ADNOC's Smart Liner Initiative – A Step-Change in Matrix-Acid Stimulation Efficiency

2021 ◽  
Author(s):  
Kristian Mogensen ◽  
Graham Edmonstone
Keyword(s):  
Large Scale ◽  
High Rate ◽  
Rate Matrix ◽  
Reservoir Properties ◽  
Future Production ◽  
Pump Rate ◽  
Production Growth ◽  
Limited Entry ◽  
To Come ◽  
Stimulation Efficiency

Abstract ADNOC is progressing with large-scale rig-less high-rate matrix stimulation by deployment of advanced lower completions. A key contribution to future production growth is expected to come from these "Smart Liners" that rely on the principles of the limited-entry technique. The concept is based on a number of small, pre-drilled and unevenly spaced holes which enable an even distribution of acid along the entire reservoir drain to be stimulated. The smart liner incorporates swellable packers to avoid annular flow of acid to preferential zones and to isolate segments with heterogeneities. In this work, we focus on aspects related to planning, design and execution of high-rate matrix-acid stimulation of wells. We demonstrate that short wells need a different design approach compared to extended-reach wells and we provide guidelines on how to achieve the highest achievable pump rate and desired acid volume subject to reservoir, well and equipment constraints. The carbonate reservoirs typically exhibit considerable variation in permeability along the well, hence techniques for production profiling, such as inline tracers, are valuable for assessing the actual stimulation effectiveness. Wormhole penetration for a particular acid system will vary depending on the rock petrophysical properties and the reservoir properties; therefore, a systematic data analytics project is on-going.

Holistic Customized Approach to Address Practical Challenges for the Large Scale Implementation of Limited Entry Liners Completions at ADNOC Onshore Fields

2021 ◽  
Author(s):  
Noor Nazri Talib ◽  
Subba Venkata Ramarao ◽  
Kevin McNeily ◽  
Ernesto Barragan ◽  
Yugal Maheshwari ◽  
...  
Keyword(s):  
Large Scale ◽  
Injection Pressure ◽  
High Volume ◽  
Time Frame ◽  
Injection Rate ◽  
Minimum Time ◽  
High Rate ◽  
Productivity Index ◽  
High Pressure Pump ◽  
Limited Entry

Abstract Limited entry liners (LEL) implementation strategy is one of the key solutions to to improve the well productivity by maximizing the reservoir contact and matrix stimulation carbonate reservoirs. This strategy requires conducting high rate and high volume acid stimulation with high pressure pump after the installation of limted entry liner, that poses practical concerns to be addressed for adopting conventional well completions and existing resources. In addition, implementation of the LEL completion and stimulation for a large scale application within the minimum time frame and limited resources is a challenge. This paper provides the detail of challenges faced and solutions adopted to implement the LEL completions amd stimulation at onshore fields. Challenges including suitable candidate selection, completion design, limited materials for well construction to handle high-volume acid stimulation, limited well head injection pressure, contractual limitations for securing the tools and pumping equipment. Further, this paper discusses about the temporary solutions adopted for executing the LEL implementation in the best economical way within near future and provide the long term solutions for LEL implementation in the next 5 years business. The first three LEL completion wells that were successfully installed and stimulated at ADNOC Onshore are currently producing at more than 2 times higher PI (productivity index) compared to the pre-stimulation rate. The same apply to the injector wells, in which significant improvement on the injection rate of up to 18bbl/min (26000 bwpd) was observed. Currently ADNOC Onshore is planning to execute the LEL completion and stimulation in additional 15 wells during 2021 along with plan for up to 300 LEL completions during the next 5 years. The LEL technology is a key technology to support ADNOC lower completion strategy which aim to minimize the bare foot completions in order to increase the horizontal wellbore accessibility and effective stimulation. Overall, the first LEL installation and stimulation completed within 8 months from the candidate finalization using the existing resources available in ADNOC Onshore. This paper describes an economical solution for implementation of LEL completion strategy at large scale for major fields within minimum time frame by utilizing the existing resources while adhering to HSE rules.

scholarly journals High-Rate Transition Metal-based Cathode Materials for Battery-Supercapacitor Hybrid Devices

2021 ◽  
Author(s):  
Cong Wang ◽  
Zehao Song ◽  
Pei Shi ◽  
Lin Lv ◽  
Houzhao Wan ◽  
...  
Keyword(s):  
Large Scale ◽  
Rapid Development ◽  
Electronic Devices ◽  
High Rate ◽  
Specific Power ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Electrochemical Devices ◽  
Hybrid Devices ◽  
Scale Grid

With the rapid development of portable electronic devices, electric vehicles and large-scale grid energy storage devices, it needs to reinforce specific energy and specific power of related electrochemical devices meeting...

