Adaptation of Technologies Making Clean out Operations Environment Friendly and Cost Effective - Converting Failure into Success Using New Type of Fluidic Oscillator

2021 ◽  
Author(s):  
Barzan Ahmed ◽  
Farhad Abdulrahman Khoshnaw ◽  
Mustansar Raza ◽  
Hossam Elmoneim ◽  
Kamil Shehzad ◽  
...  
Keyword(s):  
Acoustic Pulse ◽  
Injection Pressure ◽  
Cost Effective ◽  
Injection Rate ◽  
Pumping Rate ◽  
Fluidic Oscillator ◽  
Injection Zone ◽  
Open Hole ◽  
The Impact

Abstract A case study is presented detailing the methodology used to perform the clean-out operation in a water disposal well of Khurmala Field, Kurdistan Region of Iraq. Untreated disposed water caused scaling and plugging in perforated liner and in the open hole that eventually ceased injection. Multiple attempts and investments were made in recent years to resume access to the injection zone using high-pressure hydro-jetting tools coupled with acid treatments. However, these attempts yielded futile efforts. Before proceeding with the decision of workover, it was decided to go for one final attempt to regain wellbore access using Fluidic Oscillator (SFO). Fluidic Oscillator (SFO) having pulsing, cavitation and helix jetting action was used in combination with a train of fluids consisting of diesel, 28% HCl and gel. The clean out was performed in stages of 10m, to clean the fill from 1091m to 1170m. Since the well bore was initially isolated from the injection zone, the cleanout was conducted with non-nitrified fluids. As the cleanout progressed and access to the liner and open hole was regained, the circulation of insoluble fill to surface required a lighter carrying fluid. Nitrification, volume of the fluids, batch cycling, and ROP were designed considering the downhole dynamic changes expected during each stage of the operation. The combination of SFO, the thorough selection of treatment fluids and the accurate downhole hydraulics simulations pertaining to different stages of the operation offered an effective solution and regained the connectivity between the wellbore and the injection zone. The injection rate of water increased from 0 bpm at 700 psi to 15 bpm at 200 psi. Throughout this operation, the SFO helix, cavitation, and acoustic pulse (alike) jetting proved to be more effective than other single acting rotating jetting tools. Also, Environmental impact was reduced by eliminating the need for a rig workover operation. The matching of the injection pressure when the well was first completed and the post job value indicated that the complete zone was exposed and scale deposits were removed from the critical matrix or bypassed. SFO has an effective jetting near wellbore region, while the kinetic energy transferred via fluid makes the impact stronger in the deeper region. Internal mechanism of the tool allows it to handle high pumping rate and pressures, external finishing offer multi-port orientation of outflow that allows targeting the fill in desired directions. Presently the SFO used in the case study is the only technology that has pulse, cavitation, and helix jetting structure. Also, since the tool does not require redressing, it proves to be an efficient, safe and cost effective alternative

Reinforcement Learning From Pixels: Waterflooding Optimization

2020 ◽  
Author(s):  
Ruslan Miftakhov ◽  
Igor Efremov ◽  
Abdulaziz S. Al-Qasim
Keyword(s):  
Reinforcement Learning ◽  
Net Present Value ◽  
Vertical Section ◽  
Water Injection ◽  
Petroleum Industry ◽  
Injection Pressure ◽  
Injection Rate ◽  
Simulation Engine ◽  
First Case ◽  
The Impact

Abstract The application of Artificial Intelligence (AI) methods in the petroleum industry gain traction in recent years. In this paper, Deep Reinforcement Learning (RL) is used to maximize the Net Present Value (NPV) of waterflooding by changing the water injection rate. This research is the first step towards showing that the use of pixel information for reinforcement learning provides many advantages, such as a fundamental understanding of reservoir physics by controlling changes in pressure and saturation without directly accounting for the reservoir petrophysical properties and wells. The optimization routine based on RL by pixel data is tested on the 2D model, which is a vertical section of the SPE 10 model. It has been shown that RL can optimize waterflooding in a 2D compressible reservoir with the 2-phase flow (oil-water). The proposed optimization method is an iterative process. In the first few thousands of updates, NPV remains in the baseline since it takes more time to converge from raw pixel data than to use classical well production/injection rate information. RL optimization resulted in improving the NPV by 15 percent, where the optimum scenario shows less watercut values and more stable production in contrast to baseline optimization. Additionally, we evaluated the impact of selecting the different action set for optimization and examined two cases where water injection well can change injection pressure with a step of 200 psi and 600 psi. The results show that in the second case, RL optimization is exploiting the limitation of the reservoir simulation engine and tries to imitate a cycled injection regime, which results in a 7% higher NPV than the first case.

