and gas reserves. The concept of sustainable development emphasizes the need for the circular economy in resource extraction to minimize environmental damage. This article compares two methods of drilling waste disposal and concludes that thermomechanical cleaning on site is the most effective in terms of both economy and the environment. It further evaluates the prospects and opportunities for drilling waste management in Russian offshore fields.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Energy & Fuels
Leyla Ismailova, Victoria Dochkina, Mustafa Al Ibrahim, Mokhles Mezghani
Summary: A practical automated method for estimating drill cuttings particle sizes using digital images is proposed. The method combines several well-known techniques and has been tested on images from wells with varying lithologies and particle sizes. The results show that the method is robust and provides accurate measurements comparable to manual measurements, with a fast processing speed suitable for near real-time applications.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Petroleum
Zhi Zhang, Baojiang Sun, Zhiyuan Wang, Shikun Tong, Bing Guo, Kai Du
Summary: This study considers the randomness and uncertainty of cuttings movement and establishes an evolution model for the morphological distribution of cuttings piles and the nearby flow field. The model can quantitatively analyze the evolution law of cuttings piles and the disturbance law of the flow field near the piles.
Article
Thermodynamics
Fangfei Huang, Jin Yang, Bin Li, Lunke Gan, Qizeng Feng
Summary: A dynamic analysis model is established to analyze the dynamic characteristics of the drill string in water and down hole during the process of deep-water riserless drilling. The results show that the displacement of the drill string in water increases with the ocean current velocity, water depth, rotation speed, and WOB, but the rotation speed and WOB have less influence. The drill string in down hole has a similar pattern, with only the area near the mud line and the bit being affected.
ADVANCES IN MECHANICAL ENGINEERING
(2023)
Review
Engineering, Chemical
Zhaokai Hou, Yuan Yuan, Ye Chen, Enyuan Jiang, Huaishan Wang, Xu Zhang
Summary: This study analyzes the factors affecting the settling rate of particles and summarizes the current issues and development direction in particle settling rate research. The study found that factors such as wall effect, fluid rheology, particle shape irregularity, and particle concentration can affect the settling rate of particles.
Review
Engineering, Mechanical
Yili Chen, Jun Liu, Mengqi Cai
Summary: A three-dimensional nonlinear coupling dynamics model of the drill string was established to study the vibration behavior of the drill string and its impact on wellbore pressure in deepwater riserless drilling. Factors such as heave and offset motion of the offshore platform, ocean current load, drill string-borehole contact, and bit-rock interaction were taken into account. The effectiveness of the model and calculation program was verified by field test data. The study also investigated the 3D nonlinear coupling vibration characteristic of the drill string and its influence on wellbore pressure fluctuation. The results can be useful in predicting the risks of well leakage and collapse in deepwater riserless drilling operations.
NONLINEAR DYNAMICS
(2023)
Article
Geochemistry & Geophysics
David Grant, Dylan J. Goudie, Derek Wilton
Summary: The study compares three methods of sample preparation and finds that single-step trans-vertical moulds yield more accurate and representative statistical data, while reducing preparation time and increasing analytical throughput.
Article
Environmental Sciences
Ross Jones, Mary Wakeford, Leanne Currey-Randall, Karen Miller, Hemerson Tonin
Summary: The study aimed to enhance knowledge on impact predictions near sensitive environments during drilling, emphasizing on the need to better characterize drilling fluid discharges to reduce uncertainty. High volume, concentration, and discharge rate water-based drilling mud discharges were identified as the most significant dispersal risk, but the generation of jet-like plumes limited longer-range movement.
MARINE POLLUTION BULLETIN
(2021)
Article
Thermodynamics
Boxue Pang, Xianghui Ren, Zaobao Liu, Xin Wang, Xu Liu
Summary: Effective cuttings transport in horizontal drilling has always been a challenge. This study investigates the transportation of multi-size cuttings using non-Newtonian drilling fluids in a rotating drill pipe. The study predicts the flow regime of multi-size cuttings and studies the effects of particle size composition characteristics. The results show that the concentration and velocity distributions of cuttings exhibit swaying phenomena with drill pipe rotation, and the worst borehole cleaning occurs when the concentration of injected multi-size cuttings is negatively correlated with particle size.
