bluuebunny/crossref_metadata_2025_split huggingface dataset:
Dynamic E-Line Conveyed Milling Solution Remediates Subsea (XT) Gate Valve Operating From RLWI
Authors: Ndjawe Yannick , Briere Benjamin , Lescoulie David , Bragas Arnaud , Penka Joel , Hernandez Andres , Macpherson Bill , Hallaire Maximilien , Borg Peder Løkke 
Published: March 2024

Abstract
An oil-producing subsea well located offshore Congo was equipped with an inoperable subsea vertical xmas tree (XT), in specific the production master gate valve in the vertical bore stuck at 55% to 65% open following the measurement of the valve stub. The inoperability of the valve actuators resulted in the temporary closure of the oil-producing well in 2017, as it was defined necessary by the operator well integrity policy, for this reason, the XT had to be replaced using a rigless light well intervention (RLWI), due to water depth of 800meter. In order to do so, temporary plugs needed to be run in hole to provide temporary barriers and allow the XT tree change-out to be completed. To achieve such an objective the partially open gate valve had to be milled out.
The operator issued a challenge to the oilfield services industry to present a solution to mill the partially open gate valve via RLWI vessel. The supplier responded with a solution that could mill the gate valve in a single run, including recovery of the milled coupon. In addition, the solution would ensure that all the operational well barriers remained free from obstruction in the event of the milling toolstring becoming stuck, with fishing contingencies also in place.
The resulting solution utilized a wireline-deployed milling toolstring equipped with a fully automated milling stroker, a metal matrix compound (MMC) core bit with an eccentric spear mechanism, shearable spacers, and contingency featuring an electric release fishing tool (ERFT). The benefits of this solution related to several areas; the surface read-out system allowed precise control of the milling BHA.
The partially open gate valve was successfully milled through, and the coupon recovered to the surface on a single run, with a total milling time of 14 hours and 40 minutes.
This paper discusses the challenges and solutions related to milling a partially open gate valve on a closed oil-producing subsea well using an RLWI vessel offshore Congo. It covers the project scope, solution design, planning, equipment preparation, job execution, and provides estimates of risk and cost reduction to as well the added production level resulting from this operation.
Casing Inspection and Cement Evaluation on Drillpipe: Logging in Parallel with Existing Intervention Runs
Authors: Hawthorn A. , Groves D. , Osunjaye G. 
Published: March 2024

Abstract
The oil and gas industry is in a state of continually challenging the way to improve the efficiency and safety of well construction activities. An interesting path has been followed in the last 30 years in the development and use of logging while drilling tools. The measurement quality and reliability of these tools for open hole formation evaluation and geosteering has propelled an entire sequence of highly complex and highly deviated wells with enormous improvements in productivity from existing fields. You would be hard pressed to find any wells, particularly in the offshore domain, that do not utilize logging while drilling measurements that were once the province of wireline tools only. This development of technologies and tools has, as stated above, largely focused on open hole and while drilling applications only. The same cannot be said for cased hole evaluation tools in general, and for well integrity tools that measure the condition and properties of the casing and cement in particular. This paper will demonstrate the development of a new drillpipe conveyed tool that can both measure the casing condition and what is in the annular space behind the casing. We will show examples from around the world of the tools and how this was qualified versus the existing wireline deployed technology. We will then show a case history from the deepwater West Africa area where the tools were run in parallel with existing intervention operations across a sequence of wells to both increase the efficiency of operations and to de-risk the operation. The basic premise of the tool is that a drill collar is fitted with three circumferential pulse echo ultrasonic transducers. This allows for a full azimuthal image of the casing and annular space behind the casing if the tool is rotated, either from a downhole device such as a mud motor, or by surface rotation through the rig rotary table or top drive. The tool can be run in real-time and also in memory mode, in either case data is both processed downhole and the raw waveforms can be recovered from the tool when back on surface. Analysis of the acquired data allows for interpretation of internal caliper, the thickness of the casing, the location of casing collars and an evaluation of the material in the annular space behind the first casing string. The need to provide oriented images means the tool has magnetometers, accelerometers and a basic gyro measurement device that can be used for orientation of downhole devices such as whipstocks or oriented perforations.
Intervention Synergy Improving Production Enhancement Efficiency for Remote Offshore Well Intervention Operation
Authors: Hanafi M. M. Mohamed , Ismail N. , Anoar I. , Ong V. , Hamzah S. , Anuar K. Khairul , Singh K. , Cavalleri C. , Yong N. , Zailani M. F. I. , Ramondenc P. , Hofacker M. 
Published: March 2024

