First Application Micro Coiled Tubing in Indonesia at Offshore Mahakam

2021 ◽  
Author(s):  
R. Marindha
Keyword(s):  
Cost Savings ◽  
Time Frame ◽  
Micro Ct ◽  
Safety Issues ◽  
Coiled Tubing ◽  
Upper Deck ◽  
Start Up ◽  
Ct System ◽  
Set Up ◽  
Conventional Ct

With a view to addressing the challenges of future offshore platform evolution, smaller footprint of coiled tubing set is required for pumping work in minimalist platform. Although coiled tubing (CT) is the most efficient service method for multiple wellsite operations, it can be difficult to capture all the benefits of applying it to some offshore wells. Limited crane capacity and platform’s upper deck space often present challenges to efficiently execute CT operation. Minimalist and crowded platforms may not allow a perfect condition to properly set up conventional CT system. As part of the continuous improvement in Well Intervention, smaller size of CT called Micro CT is deployed to unload the completion fluid using nitrogen pumping. This is in order to provide sufficient drawdown prior to clean up or perforation works. Micro CT is a small coiled tubing with an outside diameter of 1” and a length of 10,000ft. It is 46% lighter and 39% smaller compared to conventional CT. The firtst Micro CT start-up project in Indonesia was initiated with unloading jobs in Bekapai and South Mahakam wells. There were five unloading jobs and they were successfully performed within the allocated time frame and budget. There were no major safety issues occurred. Total 60% cost savings can be generated from reduced supply boat mobilization trips prior to equipment mobilization while 40% cost savings came from efficiency in diesel consumption. From an operational aspect, less annular friction can be achieved and gives us 35% efficiency in N2 consumption. Moreover, it saves 10 – 20% rig up time in comparison to conventional CT. On top of that, those five unloading jobs were completed with an efficiency of more than 70%. In conjunction with this paper, we would like to share Micro Coiled Tubing experience where this was the first application in Indonesia with safety and measurable milestones.

First Application of Micro Coiled Tubing in Indonesia at Offshore Mahakam

2021 ◽  
Author(s):  
Rantoe Marindha ◽  
Pratika Siamsyah Kurniawati ◽  
Gerardus Pancawisna ◽  
Reyhan Hidayat ◽  
Gitani Tsalitsah Dahnil ◽  
...  
Keyword(s):  
Cost Saving ◽  
Time Frame ◽  
Micro Ct ◽  
Safety Issues ◽  
Coiled Tubing ◽  
Start Up ◽  
Future Challenges ◽  
Ct System ◽  
Set Up ◽  
Conventional Ct

Abstract In order to answer the future challenges associated with offshore logistics, minimalist platform and job simplicity, smaller footprint of coiled tubing set is required for pumping job. Although coiled tubing (CT) is one of the most efficient deployment method for multiple wellsite operations and various objectives. Often it is difficult to capture all the benefits of its application in some offshore wells. Limited crane capacity and deck space at the platform often provide challenges to efficiently execute a CT operation. Minimalist and crowded platforms may not allow conducive condition to set up a conventional CT system. As part of continuous improvement in Well Intervention, smaller size of CT called Micro CT is deployed to unload the completion fluid using nitrogen pumping. This is to provide sufficient drawdown prior to clean up or perforation jobs. Micro CT is a small coiled tubing typically with 1" outside diameter and 10,000 ft length. It is approximately half the weight and a third smaller compared to the conventional CT. The start-up project of 1st Micro CT job in Indonesia is commenced with unloading Job in Bekapai and South Mahakam wells. Five (5) unloading job are successfully performed within allocated time frame and budget. There were no major safety issues recorded. Total of 60% cost saving was generated from the reduced mobilization trips of supply boat while 40% cost saving is from improved diesel consumption efficiency. From operational aspect, less annular friction can be achieved and led save up to 35% in N2 consumption. Moreover, it saves10 – 20% rig up time in comparison to conventional CT. On top of that, those 5 unloading jobs was completed with liquid unloading efficiency of more than 70% from the target. This paper will elaborate the experience of an Asset Operator in deploying 1st Micro CT application safely and will discuss in detail some of the measurable milestone achievement from the project.