THE FOREST FOR THE TREES: SOCIETY AND THE HOUSEHOLD IN EARLY MODERN EUROPE

1998 ◽  
Vol 41 (4) ◽  
pp. 1161-1172 ◽  
Author(s):  
JOEL F. HARRINGTON
Keyword(s):  
Large Scale ◽  
University Of Pennsylvania ◽  
Italian Renaissance ◽  
German History ◽  
Early Modern Europe ◽  
Cambridge University ◽  
Johns Hopkins University ◽  
Big Picture ◽  
To Come ◽  
The Ideal

Gender relations in German history: power, agency, and experience from the sixteenth to the twentieth century. Edited by Lynn Abrams and Elizabeth Harvey. London: UCL, 1996. Pp. x+262. ISBN 1-85728-485-2. £12.95.Adultery and divorce in Calvin's Geneva. By Robert M. Kingdon. Cambridge, Mass., and London: Harvard UP, 1995. Pp. ix+214. ISBN 0-674-00520-1 (hb). £18.50.Housecraft and statecraft: domestic service in Renaissance Venice, 1400–1600. By Dennis Romano. Baltimore: Johns Hopkins University Press, 1996. Pp. xxvi+333. ISBN 0-8018-5288-9. £37.00.The European nobility, 1400–1800. By Jonathan Dewald. New approaches to European history, ix. Cambridge: Cambridge University Press, 1996. Pp. xvii+209. ISBN 0-521-42528-x (pb). £12.95.Garden and grove: the Italian Renaissance garden in the English imagination, 1600–1750. By John Dixon Hunt. Philadelphia: University of Pennsylvania, 1996. Pp. xix+268. ISBN 0-8122-1604-0 (pb). £23.50.Like an ancient woodsman or a guide through the Amazonian jungle, the ideal historian possesses at least two kinds of expertise: enough familiarity with the general terrain to plan successful expeditions and enough experience in the field to make inevitable adjustments to ‘the big picture’ when underway. Of course in the real world (of both geography and history) the tasks of exploration and cartography are often bifurcated, without necessarily disastrous results. The historian who is equally skilled at both close-up description and large-scale theorizing is consequently celebrated as a rare and valued anomaly. Meanwhile, for most of us stumbling scouts, the world beyond our familiar trails remains largely one of learned lore, with connections to our own limited forays often vague at best. Unless, of course, we are fortunate enough to come across something which provides an almost magical link between the narrow and the wide, the micro and the macro.

scholarly journals Rapid evolution at the Drosophila telomere: transposable element dynamics at an intrinsically unstable locus

Genetics ◽  
2020 ◽  
Vol 217 (2) ◽  
Author(s):  
Michael P McGurk ◽  
Anne-Marie Dion-Côté ◽  
Daniel A Barbash
Keyword(s):  
Copy Number ◽  
Large Scale ◽  
Insertion Site ◽  
Rapid Evolution ◽  
Interspecific Variation ◽  
High Rate ◽  
Evolutionary Strategy ◽  
Control Mechanisms ◽  
Genetic Conflict ◽  
Number Variation

AbstractDrosophila telomeres have been maintained by three families of active transposable elements (TEs), HeT-A, TAHRE, and TART, collectively referred to as HTTs, for tens of millions of years, which contrasts with an unusually high degree of HTT interspecific variation. While the impacts of conflict and domestication are often invoked to explain HTT variation, the telomeres are unstable structures such that neutral mutational processes and evolutionary tradeoffs may also drive HTT evolution. We leveraged population genomic data to analyze nearly 10,000 HTT insertions in 85  Drosophila melanogaster genomes and compared their variation to other more typical TE families. We observe that occasional large-scale copy number expansions of both HTTs and other TE families occur, highlighting that the HTTs are, like their feral cousins, typically repressed but primed to take over given the opportunity. However, large expansions of HTTs are not caused by the runaway activity of any particular HTT subfamilies or even associated with telomere-specific TE activity, as might be expected if HTTs are in strong genetic conflict with their hosts. Rather than conflict, we instead suggest that distinctive aspects of HTT copy number variation and sequence diversity largely reflect telomere instability, with HTT insertions being lost at much higher rates than other TEs elsewhere in the genome. We extend previous observations that telomere deletions occur at a high rate, and surprisingly discover that more than one-third do not appear to have been healed with an HTT insertion. We also report that some HTT families may be preferentially activated by the erosion of whole telomeres, implying the existence of HTT-specific host control mechanisms. We further suggest that the persistent telomere localization of HTTs may reflect a highly successful evolutionary strategy that trades away a stable insertion site in order to have reduced impact on the host genome. We propose that HTT evolution is driven by multiple processes, with niche specialization and telomere instability being previously underappreciated and likely predominant.

