bluuebunny/crossref_metadata_2025_split huggingface dataset:
Quality of life and mental disorders in the post-COVID period (systematic review)
Authors: Semakin A. V. , Fedosenko S. V. , Malinovskiy V. A. , Agaeva S. A. , Starovoytova E. A. , Kalyuzhin V. V. 
Published: January 2024

The 2019 novel coronavirus infection (COVID-19) pandemic has been a great burden for all of humanity. Soon after it began, researchers noticed that elimination of the virus from the body and recovery are not the end of the disease, since many patients did not return to their previous state of health, continued to complain of pathologies of various organs and systems, could not work, and some of them developed mental disorders.The aim of the review was to analyze and summarize published data on the quality of life and mental disorders in the post-COVID period. Using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) recommendations, 7,374 scientific works were found, of which 176 English-language and 276 Russianlanguage relevant publications were selected for analysis. The review included 17 (including 2 Russian-language) articles relevant to the topic of this review. Complaints of decreased memory and attention, appearing no later than 6 months after recovery from COVID-19, were reported by 3.2–9.1% of patients. Asthenic symptoms during the first month after the elimination of the novel coronavirus infection occurred in 55–70% of patients, and six months later – in every fifth patient. At the same time, post-viral fatigue more often affected women discharged from respiratory hospitals and persons with chronic bronchopulmonary pathology. Quite often, those who recovered from COVID-19 experienced insomnia and emotional disturbances, the frequency of which also correlated with the female sex and the severe course of the disease, which required hospitalization in the intensive care unit (ICU). In the post-COVID period, the development of depressive symptoms is not excluded, but sufficient evidence for this has not been obtained. The quality of life in these patients decreased. After discharge from the hospital, some patients remained unable to work, and some began to experience difficulties with self-care. However, over time, there is a trend toward restoration of the quality of life, which is especially evident in young people. In patients who have been in the ICU for more than 7 days, the rehabilitation potential is much lower. Psychopathological symptoms contribute to a decrease in the quality of life along with physical factors (persistent dyspnea, decreased exercise tolerance).
Study of wound-healing properties of humic substance – zinc complexes in the aseptic wound model in vivo
Authors: Zykova M. V. , Ivanov V. V. , Larionov K. S. , Azarkina L. A. , Buyko E. E. , Bratishko K. A. , Ufandeev A. A. , Rabtsevich E. S. , Mikhalev D. A. , Kopnov I. S. , Perminova I. V. , Belousov M. V. 
Published: January 2024

The aim was to investigate wound-healing properties of zinc-containing biocomposites based on humic ligands (humic substance (HS) – Zn) in the in vivo experiment on the aseptic wound model and to evaluate their resorptive properties.Materials and methods. The objects of the study were 5 samples of HS-Zn in the form of complex salts comprising fine black powders synthesized in the Laboratory for Natural Humic Systems of the Faculty of Chemistry at Moscow State University. The wound-healing effect of the substances was studied on 70 male Wistar rats using a traumatic model of an excisional aseptic skin wound. The degree of affected skin healing was evaluated during 21 days by the planimetric method. The resorptive properties of the HS-Zn samples were studied by inductively coupled plasma mass spectrometry (ICP-MS) in the biomaterial (blood serum, fur, skin from the wound surface).Results. It was found that course application of zinc-containing HS-Zn biocomposites to the wound surface led to a decrease in the wound area in comparison with ZnSO4 with the equivalent concentration of elemental Zn (1.67 mg/ ml). Two samples FA-Zn and Peat1-Zn showed the most pronounced regenerating effect. We noted an increase in Zn level in the tested skin samples from the wound area, in fur, and in the blood serum, which indicates the resorptive effect of zinc-containing HS-Zn biocomposites during course application; however, the parameters did not exceed limiting permissible concentrations. The correlation between the tested samples was not equal, which indicates a significant impact of the initial HS matrix on the Zn bioavailability.Conclusion. The observed reparative effect of zinc and HS complexes in the context of their low toxicity is of interest for further study to develop effective wound-healing preparations.
Levels of metalloproteinases and adipose tissue hormones in men with coronary atherosclerosis
Authors: Polonskaya Ya. V. , Kashtanova E. V. , Stakhneva E. M. , Ledovskikh S. R. , Garbuzova E. V. , Shramko V. S. , Kurguzov A. V. , Murashov I. S. , Sadovsky E. V. , Ragino Yu. I. 
Published: January 2024

