Hydraulic Fracturing as Game Changer to Maximize Waterflooding Efficiency in a Brownfield

2022 ◽  
Author(s):  
Maria Serena Magna Detto Calcaterra ◽  
Pierluigi Sedda ◽  
Giacomo Fulceri ◽  
Salvatore Luppina ◽  
Luca Mauri ◽  
...  
Keyword(s):  
Hydraulic Fracturing ◽  
Service Providers ◽  
Lessons Learned ◽  
Sweep Efficiency ◽  
The Past ◽  
Coiled Tubing ◽  
Margin Of Error ◽  
Support Optimization ◽  
Oil Rim ◽  
Rate Of Success

Abstract Primary production mechanism of a clean sandstone reservoir in a brownfield for oil production has been recently changed from natural depletion to waterflooding. Despite the apparently moderate petro-physical properties of the formation, injector wells performances were observed to be extremely poor, mainly due to: high drilling-induced formation damage and Fluids interaction within the reservoir (injection across the oil rim section). Several stimulation technologies have been applied to improve wells injection capability for pressure support optimization. Re-perforation via abrasive jetting, perforations wash through coiled tubing and various acid formulations via bullheading were attempted without achieving any significant increase in injectivity. Considering the modest rock permeability, the need to access a wider formation area to improve oil sweep efficiency and the crucial requirement to re-pressurize the reservoir, an additional card was played as last resort: hydraulic fracturing. This technique was not new to the area and already experimented by different operators. Several producer wells in different layers were hydraulic fracturing stimulated with proppant and/or acid in the past with a good rate of success. Why not to try then? Given the past experience on the same field with hydraulic fracturing in oil producers and accounting for well integrity and potential injectivity, one was chosen as suitable candidate. Offset wells hystorical data were used to build a hydraulic fracturing reservoir model and plan for the activity in details; operator and service providers engaged in a Frac Well On Paper activity in order to reduce any margin of error during field operations. An approach that proved successful. From there, the first trial well was planned and performed successfully. 4 other hydraulic fracturing jobs on 4 wells followed at close distance in time with different, but steadily comforting, results. Injection was improved from negligible initial values up to 2000 mc/day for the post-stimulation condition, exceeding the preliminary expectations. This paper introduces the steps taken to start the hydraulic fracturing campaign, the decision process that led to the design of the treatment, an overview of the execution phases, results well by well and lessons learned to optimize future campaigns.

Evolution of Hydraulic Fracturing Operations & Technology Applications in India

2021 ◽  
Author(s):  
Ravi Ramniklal Gondalia ◽  
Amit Sharma ◽  
Abhishek Shende ◽  
Amay Kumar Jha ◽  
Dinesh Choudhary ◽  
...  
Keyword(s):  
Hydraulic Fracturing ◽  
Service Providers ◽  
High Volume ◽  
Operational Strategies ◽  
Technology Application ◽  
The Past ◽  
Multi Stage ◽  
Technology Applications ◽  
Fit For Purpose ◽  
Reservoir Type

Abstract From 2005 to 2020, the application of hydraulic fracturing technology in India has touched the length and breadth of the country in almost every basin and reservoir section. The variety of reservoirs and operating environment present in India governed this evolution over the past 15 years resulting in a different fit for purpose fracturing strategy for each basin varying from conventional single-stage fracturing (urban, desert & remote forested regions) to high volume multi-stage fracturing, deepwater frac-packs and offshore ultra-HPHT fracturing. The objective of this paper is to present the milestones along this evolution journey for hydraulic fracturing treatments in India from 2005 to 2020. This paper begins with a review of published industry literature from 2005 to 2020 categorized by reservoir type and the proven economical techno-operational fracturing strategy adopted during that period. The milestones are covered chronologically since the success or failure of technology application in one basin often influenced the adoption of novel hydraulic fracturing methods in other basins or by other operators during the initial years. The offshore evolution is branched between the west and the east coasts which have distinctly different journeys and challenges. The onshore evolution is split into 5 categories: Cambay onshoreBarmer Hills & Tight GasEast India CBM and shale gasAssam-Arakan BasinOnshore KG Basin Each of these regions is at different stages of evolution. The Barmer region is in the most advanced state of evolution with frac factories in place while the Assam-Arakan Basin is in a relatively nascent stage. Figure 1 presents estimated hydraulic stage count based on published literature underlining the exponential growth in hydraulic fracturing activity in India. This paper enlists the technical and operational challenges present in the onshore and offshore categories mentioned above along with the identified novel techno-operational strategies which have proven to be successful for various operators in India. A comparison is presented of the different timelines of the exploration-appraisal-development journey for each region based on the economic viability of fracturing solutions available today in the Industry. Lastly, specific non-technical challenges related to available infrastructure, logistics and social governance are discussed for each region. This paper concludes by identifying the next step-change in the evolution of hydraulic fracturing operations in India among the 5 categories. Each of Government, operators and service providers have important roles to play in expanding the adoption of this technology in India. These roles are discussed for each identified category with the perspective of continuing the country's journey towards energy security.