Assessment of image quality parameters of a novel micro-CT system compared to a conventional CT geometry

2018 ◽  
Author(s):  
Nazila Saeidnezhad ◽  
Kunal Kumar ◽  
Bernhard H. Müller ◽  
Christoph Hoeschen ◽  
Oleg Tischenko
Keyword(s):  
Image Quality ◽  
Quality Parameters ◽  
Micro Ct ◽  
Ct System ◽  
Conventional Ct

scholarly journals Simple low dose radiography allows precise lung volume assessment in mice

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Amara Khan ◽  
Andrea Markus ◽  
Thomas Rittmann ◽  
Jonas Albers ◽  
Frauke Alves ◽  
...  
Keyword(s):  
Lung Function ◽  
Whole Body ◽  
Acquisition Time ◽  
Micro Ct ◽  
Lung Volumes ◽  
X Ray ◽  
Promising Tool ◽  
Volume Assessment ◽  
Set Up ◽  
Time Required

AbstractX-ray based lung function (XLF) as a planar method uses dramatically less X-ray dose than computed tomography (CT) but so far lacked the ability to relate its parameters to pulmonary air volume. The purpose of this study was to calibrate the functional constituents of XLF that are biomedically decipherable and directly comparable to that of micro-CT and whole-body plethysmography (WBP). Here, we developed a unique set-up for simultaneous assessment of lung function and volume using XLF, micro-CT and WBP on healthy mice. Our results reveal a strong correlation of lung volumes obtained from radiographic XLF and micro-CT and demonstrate that XLF is superior to WBP in sensitivity and precision to assess lung volumes. Importantly, XLF measurement uses only a fraction of the radiation dose and acquisition time required for CT. Therefore, the redefined XLF approach is a promising tool for preclinical longitudinal studies with a substantial potential of clinical translation.

Microstructured Reactors for Gas Phase Reactions

2008 ◽  
Author(s):  
Steffen Schirrmeister
Keyword(s):  
Gas Phase ◽  
Flow Distribution ◽  
Pilot Scale ◽  
Gas Phase Reactions ◽  
Process Technology ◽  
Safety Issues ◽  
Catalyst Coating ◽  
Coating Flow ◽  
Set Up ◽  
Micro Technology

Pilot-scale micro-process technology for heterogeneously catalyzed gas phase reactions is generally highly demanding towards the methods of catalyst coating, flow distribution, reactor manufacturing and assembly, safety issues and other factors. Yet, first cost analysis have shown that economical processes can be developed using micro-technology. For this matter, it is necessary to improve and simplify the laboratory set-up, meaning that the stacked architectures at the meter-scale must be brought down to the micron-scale. This in return calls for specific methods of catalyst coating and a particularly precise assembly of the operation unit.

Field Determination of Fracture Propagation Mode Using Downhole Pressure Data

2015 ◽  
Author(s):  
Ali Daneshy ◽  
Chad Touchet ◽  
Fred Hoffman ◽  
Mike McKown
Keyword(s):  
Propagation Mode ◽  
Fluid Migration ◽  
Pressure Data ◽  
Isolation System ◽  
Fracture Orientation ◽  
Coiled Tubing ◽  
Treatment Data ◽  
Set Up ◽  
Adjacent Fractures ◽  
First Time

Abstract This paper presents the analysis results of 60 single stage fracturing treatments performed in a horizontal well using cemented casing sleeves and a coiled tubing deployed frac isolation system as the completion method. In this carefully set-up and executed treatment, separation between the toe stages was 97 feet, and near the heel it was 55 feet. Pressure data was collected above and below the retrievable plug used for stage isolation. This data was used for analysis of fracturing treatment data which included mode of propagation, completion efficiency, and a rough estimate of fracture orientation. The analysis showed that; There was no interaction between adjacent fractures during five of the sixty fracturing stages. None of these was in the well interval with shorter fracture spacingFracture shadowing occurred during six fracture stages, again none in the shorter spacing intervalMinor cement defects (micro-annuli) caused some fluid migration into the passive segment of the well. This happened in 27 stages. Of these; In eleven cases the cement defects were plugged after a while, causing the migration of fracturing fluid into the passive interval to stop.In sixteen other cases the fluid migration through cement micro-annuli continued during fracturing.During ten stages, defective zone isolation and fluid migration caused a pressure increase of several hundred psi in the passive segment of the well. But this did not result in extension of passive fractures.The volume of migrated slurry due to inadequate zone isolation was mostly a very small fraction of the injected volume.During five stages poor cement quality hampered stage isolation and caused immediate link between adjacent active and passive intervals and extension of passive fractures.The data indicate possible connection between the active and one passive fracture in four stages.Shorter spacing between stages increased the incidents of fluid migration due to poor cement qualityThe fracturing pressure variations during the treatments did not indicate presence of large stress shadowingA rough estimation of fracture orientation indicates that they were likely to be vertical and nearly perpendicular to the wellbore.The fracture growth pattern can best be described as off-balance. To our knowledge, this is the first time existence of direct communication between adjacent fractures has been observed through actual pressure interference data.