Aim. To study the effect of adipose tissue hormones on the level of metalloproteinases in men with verified coronary atherosclerosis and to assess associations between the studied biomarkers and abdominal obesity.Materials and methods. The study included 96 men aged 58.9 ± 5.1 years: 80 men with angiographically verified atherosclerosis and class II–III angina pectoris and 16 men without atherosclerosis. Anthropometric parameters were measured in all patients, and their blood was taken on an empty stomach. The blood levels of adiponectin, leptin, resistin, adipsin, amylin, and metalloproteinases (MMPs) -1, -2, -3, -7, -9, -10, -12, -13 were determined by the multiplex analysis. Statistical processing of the results was carried out using the SPSS 13.0 software.Results. In patients with severe atherosclerosis, lipocalin, MMP-1, MMP-7, and MMP-12 levels were higher than in the control group. The blood concentration of adiponectin in patients with atherosclerosis was reduced. Inverse correlations were revealed between waist circumference and concentrations of MMP-1 and MMP-12, as well as between body mass index and MMP-1. A moderate direct relationship was revealed between resistin and MMP-2 and MMP-3; between amylin and MMP-9; between adiponectin and MMP-12; between leptin and MMP-7.Conclusion. The results obtained suggest a relationship between the level of damage markers and adipose tissue hormones, which lead to complications of cardiovascular diseases and explain the effect of obesity on atherosclerotic plaque destabilization.
The Influence of Implementing Government Accounting Standards Based on Competence with The Use of Accounting Information Systems as A Moderation Variable
Authors: Kristiana Ida , Erlangga Ega Priyatna , Sinarasri Andwiani 
Published: January 2024

This study aims to empirically prove the influence of the Human Resources Quality, Internal Control Systems, on the Successful Implementation of Accrual-Based SAP with the Utilization of AIS as a Moderation Variable for a study on the Central Java Provincial Government OPD using a saturated sample of 38 Central Java Provincial Government OPD. The statistical method used is Partial Least Square (PLS). The research results show that; HR Quality has a positive effect on the successful implementation of accrual-based SAP, Internal Control System has no effect on the successful implementation of accrual-based SAP, Utilization of AIS makes the relationship weaker between HR Quality and Successful Implementation of Accrual-based SAP, Utilization of AIS cannot moderate the relationship between Internal Control Systems and Successful Implementation of Accrual-based SAP.
Statistics and Case Studies of Drainage Frac Height and Zonal Contribution of Stacked Plays in the Midland and Uinta Basin
Authors: Ge Shuangyu , Bachleda Jana , Fidler Luke , Sigler Josh , Lv Tao , Liu Faye 
Published: January 2024