Article
Environmental Sciences
Andreia Silveira Freire Soares, Monica Regina da Costa Marques, Luciana da Cunha Costa
Summary: This work investigates the characterization and leaching studies of pre-salt drill cuttings from offshore oil and gas exploration in ultradeep waters. The highest concentrations of Fe, Al, and Ba were found in the drill cuttings. Non-aqueous fluids contributed to the significant contents of Ba, Al, Fe, Cu, Pb, Mn, Si, and Zn, while aqueous fluids resulted in high concentrations of Ni and Cr. The samples showed different levels of total petroleum hydrocarbons (TPHs) content, and some cutting samples were contaminated with oil. Most samples were contaminated by polycyclic aromatic hydrocarbons (PAHs). Saline and aqueous leachates contained different metals in varying concentrations.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Energy & Fuels
Na Zhu, Wenjun Huang, Deli Gao
Summary: This study investigates the wavy distribution of the cutting layer in an entire wellbore considering a dune mechanism. The improved model considers the buoyancy of cuttings motion in deviated sections and proposes an index to estimate the dynamic cleaning effect. Results demonstrate that the cuttings bed is distributed in waves during pure drilling and washing iterations, with the height decreasing with an increase in R. It is recommended that R should be greater than 0.5 and ideally between 1.2-2.5 to save extra circulations.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Pengcheng Wu, Chentao Li, Zhen Zhang, Jingwei Yang, Yanzhe Gao, Xianbing Wang, Xiumei Wan, Chengyu Xia, Qunying Guo
Summary: In order to improve the cuttings transport ability and well hole purification effect of horizontal shale gas wells in the Sichuan and Chongqing area, a new type of aluminum alloy drill pipe is proposed and validated. A simulation model is developed to compare the cleaning ability of the new aluminum alloy drill pipe and the traditional steel drill pipe. The results show that the new drill pipe can improve the borehole purification capacity by 13% on average. This research is significant in reducing cuttings quality and improving borehole purification effect.
Article
Energy & Fuels
Faling Yin, Xingyu Ni, Jindong Han, Jianwei Di, Youwei Zhou, Xinxin Zhao, Yonghai Gao
Summary: Accurate prediction of wellbore temperature and pressure is crucial for safe drilling. The study establishes a prediction model considering hydrate cuttings decomposition, interphase mass transfer, and phase transition heat to explore their effects on temperature and pressure in deep water riserless drilling. The influence of hydrate cuttings decomposition increases with higher inlet temperature and penetration rate, while it decreases with increased displacement. This study provides valuable insights for the prediction of temperature and pressure in deep water hydrate reservoir riserless drilling.
Article
Energy & Fuels
Tie Yan, Jing-Yu Qu, Xiao-Feng Sun, Wei Li, Ye Chen, Qiao-Bo Hu
Summary: This study experimentally investigated the drag coefficient and settling velocity of drill cuttings in different types of fluids, establishing predictive models that accurately predict the settling velocity in power-law and Herschel-Bulkley fluids with mean relative errors of 5.03% and 6.74%, respectively, verifying the accuracy of the models.
Review
Environmental Sciences
Yuansi Hu, Shiqi Mu, Jingjing Zhang, Qibin Li
Summary: This paper reviews the recent research progress on Oil-based drilling cuttings (OBDC), including their regional distribution, properties, treatment technologies, and resource utilization. The advantages and disadvantages of different technologies for removing petroleum pollutants from OBDC were comprehensively analyzed, and required future developments in treatment technologies were proposed.
Article
Energy & Fuels
Muhammad Awais Ashfaq Alvi, Mesfin Belayneh, Kjell Kare Fjelde, Arild Saasen, Sulalit Bandyopadhyay
Summary: Recent studies have shown the potential of hydrophobic iron oxide nanoparticles to significantly improve the performance of oil-based drilling fluids. By adding 0.5wt% iron oxide nanoparticles in hexane solution, the filtration loss in high pressure and high temperature conditions was reduced by 70%, filter cake thickness by 55%, and coefficient of friction by 39%. Additionally, the nanofluid-based drilling fluid reduced the formation of a free oil layer by 16.3% during aging at high temperature compared to the base fluid.
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME
(2021)
Article
Energy & Fuels
Mari R. Tveit, Mahmoud Khalifeh, Tor Nordam, Arild Saasen
Summary: The study compared leaking wells and natural seeps, suggesting that fate analysis is necessary to evaluate environmental implications of leaking wells. Natural gas releases dissolve mostly in the ocean, while oil fate is more complex involving mechanisms like evaporation, sedimentation, and biodegradation.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Engineering, Petroleum
Titus Ntow Ofei, Dinesh Venkata Kalaga, Bjornar Lund, Arild Saasen, Harald Linga, Sigbjorn Sangesland, Knud Richard Gyland, Masahiro Kawaji
Summary: This paper presents the results of barite sag measurements before and after hot-rolled oil-based drilling fluids using different characterization approaches. The rheological characterization showed that heat-activated chemicals in the hot-rolled fluid increased viscosity and elasticity, leading to lower barite sag and longer suspension of particles. Time-dependent oscillatory shear measurements provided new insights for predicting barite sag tendencies during the fluid design phase.
Review
Energy & Fuels
Camilo Pedrosa, Arild Saasen, Jan David Ytrehus
Summary: Over time, operator companies have been researching and applying different hole cleaning techniques to improve cutting removal efficiency. However, there are issues with low efficiency, pipe sticking, and low rate of penetration.