When the Complexity of the Large-Scale Development Project Becomes a Roadblock to Access to Justice

2021 ◽  
pp. 1-8
Author(s):  
Pillkyu HWANG ◽  
Yae-Ahn PARK
Keyword(s):  
Scale Development ◽  
Large Scale ◽  
Development Project ◽  
State Enterprise ◽  
Access To Justice ◽  
South Korean ◽  
Western Power ◽  
Power Company ◽  
Hydropower Dam ◽  
To Come

On 23 July 2018, when the villagers gathered around the porch to wrap up the day with a good chat, one of the five auxiliary dams of the Xe-Pian Xe-Namnoy hydropower dam in Attapeu province, the southeastern state of Laos, collapsed. Four days before the collapse, reports of cracks and subsidence started to come through. It should have been enough to prompt evacuation warning issuance by the Xe-Pian Xe-Namnoy Power Co. Ltd (PNPC), a consortium of South Korean companies SK Engineering and Construction (SK E&C) and Korea Western Power Company (KOWEPO), Thailand-based RATCH Group, and Lao Holding State Enterprise (LHSE). PNPC has a Concession Agreement with the Laos government ‘to plan, design, finance, construct, own, operate and maintain’ the Xe-Pian Xe-Namnoy hydropower dam. The warning was issued, but it came too late.

Neurofeedback for Opioid Dependent Patients in an Outpatient Setting: A Pilot Feasibility Study

2021 ◽  
Author(s):  
Helena A. Rempala ◽  
Justin A. Barterian
Keyword(s):  
Large Scale ◽  
The United States ◽  
Outpatient Setting ◽  
Opioid Use Disorder ◽  
High Rate ◽  
Treatment Center ◽  
Opioid Use ◽  
Treatment As Usual ◽  
Factors Affecting ◽  
Study Approach

Abstract Background: Neurofeedback (NF) has been described as “probably efficacious” when used in conjunction with other interventions for substance use disorders, including the most recent studies in population of individuals with opioid use disorder. Despite these promising outcomes, the seriousness of the opioid epidemic, and the high rate of relapse even with the most effective medication-assisted maintenance treatments NF continues to be an under-researched treatment modality. This article explores factors that affected the feasibility of adding Alpha/Theta Neurofeedback to treatment as usual for opioid dependence in an outpatient urban treatment center. The study strived to replicate previous research completed in Iran that found benefits of NF for opioid dependence.Methods: Out of approximately two dozen patients eligible for Alpha/Theta NF, about 60% (n=15) agreed to participate; however, only 2 participants completed treatment. The rates of enrollment in response to active treatment were monitored. Results: The 4 factors affecting feasibility were: 1) the time commitment required of participants, 2) ineffectiveness of standard incentives to promote participation, 3) delayed effects of training, and 4) the length and number of treatments required.Conclusion: The findings indicate a large scale study examining the use of NF for the treatment of opioid use disorder in the United States will likely be difficult to accomplish without modification to the traditional randomized control study approach and suggests challenges to the implementation of this treatment in an outpatient setting.

scholarly journals Persuasion Tactics in the Implementation of Large-Scale EHR Suites in Public Healthcare

2021 ◽  
Author(s):  
Gunnar Ellingsen ◽  
Bente Christensen ◽  
Morten Hertzum
Keyword(s):  
Large Scale ◽  
Healthcare Services ◽  
Governance Structure ◽  
Public Healthcare ◽  
Technical Literature ◽  
Health Authorities ◽  
To Come ◽  
Regional Health Authorities ◽  
Entrepreneurial Role ◽  
The U.S

Large-scale electronic health record (EHR) suites have the potential to cover a broad range of use needs across various healthcare domains. However, a challenge that must be solved is the distributed governance structure of public healthcare: Regional health authorities regulate hospitals, municipalities are responsible for first-line healthcare services, and general practitioners (GPs) have an independent entrepreneurial role. In such settings, EHR program owners cannot enforce municipalities and GPs to come on board. Thus, we examine what tactics owners of large-scale EHR suite programs apply to persuade municipalities to participate, how strongly these tactics are enforced, and the consequences. Empirically, we focus on the Health Platform program in Central Norway where the goal is to implement the U.S. Epic EHR suite in 2022. Theoretically, the paper is positioned in the socio-technical literature.

scholarly journals Leading in a VUCA World

2021 ◽  
Vol 20 (1) ◽  
pp. 89-111
Author(s):  
R Ramakrishnan
Keyword(s):  
Critical Period ◽  
Large Scale ◽  
Command And Control ◽  
Insufficient Information ◽  
Control Structures ◽  
The Future ◽  
Entire World ◽  
To Come ◽  
And Control ◽  
Crisis Leaders

The current COVID-19 virus has put the entire world in lockdown, creating one of the worst times of a VUCA world. The changes that are happening because of the pandemic are large scale and occur suddenly. There is a shortage of leadership everywhere. Leaders are unprepared to lead effectively. In this fast-changing and disruptive environment, command and control structures fail. Leaders are expected to act on incomplete or insufficient information. They do not know where to start to drive change as increased complexity makes it difficult. Leaders lack time to reflect and end up acting too quickly or acting too late as they get stuck in analysis paralysis. They are far removed from the source and are forced to act with a limited understanding of events and their meanings. The role and type of leadership are being tested as we are trying to come out of this crisis. Leaders cannot predict the future but need to make sense of it in order to thrive. This paper would analyse challenges that are being faced by leaders in this critical period and how these can be converted into opportunities like a vaccine for the virus.

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