Abstract
Pulsed neutron spectroscopy is commonly used in the Malay Basin for cased hole formation evaluation to assess development potential and reserve opportunities. Sandstone formations in many fields have caused complications due to sand deposition in mature wells, making logging operations difficult. This work explores the enhancement of operational efficiency on remote offshore platforms by utilizing coiled tubing to convey pulsed neutron evaluation, thereby addressing the demands associated with facilitating more-effective well access operation and formation evaluation assessment.
Electric coiled tubing (e-coil) systems have expanded evaluation logging applications; however, lifting heavy e-coil reels onto offshore sites, especially remote platforms, remains challenging. Battery-powered tools transmitted via fiber optic–enabled real-time coiled tubing (FOERCT), which although widely used in the past decade, have limitations such as restricted power supply and logging time. To overcome these challenges, our work introduces contemporary hybrid cables, similar in size and weight to traditional fiber optics but with high-power transmission capabilities called monocable-enabled real-time coiled tubing (MERCT) This innovation provides an efficient means of tool conveyance in offshore coiled tubing logging and enables broader remote platform operations.
The application introduced in this work harnesses hydraulic capabilities to supplement sand cleanout procedures preceding cased hole evaluation. Traditionally, these operations involve the deployment of two separate services, which increases the operational footprint and extends the time required for completion. The application of MERCT has effectively reduced the total bottomhole assembly length by eliminating battery subs, consequently obviating the necessity for offshore pressure deployment. This strategic modification significantly bolsters overall operational safety and has yielded a 83%-time savings compared to a traditional deployment method. The single-service deployment and simplification represents a twofold enhancement in efficiency when compared to the previously utilized pulsed neutron logging method.
This advancement enables the development of lightweight coiled tubing logging solutions that are well suited for the challenges posed by offshore environments, including surface and topside constraints. The synergy and plug-and-play setup offered by this innovative approach reduce equipment footprint and simplify the overall execution of operations. This leads to safer deployments while maintaining equivalent levels of effectiveness and efficiency.
Estimating the Importance of Nano-Silica Sealing Parameters for Remediating Leaks in CO2 Geological Storage
Authors: Olayiwola Olatunji , Coulibaly Nabaladiomon , Liu Ning , Guo Boyun 
Published: March 2024

Abstract
In carbon capture and sequestration methods, the possibility of carbon dioxide leaking via fissures formed in the geological storage is a major worry. A major risk is anticipated while fixing a micro-annuli leakage in CO2 storage with smaller apertures. There is a need for a low-viscosity substance that can offer a strong, resilient seal. Sealing these leaks and stopping CO2 migration might be possible with a novel use of nano silica (NS) gel. The suitability of nano silica gel for sealing cement fractures was investigated in this work through laboratory testing. While examining the rheological properties of nano silica gels, it was found that the concentration of nano silica rose as the gel strength and yield point increased. Furthermore, it was discovered that when the concentration of nano silica rises, so do the sealing and leakage pressures, which are the pressures prior to and following CO2 breach, respectively. With a typical 15% nano silica concentration in gel, a sealing pressure gradient of 30 psi/in and a leakage pressure gradient of 3 psi/in at a leaking rate of 0.01 liter/min were found. The pressure performance increases from the starting pressure of 0 psi to the regeneration sealing pressure of 600 psi and the corresponding leakage pressure of 350 psi at 21% nano silica concentration when the test is repeated after a day without injection operation. This study offers a cutting-edge plan for fixing leaks in the geological storage of CO2 and cutting down on idle time while the sequestration process is underway.
Enhancing Reservoir Zonation through Triple Porosity System: A Case Study
Authors: Hashemi Reza , Saberi Fatemeh , Asoude Pourya , Soleimani Bahman 
Published: March 2024