Abstract
In this study, we present statistics of the drainage behavior of 387 wells in the Midland and Uinta Basins, including drainage frac height (DFH), zonal contribution, and their variation throughout the life of the well. Case studies from both basins will also be presented to demonstrate how drainage information is utilized to achieve improved reservoir economics.
A geochemistry-based method is used to quantitatively monitor drainage evolution and zonal contribution, and their variation through time. Produced oils are correlated to their contributing intervals represented by rock samples, allowing for a detailed quantitative analysis of the drainage behavior of the well. Statistical analysis is conducted on the production allocation results of 387 wells to evaluate their drainage behaviors. The study also leverages key reservoir properties derived from geochemistry using Reservoir Characterization Indices (RCI) to provide insights into drivers of the drainage behavior observed.
In the Midland Basin, 90% of the P80 DFH (drainage frac height that covers 80% of production) falls between ~155’ to 400’, with a median of ~290’. In the Uinta Basin, it falls between ~80’ to 305’ with a median of ~210’. To evaluate the effectiveness of reservoir recovery, we also analyzed how much contribution is from outside the targeted interval, or "out-of-zone", vs. contribution from inside the targeted interval, or "in-zone" contribution. In the Midland Basin, the median "in-zone" contribution ranges from 65% to 100% for wells targeting Middle Spraberry through Wolfcamp. In the Uinta Basin, it ranges from 43% to 80% for wells targeting Castle Peak through Wasatch. Without considering the total reservoir thickness, the richness of geological zones in the Uinta Basin could be comparable to or even better than some of the zones in the Midland Basin based on the production contribution per 10 feet of thickness (PCPT). The Midland case presents that co-development wells show as much as 70% larger P80 DFH than parent wells. The staggered co-development approach outperforms stacked co-developed scenarios, having ~32% more contribution from superior reservoirs than other development scenarios. The Uinta Basin study compares cube-developed wells to individually developed wells. A significant observation is that ~40% of cube-developed wells exhibit a noticeable drainage change (&gt;20’), in contrast to only ~30% of individually developed wells, suggesting cube-developed wells effectively create SRV across the stacked reservoirs without overcrowding wells.
The study presents novel information about drainage behaviors and provides quantitative data for regional assessments and benchmarking in the Midland and Uinta Basin.
Real-time Awareness: A Novel Application of Fiber Optics to Optimize Simultaneous Operations of Drilling and Frac
Authors: Stark Price , Adil Faraaz , Woodward Beau , Treviño Julio , Steinhoff Chris , Gallegos Dana 
Published: January 2024

Abstract
It is challenging for asset management teams to balance the schedules of drilling rigs and frac fleets based on ever-changing schedule constraints and the potential of subsurface interference. These challenges increase as assets mature, causing last-minute changes in pad sequencing or pausing drilling and frac operations. To mitigate fracture-driven interactions (FDIs) and minimize schedule disruptions, the service company and operator team deployed disposable fiber optics in two lateral wells between adjacent drilling and frac operations. These fibers functioned as security fences, watching for approaching fractures heading for the drilling wellbore. The operator could immediately act on the completion pad if an approaching fracture threatened the rig.
Disposable fiber optics have existed for several years, gaining favor due to the ease of operation, low comparable cost, and value of the data provided. The value of the data includes using acoustic distributed sensing strain data to observe the approaching fractures from a nearby treatment well. The system can detect fractures that directly intersect the monitoring well and fractures passing nearby or approaching. For processing, machine learning (ML) systems, overseen by human analysts, monitored and identified FDIs in real-time and relayed them to the team managing the operation.
This operation is the first instance where disposable fiber, or any fiber, was used explicitly for managing simultaneous subsurface operations. Historically, fiber is considered a high-cost diagnostic, unsuited for this common operational challenge. Now, it is operationally and economically viable to use it for routine purposes.
Methods for Assessing Proppant Coverage Along the Lateral for Plug-And-Perf Treatments
Authors: Cramer David , Friehauf Kyle 
Published: January 2024