New Well Intervention Means as an Answer to Offshore Minimalist Platform Concept: A Breakthrough from Mahakam, Indonesia

2021 ◽  
Author(s):  
Risal Rahman ◽  
Reyhan Hidayat ◽  
Pratika Siamsyah Kurniawati ◽  
Rantoe Marindha ◽  
Gerardus Putra Pancawisna ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Cost Optimization ◽  
Oil And Gas Industry ◽  
Project Planning ◽  
Gas Industry ◽  
Safety Issues ◽  
Coiled Tubing ◽  
Remote Operation ◽  
Innovation And Technology ◽  
Hazardous Zone

Abstract Nowadays oil and gas industry are encouraging the independents and majors to take a fresh look at the technology and concepts required to develop marginal shallow water fields using a minimal platform approach. Innovation on well intervention means (lighter, smaller and less footprint) that fit for Offshore Minimalist Platform (OMP) is needed, including optimizing time and cost during well intervention activities in OMP. To achieve the objectives, well intervention innovation and technology are the main focuses. Intervention activities commonly done on campaign basis with several units (slickline, wireline, coiled tubing, testing) shall be integrated in a safe manner. The approach of integration shall signify these points:Identifying potential jobs in OMP to be done by well intervention methodsIdentifying necessary well intervention means and methods to support the jobs (combo unit, micro coil, hazardous zone redefinition, remote operation)Creating project planning and schedulingPerforming site visit and risk assessmentImplementation and operational executionEvaluation of overall project execution result The following results were obtained after the integration performed:No major safety issues during operationExemplary method and risk assessment for well intervention activities which can be applied for next campaignsTrials on well intervention new units and method (combo unit, micro coil, hazardous zone redefinition, remote operation), were safely performed with some optimization100% success ratio60% on supply boat arrangement35% efficiency in N2 consumption for CT operation45% efficiency in diesel consumption20% - 40% efficiency in Rig Up Time28% less in Job Cost compared to conventional unit These innovations are proven as reliable method to answer OMP challenges with main advantages on footprint and cost optimization. Through this paper, we would like to share lucrative well intervention breakthrough and innovation in OMP with measurable milestones.

Development of Reliable NARX Models of Gas Turbine Cold, Warm and Hot Start-Up

2017 ◽  
Author(s):  
Hilal Bahlawan ◽  
Mirko Morini ◽  
Michele Pinelli ◽  
Pier Ruggero Spina ◽  
Mauro Venturini
Keyword(s):  
Gas Turbine ◽  
Training Data ◽  
Series Data ◽  
Data Sets ◽  
Control Logic ◽  
Start Up ◽  
Hot Start ◽  
Narx Models ◽  
Set Up ◽  
Rapid Transients

This paper documents the set-up and validation of nonlinear autoregressive exogenous (NARX) models of a heavy-duty single-shaft gas turbine. The considered gas turbine is a General Electric PG 9351FA located in Italy. The data used for model training are time series data sets of several different maneuvers taken experimentally during the start-up procedure and refer to cold, warm and hot start-up. The trained NARX models are used to predict other experimental data sets and comparisons are made among the outputs of the models and the corresponding measured data. Therefore, this paper addresses the challenge of setting up robust and reliable NARX models, by means of a sound selection of training data sets and a sensitivity analysis on the number of neurons. Moreover, a new performance function for the training process is defined to weigh more the most rapid transients. The final aim of this paper is the set-up of a powerful, easy-to-build and very accurate simulation tool which can be used for both control logic tuning and gas turbine diagnostics, characterized by good generalization capability.