Pushing the Boundaries of Plug Milling in Deformed Liners – Best Practices and Lessons Learned

2021 ◽  
Author(s):  
Saad Hamid ◽  
Vikram Unnikrishnan ◽  
Abdulrahman Aljughayman
Keyword(s):  
Best Practices ◽  
Hydraulic Fracturing ◽  
Video Camera ◽  
Lessons Learned ◽  
Metal Loss ◽  
Coiled Tubing ◽  
Milling Operations ◽  
Outer Periphery ◽  
Calculated Risk ◽  
Pass Through

Abstract This paper presents a systematic workflow/methodology developed to evaluate the milling operations using coiled tubing to remove frac plugs in a well with deformed liner, post hydraulic fracturing. This paper also presents the challenges encountered during intervention and steps on how they were mitigated. The well was completed by hydraulic fracturing of five stages, each separated by a frac plug. Post stimulation, coiled tubing was mobilized to mill the plugs and provide a full bore to begin production. After spending substantial time while attempting to mill in the initial run, decision was made to POOH and inspect the BHA. It was observed that the mill had significant metal loss on the outer periphery with no damage to the mill face, which thereby concluded the presence of liner damage. A strategy was developed on how to remediate this challenge. Multiple coiled tubing diagnostic runs were performed with real-time coiled tubing capabilities, which included cleanout, camera and caliper runs. Results of each coiled tubing run performed was carefully evaluated to estimate the extent of liner damage. The caliper and video camera runs were important to determine the new reduced ID of the liner. An initial milling attempt with a 3.33" OD mill was performed, which was the smallest size based on the plug manufacturers recommendation. However due to the specific nature of liner damage it could not pass through the restriction. After further discussions, a calculated risk was taken to run with a 3.125" OD mill, which was significantly smaller than the manufacturer's recommendation, and posed an inherent threat of milling through the core of the plug, while leaving the slips intact. This however did not happen, and all four plugs were successfully milled out from the liner, allowing full bore access and well to be flowed back. This paper will act as a guideline on how to design and execute an intervention operation in deformed liners.

Lessons Learned From EHDI: Where Do We Go From Here?

2012 ◽  
Vol 22 (1) ◽  
pp. 22-31
Author(s):  
Tamala S. Bradham ◽  
K. Todd Houston ◽  
Karen Muñoz
Keyword(s):  
Hearing Loss ◽  
Service Providers ◽  
Hearing Screening ◽  
Lessons Learned ◽  
Program Administrators ◽  
The Past ◽  
Significant Achievement ◽  
Birthing Center ◽  
Children With Hearing Loss ◽  
The U.S

Over the past 60 years, experts have made tremendous strides to establish and strengthen early hearing detection and intervention (EHDI) programs in all 50 states and the U.S. territories. Today, approximately 97% of all newborns are screened for hearing loss prior to discharge from a birthing center or hospital (White, Forsman, Eichwald, & Muñoz, 2010). This level of hearing screening is a significant achievement that requires ongoing collaboration among program administrators, policymakers, service providers, and, most importantly, families and children with hearing loss. Although we have learned many lessons that have strengthened the efficiency of the EHDI system, challenges do remain. In this paper, we will share lessons learned in the trenches and provide insights into where we go from here.