Abstract
This paper documents the results of diagnostic tests in a well that was equipped with measuring devices for analyzing pressure and acoustic behavior during multistage fracturing treatments. This well was also surveyed by an ultrasonic device for measuring the entry hole sizes of treated and untreated perforations. Well and treatment design parameters selected for scrutiny included cluster perforation density and the circumferential phase angle of entry holes with respect to elevation.
Perforation erosional analysis was performed on each frac stage of the diagnostic wells by comparing perforation sizes of treated perforations with intentionally untreated perforations to estimate the eroded area for each perforation, then applying a two-component erosion model to allocate proppant among all the clusters for that frac stage. The allocated proppant was then used to compute treatment uniformity and compared with allocation and uniformity values determined by the DAS provider. This unique dataset was used to perform five categories of analyses: pipe/casing friction pressure, step down testing, perforation entry hole erosion, treating pressure, and inter-cluster proppant allocation and uniformity.
Determination of perforation entry-hole erosion parameters are shown to have diagnostic value in assessing treatment confinement and identifying deviations from standard erosion theory. The impact of variable and uncertain initial (untreated) entry hole sizes is shown to adversely impact the accuracy of both DAS and erosion-based proppant allocation routines. Evidence is provided quantifying the negative effect of proppant separating from the fluid stream due to inertia on the accuracy of treatment distribution provided by DAS interpretation.
A Successful Acid Fracturing Treatment in Asphaltene Problematic Reservoir, Burgan Oilfield Kuwait
Authors: Al-Shammari A. , Sinha S. , Sheikh B. , Youssef A. , Jimenez C. , Al-Mahmeed F. , Al-Shamali A. 
Published: January 2024

Abstract
The Burgan Marrat Reservoir is a challenging high-pressure, high-temperature carbonate oil reservoir dating back to the Jurassic age. This specific reservoir within the Burgan Field yields light oil, but it has a significant issue with Asphaltene deposition in the wellbore. Additionally, its well productivity is hampered by low matrix permeability. Addressing these challenges is crucial, and a successful acid fracturing process can not only enhance well productivity but also address Asphaltene-related problems.
This study delves into a comprehensive methodology that was employed. The focus of well selection was on ensuring good well integrity and maintaining a considerable distance from the oil-water contact (OWC). The approach involved conducting a Multi-Rate test followed by pressure build-up to establish a baseline for understanding the reservoir's behavior, including darcy and non-darcy skin.
The treatment design aimed at better fluid loss control and initiating highly conductive fractures in the reservoir. Specific measures, such as using suitable diverters and acid, were employed to maximize the length of the fractures. To validate the approach, a nodal analysis model was fine-tuned to predict how the well would perform under these conditions.
The results post-stimulation were impressive. There was a substantial improvement in well production and flowing bottom hole pressure. In fact, the productivity index of the well increased significantly, representing a substantial enhancement in output. The pressure build-up test after the fracture demonstrated a linear flow within the fracture, indicating a successful treatment with a fracture half-length of approximately 110 feet and a negative skin, which signifies an improvement in flow efficiency. Furthermore, the treatment effectively mitigated the risk associated with Asphaltene deposition, a significant accomplishment given the historical challenges faced in this reservoir.
This success can be attributed to an innovative workflow that incorporated a meticulous surveillance plan, a well-thought-out fracturing treatment design, and the application of advanced nodal analysis. Together, these components not only optimized the well's performance but also paved the way for the development of similar high-pressure, tight carbonate reservoirs. This approach not only enhances productivity but also ensures successful mitigation of Asphaltene-related issues, marking a significant advancement in reservoir engineering techniques.
Managing Friction Pressures to Reduce Fuel Consumption and Emissions for a Fracturing Fleet
Authors: Beveridge Zacary , McLaughlin Nathan , Kakadjian Sarkis 
Published: January 2024

