Operational efficiency improvement by using logging while drilling (LWD) fluid sampling and pressure-testing device

2014 ◽  
Vol 54 (2) ◽  
pp. 543
Author(s):  
Steve J Martin ◽  
Pei-Chea Tran ◽  
Steven Marshall
Keyword(s):  
Risk Mitigation ◽  
Sample Volume ◽  
Asia Pacific ◽  
Testing Device ◽  
Major Step ◽  
Chemical Absorption ◽  
Pressure Testing ◽  
Chemical Content ◽  
Hydrocarbon Gas ◽  
Fluid Sampling

Abstract An operator in Asia Pacific required a large sample volume from a gas reservoir for accurate non-hydrocarbon gas (NHCG) content analysis from two extended reach wells. This extended abstract highlights the use of an LWD fluid sampling and formation pressure-testing device to overcome numerous challenges, including a highly deviated wellbore, stuck pipe, oil-based mud (OBM) gas-sampling issues, and prevention of geo-chemical absorption. Application The choice to use an LWD fluid sampler was based on several factors that reduced significant risks. Due to the well’s deviated nature, the only traditional wireline fluid sampling solution would have required a pipe-conveyed logging mechanism. This would have added rig days to the project and increased the risk of stuck pipe. To prevent geo-chemical absorption, the storage tanks were manufactured with a specialised metallurgic design. This would be tested by applying a customer-requested coating to half the tanks and monitor differences in geo-chemical content. To prevent differential sticking, testing sequences would be limited to 90-minute intervals. Results, observations, and conclusions After two runs in separate wells, a total of 25 samples were acquired containing more than 19 litres of fluid. Due to the reduced invasion profile as a result of LWD technology, fluid stability was reached within the 90-minute threshold. Furthermore, results showed only 8% OBM contamination—half the amount seen in offsets from wireline produced fluid samples. Finally, due to the improved operation efficiency and the quality of the samples, the customer estimates that it saved nearly $10 million in rig costs and millions more in reduced retrofitting costs of the production facility. Significance of subject matter This extended abstract highlights a major step-change in fluid sampling technology. Operators no longer need to consider a well’s deviation in the ability to collect fluid samples. The recap of the two wells will offer additional best practices and risk mitigation techniques for future LWD sampling projects. It also adds yet another LWD technology that provides consistent wireline equivalent data.

Understanding and managing the threat of disruptive events to the critical national infrastructure

2014 ◽  
Vol 12 (3) ◽  
pp. 231-246 ◽  
Author(s):  
Robert Thurlby ◽  
Kim Warren
Keyword(s):  
System Dynamics ◽  
Policy Development ◽  
Risk Mitigation ◽  
Specific Situation ◽  
Investment Planning ◽  
Major Step ◽  
Content Type ◽  
Operational Conditions ◽  
Simulation Tools ◽  
National Infrastructure

Purpose – This paper aims to describe a high-level model portraying the relationships between operational, investment, commercial and regulatory pressures, and reports the early findings from testing alternative strategies, both over the long- and short-term. Concern about the vulnerability of utility networks (electricity, gas and water) and other infrastructures, including transport and telecommunications, to environmental, terrorist and other threats has increased in recent years. This has been motivated both by a perceived increase in such threats and by recognition that the commercial pressures and regulation of companies operating these infrastructures could unintentionally have increased that risk. Powerful simulation tools already help utility operators develop asset investment polices to improve both the performance and resilience of their networks, while others have helped increase their capability to respond efficiently when disruptive events occur. However, these tools need to be further developed to increase understanding of how the interdependencies between operational, investment, commercial and regulatory pressures influence and eventually define the strategic policies available to these organisations and what the long-run consequences will be for the resilience of these systems and hence for service continuity. Design/methodology/approach – Use of system dynamics methods and tools to develop a new approach to strategy and policy development for risk management for organisations operating the critical national infrastructure. Findings – System dynamics is a valid approach to address the problem of understanding risk and developing risk mitigation and management strategies for organisations operating the critical national infrastructure. To develop policies that will effectively manage and mitigate risk in the critical national infrastructure, it is essential to identify and model the interactions and interdependencies between the organisational, investment, commercial and regulatory factors. Research limitations/implications – The research has developed a proof-of-concept model and set of simulation tools which produce good results using test data from one type of organisation operating in the critical national infrastructure. The model has not been tested using data from other types of organisations. Similarly, the software written in the model has not been tested in operational conditions and further testing will be required. Practical implications – The model at the moment can only be applied to single organisation. The interactions between organisations are not in scope. Originality/value – Although some work in the field using simulation tools and methods has been done in the USA, the use of system dynamics and its application to the specific situation on the UK and Europe is new. The model uses earlier work which applied system dynamics to the subject of asset investment planning, but is a major step forward from this work. Risk and resilience is one of the major challenges facing operators of the critical national structure. This work will be of potential value to all these organisations.