Review
Energy & Fuels
Hanieh K. Foroushan, Bjornar Lund, Jan David Ytrehus, Arild Saasen
Summary: Efficient fluid displacement is crucial for high-quality cementing jobs during drilling operations. Despite extensive research on mud removal, the industry still faces poor cementing jobs, highlighting the need to evaluate current theories, methodologies, and practical techniques for further improvements.
Article
Energy & Fuels
Jan David Ytrehus, Bjornar Lund, Ali Taghipour, Birgitte Ruud Kosberg, Luca Carazza, Knud Richard Gyland, Arild Saasen
Summary: This study compared the flow characteristics of an oil-based drilling fluid with micronized barite as weight material in different wellbore wall materials. It found that turbulent flow was stronger with concrete wall material, and it had a significant impact on hole cleaning and pressure loss.
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME
(2021)
Article
Energy & Fuels
Arild Saasen, Jan David Ytrehus, Bjornar Lund
Summary: The paper demonstrates the application of Herschel-Bulkley fluid model in pressure loss calculations, as well as the effectiveness of the simplified model for axial flow and turbulent flow. Experimental results indicate that measuring viscous data at relevant shear rates can improve the accuracy of pressure loss predictions.
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME
(2021)
Article
Energy & Fuels
Arild Saasen, Benny Poedjono, Geir Olav Anesbug, Nicholas Zachman
Summary: This paper discusses the impact of magnetic debris in drilling fluid on functionality and signal-to-noise ratios of downhole logging. It also highlights the challenges of directional drilling near magnetic North Pole areas and the potential improvements in efficiency through enhanced ditch magnet systems. Through a combination of strong magnets, flow directors, and proper cleaning routines, the performance of ditch magnets in removing magnetic contamination from drilling fluid can be significantly enhanced.
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME
(2021)
Article
Energy & Fuels
Titus Ntow Ofei, Bjornar Lund, Arild Saasen
Summary: The study investigated the effects of barite particle mass fraction and particle size distribution on settling and sag potential in oilbased drilling fluid samples. The settling rate was observed to be faster in samples with lower barite concentration, while longer suspension of particles was seen in the sample with higher density. Sieved barite particles in one sample showed weak destabilization after 7 days in the middle and bottom columns. The viscosity and viscoelastic-linear elasticity increased with barite concentration, resulting in lower dynamic sag at all shear rates.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Mohammadreza Kamali, Mahmoud Khalifeh, Arild Saasen, Rune Godoy, Laurent Delabroy
Summary: Portland cement is widely used in hydrocarbon wells but faces shortcomings in specific conditions. This study explores the performance of four alternative barrier materials in terms of rheological behavior, pumpability, and mechanical properties. The results show that the candidate materials have acceptable viscosity profiles and the thermosetting resin exhibits high compressive strength, while the geopolymer and pozzolanic slurry are more ductile.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Karl Ronny Klungtvedt, Arild Saasen
Summary: Core flooding tests are not practical for screening and adjusting drilling fluid compositions due to limitations in time, cost, and access to representative samples. A simplified method for testing mass change of ceramic discs has been suggested as a cost-effective alternative for comparing different drilling fluids.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Karl Ronny Klungtvedt, Arild Saasen
Summary: Formation damage caused by invasion of drilling fluid particles and polymers into porous formations was assessed using a methodology. The study found that invasion of CaCO3 and polymers led to formation damage, and the presence of fibers limited the invasion. Higher applied pressures and larger pore-throat openings resulted in greater formation damage. The addition of fibers also reduced fluid loss and improved filter-cake permeability.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Camilo Pedrosa, Arild Saasen, Jan David Ytrehus
Summary: The formation of cuttings-beds is a crucial consideration during wellbore drilling operations, especially in highly deviated or horizontal wells. This study analyzes the bonding strength and stress required to break the formed bed of wetted cuttings using granular rheology methodology. The results show that the composition of the interstitial fluid significantly impacts the shear strength of the bed, with water-based drilling fluid exhibiting higher cohesion compared to oil-based drilling fluids.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Energy & Fuels
Karl Ronny Klungtvedt, Jan Kristian Vasshus, Arild Saasen
Summary: Laboratory testing of lost circulation or loss prevention materials is typically conducted using permeable ceramic discs or sealing of slotted steel discs. The objective of this study was to design an experimental method for assessing the functionality of a drilling fluid to seal induced fractures in a porous formation, and to evaluate different fluid compositions using this method. Lower fluid loss was observed with oil-based fluids, but water-based fluids treated with loss prevention materials were more effective in sealing fractures.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Energy & Fuels
Karl Ronny Klungtvedt, Camilo Pedrosa, Arild Saasen
Summary: The filter-cake plays a critical role in reducing the wellbore permeability temporarily to prevent various issues. Its strength measurement is important for optimal drilling fluid design. By using a rheometer, the strength and flowability of filter-cakes were measured, and it was concluded that the addition of cellulose-based fibers can significantly increase the filter-cake strength.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