Development of Small Field in Malaysia Using Cost-Effective Open Hole Sandface Completion Technologies - A Case Study

2011 ◽  
Author(s):  
Norhisham Safiin ◽  
Abdo Ahmad ◽  
Nik Zarina Suryana Nik Khansani ◽  
Norlin Muhammad Ghazali ◽  
Osman Zainal Abidin ◽  
...  
Keyword(s):  
Cost Effective ◽  
Small Field ◽  
Open Hole

Affordable education with a little help from the library

2020 ◽  
Vol 48 (3) ◽  
pp. 457-471
Author(s):  
Diane Sotak ◽  
Jane G. Scott ◽  
Tillia R. Griffin
Keyword(s):  
Low Income ◽  
Cost Effective ◽  
Private University ◽  
Pilot Project ◽  
Library Services ◽  
Content Type ◽  
Course Materials ◽  
Low Income College Students ◽  
The Impact

Purpose The purpose of this paper is to describe the design, creation and outcome of a pilot project to provide additional course reserve materials to students. The goals of the project include off-setting the rising costs of higher education and providing equitable access to materials. Design/methodology/approach This case study describes the process of library staff co-creating a workflow to efficiently identify, order and process print and electronic books for 100 and 200 level courses at a small, private university. The project was influenced by an exploration of library services in the context of library ethics. The authors evaluate the impact of the project and determine continued need after a two-year pilot. Findings This paper demonstrates the usefulness of the course reserves service in providing accessible and cost-effective resources. Increased usage of course reserve materials by students, along with a reduction in money spent over time by the library to support the service, has resulted in a program that is deemed viable to continue and potentially expand. Social implications This paper seeks to address the added challenges often placed on low-income college students in accessing, paying for and using assigned course materials. Libraries can use course reserves to enhance student success by providing them with an alternate to purchasing course materials. Originality/value The project addresses constraints of cost, staff time and cross-departmental workflows in managing a course reserves program at a small university and provides a template for other libraries to use.

scholarly journals Improving Business Performance by Employing Virtualization Technology: A Case Study in the Financial Sector

Computers ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 52
Author(s):  
Georgios Lambropoulos ◽  
Sarandis Mitropoulos ◽  
Christos Douligeris
Keyword(s):  
Business Performance ◽  
Financial Institution ◽  
Cost Effective ◽  
Service Level ◽  
It Services ◽  
Efficient Manner ◽  
It Departments ◽  
The Impact ◽  
Modern Technologies

The financial crisis of the last decade has left many financial institutions with limited personnel and equipment resources. Thus, the IT departments of these institutions are being asked to explore novel approaches to resolve these constraints in a cost-effective and efficient manner. The goal of this paper is to measure the impact of modern enabling technologies, such as virtualization, in the process of replacing legacy infrastructures. This paper proposes an IT services upgrade plan approach for an organization by using modern technologies. For this purpose, research took place in an operating financial institution, which required a significant upgrade of both its service-level and its hardware infrastructure. A virtualization implementation and deployment assessment for the entire infrastructure was conducted and the resulting consolidated data are presented and analysed. The paper concludes with a five-year financial-based evaluation of the proposed approach with respect to the projection of expenditures, the return of investment and profitability.

scholarly journals Implementing Interventions with Varying Marginal Cost-Effectiveness: An Application in Precision Medicine

2020 ◽  
Vol 40 (7) ◽  
pp. 924-938
Author(s):  
Stuart J. Wright ◽  
Mike Paulden ◽  
Katherine Payne
Keyword(s):  
Cost Effectiveness ◽  
Precision Medicine ◽  
Implementation Strategies ◽  
Recurrence Score ◽  
Cost Effective ◽  
Decision Analytic Model ◽  
Costs And Benefits ◽  
Marginal Costs ◽  
The Impact

Purpose. A range of barriers may constrain the effective implementation of strategies to deliver precision medicine. If the marginal costs and consequences of precision medicine vary at different levels of implementation, then such variation will have an impact on relative cost-effectiveness. This study aimed to illustrate the importance and quantify the impact of varying marginal costs and benefits on the value of implementation for a case study in precision medicine. Methods. An existing method to calculate the value of implementation was adapted to allow marginal costs and consequences of introducing precision medicine into practice to vary across differing levels of implementation. This illustrative analysis used a case study based on a published decision-analytic model-based cost-effectiveness analysis of a 70-gene recurrence score (MammaPrint) for breast cancer. The impact of allowing for varying costs and benefits for the value of the precision medicine and of implementation strategies was illustrated graphically and numerically in both static and dynamic forms. Results. The increasing returns to scale exhibited by introducing this specific example of precision medicine mean that a minimum level of implementation (51%) is required for using the 70-gene recurrence score to be cost-effective at a defined threshold of €20,000 per quality-adjusted life year. The observed variation in net monetary benefit implies that the value of implementation strategies was dependent on the initial and ending levels of implementation in addition to the magnitude of the increase in patients receiving the 70-gene recurrence score. In dynamic models, incremental losses caused by low implementation accrue over time unless implementation is improved. Conclusions. Poor implementation of approaches to deliver precision medicine, identified to be cost-effective using decision-analytic model-based cost-effectiveness analysis, can have a significant economic impact on health systems. Developing and evaluating the economic impact of strategies to improve the implementation of precision medicine will potentially realize the more cost-effective use of health care budgets.