Multistage Horizontal Well Hydraulic Fracturing Stimulation Using Coiled Tubing to Produce Marginal Reserves from Brownfield: Case Histories and Lessons Learned

2015 ◽  
Author(s):  
Amro Ahmad Hassan ◽  
Ahmed Ali Mohamed Abdel Meguid ◽  
Sayed Arshad Waheed ◽  
Mohamed Salah ◽  
Essam Abdel Karim
Keyword(s):  
Hydraulic Fracturing ◽  
Horizontal Well ◽  
Lessons Learned ◽  
Case Histories ◽  
Coiled Tubing

Novel Coiled Tubing Perforation Approach Enables Efficient Multistage Hydraulic Fracturing Operations in a Horizontal Well in Oman

2016 ◽  
Author(s):  
Ali Al-Ghaithi ◽  
Fahad Alawi ◽  
Ernest Sayapov ◽  
Ehab Ibrahim ◽  
Najet Aouchar ◽  
...  
Keyword(s):  
Hydraulic Fracturing ◽  
Horizontal Well ◽  
Multistage Hydraulic Fracturing ◽  
Coiled Tubing

“We Are All Humans and Deserve a Decent Way to Go”: Examining Professional’s Experiences With Providing End-of-Life Care in Correctional Institutions

2021 ◽  
pp. 073401682110208
Author(s):  
Mollee Steely Smith ◽  
Brooke Cooley ◽  
Tusty ten Bensel
Keyword(s):  
End Of Life ◽  
End Of Life Care ◽  
Service Providers ◽  
Prison Population ◽  
Correctional Institutions ◽  
Southern State ◽  
Face To Face ◽  
The Past ◽  
Eol Care ◽  
Emotional Effects

The aging prison population has increased dramatically over the past two decades. As this population increases, correctional institutions are faced with health care challenges. Specifically, providing adequate end-of-life (EOL) care for terminally ill inmates has been a concern. Despite issues relating to providing EOL care, little is known about medical and correctional staff’s attitudes toward the implementation of EOL care. The purpose of this study was to understand the challenges faced by correctional and medical professionals, focusing on job satisfaction, obstacles, and emotional effects of providing EOL care in correctional institutions. Our data included 17 semistructured, face-to-face interviews with medical and correctional staff assigned to the EOL care unit in a southern state. Although the entire sample stated overall satisfaction with their job, participants noted several challenges and stressors, which included the lack of resources and difficulties in balancing care. Participants agreed that it was emotionally stressful to maintain appropriate relationships with the inmates, deal with patient manipulation, and be surrounded by dying and death. Implications are discussed relative to the needs and experiences of service providers and how to more effectively treat EOL inmate patients.

Evaluating a Functional Family Therapy Intervention: Challenges and Lessons Learned

2021 ◽  
pp. 104973152098560 ◽  
Author(s):  
Katarzyna Celinska
Keyword(s):  
Family Therapy ◽  
Service Providers ◽  
Evaluation Research ◽  
Evaluation Process ◽  
Outcome Evaluation ◽  
Lessons Learned ◽  
Functional Family Therapy ◽  
Functional Family ◽  
Family Based

Purpose: This case study is the introspective account of the evaluation process of Functional Family Therapy (FFT) as implemented in Middlesex County in New Jersey between 2005 and 2011. The study presents challenges and issues in evaluation falling into three main categories. Methods: The case study is based on the recollections and documented experiences of the author who was responsible for all major aspects of the evaluation including designing the study, collecting the data, and handling daily evaluation activities. Results: The author differentiated among three main categories of challenges. In respect to research design, the relative merits of experimental versus nonexperimental designs and quantitative versus qualitative research methods are discussed. The second set of issues involves developing and exercising the social competence skills necessary to form working partnerships with service providers. The third set encompasses logistical barriers encountered during daily evaluation activities. Conclusions: The challenges and lessons learned from conducting the outcome evaluation of FFT are situated within scholarly debates on evaluation research, with the goal of providing further insights into the on-the-ground implementation and process of program evaluations. The experiences, recollections and processes illustrate challenges and solutions applicable to evaluations of other family-based violence prevention interventions.