Abstract
Friction pressure has always been a limiting factor for placing water and proppant during a hydraulic fracture treatment. Mitigating friction pressure has relied heavily upon using chemicals to reduce the friction and ultimately the hydraulic horsepower required to complete the job. Costs to reduce friction pressure have always been associated with the type and amount of friction reducer (FR) used. Best practices being associated with using as little as necessary to achieve the treatment. On the contrary, utilizing the minimum amount of FR can increase overall costs for treatment due to increased fuel usage which leads to increased emissions. As the industry strengthens focus surrounding Environmental, Social, and Governance (ESG) and optimizing costs for well completions, this paper discusses a unique approach to decrease friction pressures, reduce fuel usage, and ultimately optimize the completions treatment and associated cost.
Using friction models based on laboratory data and fuel consumption models built from flowmeter measurement during treatment, various pumping scenarios can be combined to estimate fuel consumption for diesel and dual fuel engines at varying FR set points. Incorporating a friction pressure model allows for treating pressure to be estimated and used within the fuel consumption model. Providing commodity costs and emissions factors allows for understanding of total cost and emissions changes with increased FR usage. Varying FR usage, treatment rate, and number of pumps gives room for optimization and understanding of the variables that demonstrate the greatest effect on total costs and emissions.
Increasing FR leads to decreased treating pressure and required hydraulic horsepower which reduces fuel consumption and generated emissions. The cost reductions depend on commodity prices as well as the types of fuel used (diesel or a blend of diesel and natural gas). Utilizing current market pricing, an increase in FR concentration from 0.4 gal per thousand to 0.6 gal per thousand resulted in a decrease in overall costs of nearly 5% per pumping hour and emissions reductions of up to 15.9%. By changing the conventional wisdom of lowering costs by reducing chemical concentrations to optimizing based on the bigger picture, emissions, treatment costs, and equipment utilized are reduced. Additional horsepower can be utilized for backup and further reduce non-productive time and increase efficiency. With proper planning and understanding, this solution will provide a more efficient environment for completions.
In-Basin Sand Performance in the Permian Basin and the Case for Northern White Sand
Authors: Malone M. R. , Bazan L. W. , Eckart M. J. 
Published: January 2024

Abstract
Proppant selection, and the resulting dimensionless fracture conductivity, impacts well performance. Proppant quality standards were developed to quantify proppant performance using dimensionless fracture conductivity, correlating the flow potential of the propped fracture relative to the formation. Since 2018, there has been a near complete switch to in-basin sand (IBS) for completing oil and gas wells in the Permian Basin. The switch to IBS has primarily been based on the idea that overall well and field economics are improved because: 1) capital costs are lowered by sourcing sand locally reducing costs and logistics, and 2) well results using IBS were "good enough" in terms of well performance justifying the use of inferior proppants. Little regard is given to the long-term production impacts, field development value and cumulative free cash flow over a five-to-ten-year horizon.
Rystad Energy (2022) evaluated 850 wells from seven operators in both the Midland and Delaware basins and provided clear evidence that the perceived benefits of using IBS to complete Wolfcamp A (WCA) wells in the Permian is not accurate. The Rystad Energy studies will be reviewed in detail. This manuscript presents extensive hydraulic fracture modeling and production simulations of the WCA formation for both the Delaware and Midland basins using 100- and 40/70-mesh to identify the conductivity difference between IBS and NWS to provide an engineering basis for the Rystad Energy results. Conductivity differences for each mesh and sand type ultimately allowed a comparison of well production and net cash flow for P50 wells. The WCA production forecast cases were calibrated to the published Rystad Energy data, where possible, and EUR values. The payout, cumulative production differences and net cash flow are presented comparing IBS and NWS materials.
Comparing results between NWS and IBS provides an engineering basis that NWS characteristics drive superior well performance in the Permian basin. As fracture conductivity increases, either from using NWS material or larger mesh sizes, the well production also increases over time. This is also the general conclusion from the Rystad study. This work demonstrates that NWS, while more expensive upfront, performs better throughout the well life, and is almost always the better economic choice and shows a long-term benefit using NWS. Utilizing IBS in the Permian basin results in suboptimal cashflow and reduced long-term profitability.
The well performance using IBS is expected to progressively worsen over time. This work demonstrates fractures in the Permian basin are conductivity limited and using IBS negatively affects cash flow and long term well deliverability. NWS is a superior product to IBS and generates enhanced fracture conductivity and production in the Delaware and Midland basins.