SUSTAINABLE IMPACT OF BUILDING ENERGY RETROFIT MEASURES

2017 ◽  
Vol 12 (3) ◽  
pp. 69-84 ◽  
Author(s):  
Amirhosein Jafari ◽  
Vanessa Valentin
Keyword(s):  
Social Impact ◽  
Cost Effective ◽  
Building Energy ◽  
Economic Benefits ◽  
Environmental Benefits ◽  
Energy Retrofit ◽  
Cost Effective Method ◽  
Impact Index ◽  
The Impact

Energy retrofitting is argued to be the most feasible and cost-effective method for improving existing buildings' energy efficiency. As a sustainable development, building energy retrofits require the consideration and integration of all three sustainability dimensions: environmental, economic and social. The objective of this study is to estimate and compare the sustainable impact of building energy retrofits to determine the maximum sustainable benefit when implementing different energy-related measures. The proposed analysis consists of integrating three approaches for evaluating these benefits. Economic benefits are measured by estimating the payback period of energy-related measures, environmental benefits are measured by estimating the CO2 equivalent saving per year due to the implementation of energy-related measures, and social benefits are measured by defining a “social impact index” that establishes the impact of energy-related measures on buildings' users. A case study is used to demonstrate the framework for four potential scenarios. The results show that for the case study, energy-related “controlling” and “upgrading mechanical system” measures have the highest sustainable impact among the identified energy retrofitting measures.

Making Workovers Easy and Cost Effective: Turning Old Ways into New Opportunities

2021 ◽  
Author(s):  
Mustansar Raza ◽  
Hossam Elmoneim ◽  
Kris Looten ◽  
Omar Elzanaty ◽  
Ahmed Shakeel ◽  
...  
Keyword(s):  
Gas Flow ◽  
Short Interval ◽  
Cost Effective ◽  
No Production ◽  
Wellbore Integrity ◽  
Open Hole ◽  
Gel Composition ◽  
Cement Plug ◽  
Placement Technique

Abstract A case study and methodology is presented to shed the light on the different processes followed during the placement of a non-damaging isolation barrier in a group of highly naturally-fractured and vugular gas wells. The temporary isolation aims at isolating the wellbore from the troublesome formation and allow the removal of the original completion string and install a new redesigned one. The process helped putting the wells back on production with-out the need to stimulate any of them. This helped client to reduce the overall workover cost by 40% and proved to be successful and efficient to complete the required operation in a time-efficient. The operator had 4 wells with OH sections ranging from 40-80m which were completed in the late 1990's with no production packer. To preserve wellbore integrity the completion string needed to be pulled and replaced by a string with production packer and DH gauges. Visco-Elastic Surfactant (VES) and calcium CaCO3 (carbonate) used ubiquitously in field operations were tested for optimal design to fill highly fractured OH without damaging formation. Caliper logs were not available, and the presence of natural fractures posed a challenge to calculate the actual OH volume. A system was developed to carry the CaCO3 into the wellbore in stages and slickline was employed to measure fill after each stage. Once the OH was filled with CaCO3 and well would support a fluid column coil tubing was used to place an acid-soluble cement plug in the short interval between casing shoe and end of tubing (6-9m). The paper describes the optimization process followed to tune the CaCO3 pads composition, gel composition, mixing and placement technique. The first well in the campaign required more than 10 times the theoretical volume of CaCO3 to fill the open hole with multiple settling issues at surface. It was concluded the surfactant gel was likely carrying the CaCO3 into the fractures. The procedure was modified to tie in a line of breaker solution to the well head allowing sufficient viscosity of the fluid to carry the CaCO3 from surface but immediately lose viscosity and allow the CaCO3 to settle in the open hole without being carried into the formation. Specific coil tubing procedures were employed to allow the setting of ultra-short acid soluble cement plugs (<6m). All wells were successfully isolated to allow the safe workover of the completion string and returned to production with no loss of gas flow, with-out the need to stimulate after the work over. The campaign exhibited a new method of employing existing technologies to achieve the objective in a highly challenging and relatively new oilfield of Kurdistan. The campaign also demonstrated the benefit, in terms of saving time and cost because of extensive pre-execution planning.

scholarly journals Resilience-Based Recovery Assessments of Networked Infrastructure Systems under Localized Attacks