Experience

2021 ◽  
Vol 13 (1) ◽  
pp. 1-16
Author(s):  
Michela Fazzolari ◽  
Francesco Buccafurri ◽  
Gianluca Lax ◽  
Marinella Petrocchi
Keyword(s):  
Relative Frequency ◽  
Service Providers ◽  
Real Data ◽  
Online Reviews ◽  
Purchase Decision ◽  
The Past ◽  
Supervised Classifiers ◽  
Relative Frequency Distribution ◽  
Opinion Spam ◽  
Fake Reviews

Over the past few years, online reviews have become very important, since they can influence the purchase decision of consumers and the reputation of businesses. Therefore, the practice of writing fake reviews can have severe consequences on customers and service providers. Various approaches have been proposed for detecting opinion spam in online reviews, especially based on supervised classifiers. In this contribution, we start from a set of effective features used for classifying opinion spam and we re-engineered them by considering the Cumulative Relative Frequency Distribution of each feature. By an experimental evaluation carried out on real data from Yelp.com, we show that the use of the distributional features is able to improve the performances of classifiers.

scholarly journals Moving through Motherhood: Involving the Public in Research to Inform Physical Activity Promotion throughout Pregnancy and Beyond

2021 ◽  
Vol 18 (9) ◽  
pp. 4482
Author(s):  
Victoria E. Salmon ◽  
Lauren R. Rodgers ◽  
Peter Rouse ◽  
Oli Williams ◽  
Emma Cockcroft ◽  
...  
Keyword(s):  
Physical Activity ◽  
Public Involvement ◽  
Service Providers ◽  
Physical Activity Promotion ◽  
Resource Development ◽  
Physical Activity Behaviour ◽  
Patient And Public Involvement ◽  
Lessons Learned ◽  
Activity Promotion ◽  
Development Outcomes

Information received by women regarding physical activity during and after pregnancy often lacks clarity and may be conflicting and confusing. Without clear, engaging, accessible guidance centred on the experiences of pregnancy and parenting, the benefits of physical activity can be lost. We describe a collaborative process to inform the design of evidence-based, user-centred physical activity resources which reflect diverse experiences of pregnancy and early parenthood. Two iterative, collaborative phases involving patient and public involvement (PPI) workshops, a scoping survey (n = 553) and stakeholder events engaged women and maternity, policy and physical activity stakeholders to inform pilot resource development. These activities shaped understanding of challenges experienced by maternity and physical activity service providers, pregnant women and new mothers in relation to supporting physical activity. Working collaboratively with women and stakeholders, we co-designed pilot resources and identified important considerations for future resource development. Outcomes and lessons learned from this process will inform further work to support physical activity during pregnancy and beyond, but also wider health research where such collaborative approaches are important. We hope that drawing on our experiences and sharing outcomes from this work provide useful information for researchers, healthcare professionals, policy makers and those involved in supporting physical activity behaviour.

scholarly journals Epidemiology of childhood tuberculosis after ceasing universal Bacillus Calmette–Guérin vaccination

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Sayori Kobayashi ◽  
Takashi Yoshiyama ◽  
Kazuhiro Uchimura ◽  
Yuko Hamaguchi ◽  
Seiya Kato
Keyword(s):  
Policy Change ◽  
Vaccine Coverage ◽  
Lessons Learned ◽  
Public Health Authority ◽  
Bacillus Calmette Guerin ◽  
Notification Rate ◽  
Bcg Vaccination ◽  
The Past ◽  
Childhood Tb ◽  
Selective Vaccination

AbstractUniversal Bacillus Calmette–Guérin (BCG) vaccination is recommended in countries with high tuberculosis (TB) burden. Nevertheless, several countries have ceased universal BCG vaccination over the past 40 years, with scarce comparative epidemiological analyses regarding childhood TB after the policy change. We analysed data on childhood TB in countries that ceased universal BCG vaccination. Data sources included national/international databases, published papers, annual TB reports, and public health authority websites. Childhood TB notification rate increased in one of seven countries with available data. Pulmonary TB and TB lymphadenitis were the main causes of increasing childhood cases, while changes in severe forms of TB cases were minor. Maintaining high vaccine coverage for the target group was a common challenge after shifting selective vaccination. In some countries showing no increase in childhood TB after a BCG policy change, the majority of childhood TB cases were patients from abroad or those with overseas parents; these countries had changed immigration policies during the same period. Heterogeneity in childhood TB epidemiology was observed after ceasing universal BCG vaccination; several factors might obscure the influence of vaccination policy change. Lessons learned from these countries may aid in the development of better BCG vaccination strategies.

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