Summary
The Asmari-Jahrom reservoirs, located in southwest Iran, are recognized as one of the major fractured reservoirs in the world. Understanding the role of fractures in enhancing hydrocarbon flow and permeability is of utmost importance. In this study, petrophysical conventional logs [neutron porosity (NPHI), density (RHOB), sonic (DT), and gamma ray (GR)] and advanced image logs [formation microresistivity imaging (FMI)] were used to investigate the reservoir properties. The novelty of this study lies in the implementation of triple porosity on reservoir quality and identification of flow units in Asmari-Jahrom reservoirs using petrophysical and borehole image logs. By quantifying fracture and vuggy porosity and correlating them with velocity deviation log and fracture parameters [fracture aperture (VAH) and fracture density (VDC)], it was demonstrated that fracture porosity is directly related to VAH. High peaks were observed in fracture parameters, particularly in VAH diagrams where the velocity deviation log was negative and low. Total porosity from density logs was found to match secondary porosity from petrophysical logs, validating FMI results. However, FMI log resolution was higher, enabling clearer identification of fracture porosity peaks. The velocity deviation log indicated that the predominant type of porosity in the reservoir was matrix (primary) porosity. However, fracture and vuggy porosity were also observed in certain zones. Based on indirect evidence such as drilling mud loss, porosity type (matrix, fracture, and vuggy), porosity amount, and oil saturation, 18 zones were identified to determine quality zones with appropriate reservoir quality. Asmari-Jahrum reservoirs were found to possess high storage and flow capacity. The presence of multiple fracture types, especially longitudinal fractures, contributed to the development of secondary porosity and enhanced flow unit quality. Despite their complexity, these fractured carbonate reservoirs were analyzed comprehensively through integrated petrophysical and FMI log interpretation, enabling optimized reservoir performance and facilitating hydrocarbon production.
Allium sativum and Group B Streptococcus: antimicrobial and synergistic activity
Authors: Lima Sônia Maria Rolim Rosa , Gamberini Maria Thereza , Rodrigues Domingos Sávio , Junior Pedro Ismael da Silva , Torres Kátia Andrea de Menezes 
Published: March 2024

Abstract
Objective
The study aimed to evaluate the antimicrobial activity of the SP80 fraction (obtained from Allium sativum) and its synergism with the antibiotic against strains of GBS.
Methods
The broth microdilution and disk diffusion assays were used to determine the antimicrobial and synergistic activity of Sep-pak 80% (SP80) in combination with ampicillin and penicillin G, respectively.
Results
The results showed that the combination of SP80 and antibiotics respectively showed an additive effect.
Conclusions
The SP80 fraction has antimicrobial activity against GBS, and the association with the antibiotic has an additive effect.
Numerical modeling of interactions between a flow slide and buildings: a case study of Yahuokou landslide
Authors: Zhang Zelin , Liu Jing , Dou Xiaodong , Wang Tao 
Published: March 2024