2019 ◽  
Vol 4 (1) ◽  
pp. 11 ◽  
Author(s):  
Tanzina Afrin ◽  
Nita Yodo
Keyword(s):  
Water Distribution ◽  
Water Distribution Network ◽  
Cost Effective ◽  
Recovery Strategy ◽  
Infrastructure Systems ◽  
Study Results ◽  
Lattice Network ◽  
Recovery Assessment ◽  
The Impact

To reduce unforeseen disaster risks, infrastructure systems are expected to be resilient. The impact of many natural disasters on networked infrastructures is often observed to follow a localized attack pattern. The localized attack can be demonstrated by the failures of a group of links concentrated in a particular geographical domain which result in adjacent isolated nodes. In this paper, a resilience-based recovery assessment framework is proposed. The framework aims to find the most effective recovery strategy when subjected to localized attacks. The proposed framework was implemented in a lattice network structure inspired by a water distribution network case study. Three different recovery strategies were studied with cost and time constraints incorporated: preferential recovery based on nodal weight (PRNW), periphery recovery (PR), and localized recovery (LR). The case study results indicated that LR could be selected as the most resilient and cost-effective recovery strategy. This paper hopes to aid in the decision-making process by providing a strategic baseline for finding an optimized recovery strategy for localized attack scenarios.

scholarly journals Time Integrated Flux Analysis: Exploiting the Concentration Measurements Directly for Cost-Effective Metabolic Network Flux Analysis

2019 ◽  
Vol 7 (12) ◽  
pp. 620 ◽  
Author(s):  
Portela ◽  
Richelle ◽  
Dumas ◽  
von Stosch
Keyword(s):  
Metabolic Flux ◽  
Cost Effective ◽  
Flux Analysis ◽  
Concentration Data ◽  
Practical Applications ◽  
Variability Analysis ◽  
Flux Balance ◽  
Balance Analysis ◽  
The Impact

Background: Flux analyses, such as Metabolic Flux Analysis (MFA), Flux Balance Analysis (FBA), Flux Variability Analysis (FVA) or similar methods, can provide insights into the cellular metabolism, especially in combination with experimental data. The most common integration of extracellular concentration data requires the estimation of the specific fluxes (/rates) from the measured concentrations. This is a time-consuming, mathematically ill-conditioned inverse problem, raising high requirements for the quality and quantity of data. Method: In this contribution, a time integrated flux analysis approach is proposed which avoids the error-prone estimation of specific flux values. The approach is adopted for a Metabolic time integrated Flux Analysis and (sparse) time integrated Flux Balance/Variability Analysis. The proposed approach is applied to three case studies: (1) a simulated bioprocess case studying the impact of the number of samples (experimental points) and measurements’ noise on the performance; (2) a simulation case to understand the impact of network redundancies and reaction irreversibility; and (3) an experimental bioprocess case study, showing its relevance for practical applications. Results: It is observed that this method can successfully estimate the time integrated flux values, even with relatively low numbers of samples and significant noise levels. In addition, the method allows the integration of additional constraints (e.g., bounds on the estimated concentrations) and since it eliminates the need for estimating fluxes from measured concentrations, it significantly reduces the workload while providing about the same level of insight into the metabolism as classic flux analysis methods.

scholarly journals EXPERIMENTAL STUDY ON THE INJECTION CHARACTERISTICS OF HYDROTREATED VEGETABLE OIL IN A DIESEL ENGINE COMMON RAIL SYSTEM

2022 ◽  
Vol 36 (06) ◽  
Author(s):  
VO TAN CHAU ◽  
DUONG HOANG LONG ◽  
CHINDA CHAROENPHONPHANICH
Keyword(s):  
Vegetable Oil ◽  
Fuel Injection ◽  
Injection Pressure ◽  
Injection Rate ◽  
Common Rail System ◽  
Nox Formation ◽  
Injection Process ◽  
Rate Profile ◽  
The Impact ◽  
Injection Pressures

The diesel combustion is primarily controlled by the fuel injection process. The start of injection therefore has a significant effect in the engine, which relates large amount of injected fuel at the beginning of injection to produces a strong burst of combustion with a high local temperature and high NOx formation. This paper investigated the impact of Hydrotreated Vegetable Oil (HVO) and blends of 10%, 20%, 30%, 50%, 80% by mass of HVO with commercial diesel fuel (mixed 7% FAME-B7) to injection process under the Zeuch’s method and compared to that of B7. The focus was on the injection flow rate in the variation of injection pressures, back pressures, and energizing times. The experimental results indicated that injection delay was inversely correlated to HVO fraction in the blend as well as injection pressure. At different injection pressures, HVO revealed a slightly lower injection rate than diesel that resulted in smaller injection quantity. Discharge coefficient was recognized larger with HVO and its blends. At 0.5ms of energizing time, injection rate profile displayed the incompletely opening of needle. Insignificant difference in injection rate was observed as increasing of back pressure.

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