Evaluation of a Nontraditional Approach to Fund, Finance, and Manage Metropolitan Freeways

2017 ◽  
Vol 2670 (1) ◽  
pp. 33-41 ◽  
Author(s):  
Patrick DeCorla-Souza ◽  
Morteza Farajian
Keyword(s):  
Cost Savings ◽  
Time Frame ◽  
Assessment Method ◽  
Public Welfare ◽  
Maintenance Cost ◽  
The Public ◽  
Welfare Benefits ◽  
Financial Position ◽  
Evaluation Approach ◽  
Operations And Maintenance

The purpose of this paper is twofold: ( a) to present a nontraditional, performance outcome–based public–private partnership (PPP) approach to finance and fund freeway reconstruction that relies not just on generating new revenue but also on optimizing scope and costs to achieve financial viability and ( b) to demonstrate how the approach can be evaluated for a specific project with an innovative value for money (VfM) assessment method that considers financial parameters, risk elements, and social benefits. The paper assesses the potential effects of the approach for a hypothetical project on ( a) the public agency’s financial position and ( b) public welfare. For this assessment, the effects of the project itself are assessed first by comparing conventional delivery of the project with “no build,” assuming that the project can be conventionally delivered in the same time frame as the PPP. Next, the effects of project acceleration are assessed by analyzing the effects of delaying conventional project delivery because of the public agency’s fiscal constraints. Finally, the PPP approach is compared with conventional delivery using public financing. The evaluation approach demonstrates how current VfM analysis practice may be enhanced by ( a) including a quantitative assessment of public welfare benefits and ( b) considering “no build” operations and maintenance cost savings to assess the net effect on the financial position of the agency.

Rapid start-up of one-stage deammonification MBBR without addition of external inoculum

2016 ◽  
Vol 74 (11) ◽  
pp. 2541-2550 ◽  
Author(s):  
Linda Kanders ◽  
Daniel Ling ◽  
Emma Nehrenheim
Keyword(s):  
Wastewater Treatment Plants ◽  
Full Scale ◽  
Anammox Bacteria ◽  
Operational Mode ◽  
Bacterial Populations ◽  
Reject Water ◽  
One Stage ◽  
Start Up ◽  
Laboratory Reactor ◽  
Set Up

In recent years, the anammox process has emerged as a useful method for robust and efficient nitrogen removal in wastewater treatment plants (WWTPs). This paper evaluates a one-stage deammonification (nitritation and anammox) start-up using carrier material without using anammox inoculum. A continuous laboratory-scale process was followed by full-scale operation with reject water from the digesters at Bekkelaget WWTP in Oslo, Norway. A third laboratory reactor was run in operational mode to verify the suitability of reject water from thermophilic digestion for the deammonification process. The two start-ups presented were run with indigenous bacterial populations, intermittent aeration and dilution, to favour growth of the anammox bacterial branches. Evaluation was done by chemical and fluorescence in situ hybridization analyses. The results demonstrate that anammox culture can be set up in a one-stage process only using indigenous anammox bacteria and that a full-scale start-up process can be completed in less than 120 days.

scholarly journals Consolidating the interactive analysis and Grid infrastructure at DESY

2020 ◽  
Vol 245 ◽  
pp. 07003
Author(s):  
Christoph Beyer ◽  
Thomas Finnern ◽  
Martin Flemming ◽  
Andreas Gellrich ◽  
Thomas Hartmann ◽  
...  
Keyword(s):  
Lessons Learned ◽  
Tier 2 ◽  
Interactive Analysis ◽  
Batch Systems ◽  
Batch System ◽  
Start Up ◽  
High Responsiveness ◽  
Primary Focus ◽  
Set Up ◽  
National Analysis

Within WLCG, the DESY site in Hamburg is one of the largest Tier-2 sites with about 18500 CPU cores for Grid workloads. Additionally, about 8000 CPU cores are available for interactive user analyses in the National Analysis Factory [NAF]. After migrating these two batch systems onto a common HTCondor based set-up during the previous four years, we recapitulate the lessons learned during the transition especially since both use cases differ in their workloads. For Grid jobs start-up latencies are negligible and the primary focus is on an optimal utilization of the resources. Complementary, users of the NAF expect a high responsiveness of the batch system as well as the storage for interactive analyses. In this document, we will also give an outlook to future developments and concepts for the DESY high-throughput computing. In the ongoing evolution of the HTC batch system, we are exploring how to integrate anonymous jobs with the batch system as back-end for Function-as-a-Service workflows as well as an option for dynamic expansions to remote computing resources.

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