Abstract
To examine the impact force of the sliding mobility damaging building structures, this study performs inverse modeling of the dynamic response characteristics of building structures under the impact of the Yahuokou landslide. On July 19, 2019, a landslide occurred in Dongshan Town, Zhouqu County, Gansu Province. Nearly 3.92 × 106 m3 of material suddenly lost stability and slid downhill. The sliding body piled up at the foot of the slope and blocked the river. Using the results of a field investigation, the engineering geological background of the Yahuokou landslide is presented in detail. A numerical method is presented to simulate the runout process of the sliding debris and its impact effect on building structures. The smoothed particle hydrodynamics (SPH)-finite element method (FEM) fluid–structure coupling method is implemented to simulate the landslide dynamic disaster process (the impact behavior for buildings). The sliding debris is simulated using the SPH method, and the building structures are simulated using FEM. The velocity variation trends and moving distances of the sliding body in different zones show different evolution characteristics. The landslide debris flow impacts the building, causing part of the structure to be completely destroyed and buried. Part of the broken wall structure moves forward under the impact of the landslide, with the first part of the affected wall unit moving the farthest; this is characterized by “impact collapse.” Studies of detritus flows are helpful to further analyze the disaster mechanisms of landslides, predict their disaster scope, and provide references for landslides with similar geological conditions in China.
Sexual and Reproductive Health Services Accessibility and its Role in Female Genital Mutilation Reduction: Insights from Handeni District, Tanzania
Authors: Moshi Veronica , Mushi Lawrencia , Anasel Mackfallen 
Published: March 2024

Abstract

Background
Female genital mutilation (FGM) is a harmful cultural practice prevalent in various nations, causing severe health consequences and violating human rights, primarily affecting young girls. Handeni District, located in the Tanga Region, has a high FGM prevalence of approximately 70%, especially among the Maasai and Zigua tribes. This study evaluates the contribution of an Alternative rite of passage project aimed at reducing FGM through the promotion of Sexual and Reproductive Health Services (SRHS).
Methods
The study employed a cross-sectional design and utilised a concurrent mixed-method approach. The total sample size for the study included 385 participants, comprising 13 key informants and 372 respondents who completed a questionnaire. Quantitative data were analysed using Stata 14, involving inferential and descriptive statistics to explore associations between variables and become familiar with the data. Qualitative data were analysed with Atlas.ti, incorporating thematic and narrative analysis to identify overarching themes and gain insights into how individuals construct and communicate their experiences through narratives.
Results
The findings revealed a significant association (χ2 = 129.1208, Pr = 0.000) between the two variables. Notably, for every one-unit increase in "Use of SRHS," FGM practice tends to decrease by approximately 0.1613 units.
Conclusion
The study provides and emphasizes the critical role of community empowerment, geographical accessibility, cultural sensitivity, education, and data-driven decision-making in strengthening initiatives for the community-based promotion of Sexual and Reproductive Health Services (SRHS). It underscores the pressing need to address the high prevalence of Female Genital Mutilation (FGM) and highlights the positive impact of community-based initiatives in reducing FGM practices. The integration of SRHS initiatives is emphasized as a crucial component in the broader strategy to combat FGM. Overall, the study advocates for a comprehensive approach that combines community-focused measures with targeted efforts to enhance SRHS accessibility and awareness, particularly in the context of combating the harmful cultural practice of FGM.
Glyphosate contamination in European rivers not from herbicide application?
Authors: Schwientek Marc , Rügner Hermann , Haderlein Stefan , Schulz Wolfgang , Wimmer Benedikt , Engelbart Lisa , Bieger Sarah , Huhn Carolin 
Published: March 2024

Abstract

The most widely used herbicide glyphosate contaminates surface waters around the globe. Being toxic to aquatic organisms and a possible carcinogenic, mitigation strategies attempt to reduce river contamination, but their impact is not evaluated. Investigating long-term time series, we discovered that – in contrast to the USA – glyphosate river water concentration patterns in Europe contradict a dominant input from herbicide application. Our large meta-analysis clearly shows that for decades, the main source of glyphosate has been municipal wastewater, visible in the close correlation to concentration patterns of, e.g., pharmaceuticals, rather high and constant loads all over the year and failure of mitigation strategies. We suspect that glyphosate enters European rivers as a transformation product of aminopolyphosphonates, which are used in European but not U.S. detergents.
Negative Mood is Associated with Sociobehavioral Factors Contributing to Cardiovascular Risk in an Immigrant Population
Authors: Tranby Brianna N. , Sia Irene G. , Clark Matthew M. , Novotny Paul J. , Lohr Abby M. , Pardo Laura Suarez , Patten Christi A. , Iteghete Sheila O. , Zeratsky Katherine A. , Rieck Thomas M. , Molina Luz , Capetillo Graciela Porraz , Ahmed Yahye , Dirie Hana , Wieland Mark L. 
Published: March 2024

Abstract

Background Immigrants to the United States, on average, accumulate cardiovascular risk after resettlement, including obesity. There is a need to co-create interventions to address these disparities, and mood may be an important mediating factor.Methods The Healthy Immigrant Community (HIC) study, set in southeast Minnesota, enrolled 475 adult participants in a weight loss intervention to reduce cardiovascular risk. Baseline questionnaires assessed mood, nutrition, physical activity, self-efficacy for healthy eating and physical activity, social support, and cohesion. A single-item mood rating of poor or fair was considered “negative”, while ratings of good, very good, or excellent were considered “positive”.Results A total of 449 HIC participants (268 Hispanic/Latino and 181 Somali) with complete baseline measures and were included in this analysis. Participants endorsing negative mood compared to those endorsing positive mood had lower scores for healthy eating (p = 0.02) and physical activity levels (p = 0.03), lower confidence in eating a healthy diet (p = 0.001), and felt less of a sense of belonging to their community (p = 0.01). Those endorsing negative mood also reported receiving less social support from their family and friends to eat healthy (p = < 0.001) and be physically active (p = 0.01), and less often accessed community resources for healthy eating (p = 0.001) and physical activity (p = < 0.01) compared to participants reporting positive mood.Conclusions Negative mood was associated with less healthy nutrition, lower confidence in eating healthy, sedentary lifestyle, and perceived lack of belonging to the community. Integrating mood management and self-efficacy strategies may enhance the effectiveness of lifestyle interventions among immigrants who report negative mood.ClinicalTrials.gov registration: NCT05136339; April 23, 2022
Soil water regime and nutrient availability modulate fine root distribution and biomass allocation in Amazon forests with shallow water tables
Authors: Checa-Cordoba Edher , Esteban Erick J. L. , Emilio Thaise , Lira-Martins Demétrius , Schietti Juliana , Pinto José P. V. , Tomasella Javier , Costa Flávia R. C. 
Published: March 2024

Abstract

Background and Aims Shallow water table (WT) forests (representing ~ 50% of Amazonian land areas) exhibit different characteristics and functioning compared to the more widely studied deep WT forests. However, less is understood about the determinants of biomass structure and allocation in shallow WT forests. Here we investigate how limitation imposed by soil water, soil properties and nutrient availability influence the distribution of fine root biomass and the allocation of belowground and aboveground biomass in shallow WT forests, and the relationships with their stand structure.Methods We used extensive ground-based data on soil properties, soil nutrients, WT monitoring, and direct biomass measurements along a 600 km transect of shallow WT forests in the central Amazon region.Results Soil water excess, due to a wetter climate or a consistently shallow WT, restricts fine-root distribution to the upper soil layers. This restriction, alone or combined with phosphorus limitation, leads to a higher biomass allocation belowground, associated with stand structures characterized by a higher density of smaller trees. Opposite patterns are found where the soil experiences no excess water or does so infrequently. Soil fertility contributes to biomass partitioning, but with WT regimes strongly modulating its effects.Conclusion Soil water regime having an overarching control on fine-root distribution and biomass partitioning challenges the dominant perspective of allocation being mostly affected by soil nutrients and climate. These findings improve our understanding of a large fraction of the Amazon Forest, with important implications for modeling and predicting its resilience to climate change.