Workplace violence prevention standardization using lean principles across a healthcare network

2018 ◽  
Vol 31 (6) ◽  
pp. 464-473 ◽  
Author(s):  
Scott A. Hutton ◽  
Kelly Vance ◽  
Jesse Burgard ◽  
Susan Grace ◽  
Lynn Van Male
Keyword(s):  
Violence Prevention ◽  
Process Improvement ◽  
Workplace Violence ◽  
Risk Mitigation ◽  
Threat Assessment ◽  
Veterans Health ◽  
Health Administration ◽  
Major Step ◽  
Content Type ◽  
Lean Principles

Purpose The purpose of this paper is to describe the process used to standardize a Workplace Violence Prevention Program (WVPP) within a five-hospital healthcare system in Veterans Health Administration (VHA). Design/methodology/approach A description of the lean process improvement principles, used to bring the WVPP into compliance with Occupational Safety and Health Administration (OSHA) and other agencies through streamlining/standardizing processes. Findings There was significant standardization in both the threat assessment and education arms of the WVPP. Compliance with all major US Department of Labor OSHA requirements, as well as substantial time savings, were realized as part of this process improvement. Originality/value VHA is leading the way in inter/multidisciplinary assessment and mitigation of workplace violence, however, there are significant competing demands on staff time. This first ever use of lean principles to streamline processes around workplace violence prevention freed up clinician time for care while improving internal and external customer satisfaction, representing a major step forward in workplace violence risk mitigation.

A PRACTICAL GUIDE TO EFFECTIVE DEEP-WATER FLUID SAMPLING WHILE DRILLING

2021 ◽  
Author(s):  
Matt Wandstrat ◽  
◽  
Gerard Simms ◽  
Femi Adegbola ◽  
Steve Smith ◽  
...  
Keyword(s):  
Deep Water ◽  
Risk Mitigation ◽  
Water Environment ◽  
Quality Data ◽  
Strategic Commitment ◽  
Water Wells ◽  
Practical Guidelines ◽  
Fluid Sampling

The objective of this paper is to provide a context for strategic use of fluid sampling while drilling (FSWD) in the deep-water environment. Our work is based on data collected from Gulf of Mexico wells over the last 7 years and we incorporate both operator and service company experience. In this paper we review the current FSWD technology and the quality of the fluid samples. We provide practical guidelines for executing the FSWD operation and review types of wells where FSWD has been most effective. We also discuss the role FSWD plays in the business of efficient well construction (drilling, evaluating, and completing). Strategic use of FSWD can provide time savings and operational risk mitigation. FSWD has proven to provide high quality data and fluid samples, however, an awareness of the differences between conventional fluid sampling (wireline) and sampling while-drilling is important for maximizing benefits. Additionally, long term strategic commitment to FSWD is likely to provide the largest benefits to operators. FSWD has been around for about 10 years, but how, and where, to apply the technology has not been clear to many operators. The broader industry can benefit by learning from experiences accumulated through consistent and extensive FSWD use in deep-water wells showing how the technology has progressed, and how it is used to achieve business benefits.

Lessons Learnt from a Successful Sampling While Drilling Campaign Delivering Formation Oil Samples and Saturation Pressure Measurements in High H2S Carbonates

2021 ◽  
Author(s):  
Khalid Javid ◽  
Guido Carlos Bascialla ◽  
Alvaro Sainz Torre ◽  
Hamad Rashed Al Shehhi ◽  
Viraj Nitin Telang ◽  
...  
Keyword(s):  
Saturation Pressure ◽  
Carbonate Reservoir ◽  
Closed Chamber ◽  
Well Control ◽  
Pilot Hole ◽  
Fluid Identification ◽  
Pressure Testing ◽  
Lessons Learnt ◽  
Fluid Sampling ◽  
Complex Well

Abstract As island development strategies gain focus for capitalizing deep offshore assets, limitations like fixed slot location bring about the need for drilling extended reach (ERD) wells with multiple drain holes and complex well geometry to maximize the reservoir coverage for increased production. Pressure testing and reservoir fluid sampling operations require long stationary time and pose a risk of differential sticking. Deploying a pressure testing and fluid sampling tool into the drilling bottom-hole assembly (BHA) helps in maintaining well control through continuous circulation and providing measures to retrieve the tool by rotation and jarring in case of pipe sticking. This paper presents the successful deployment of sampling while drilling tools in three ERD wells drilled using water based and oil based muds to acquire representative formation oil samples from a high H2S carbonate reservoir. The formation oil samples were collected immediately after drilling the well to the target depth for limiting the invasion to collect clean samples in shorter pump-out volume and time. After securing the samples, a phase separation test was performed by fluid expansion in a closed chamber to measure the saturation pressure of the oil. A 30-min long pressure build up was also performed for pressure transient analysis to estimate permeability. Formation fluid samples were collected, while pulling out the drilling BHA, within 12-48 hours of drilling the well by pumping out 100-170 liters of fluid from the formation in 4-6 hours. During clean up, absorbance spectroscopy identifies the fluid phases – gas, oil and water. Prominent trends observed in compressibility, mobility, sound slowness and refractive index measurements add confidence to the fluid identification and provide accurate contamination measurements. Single-phase tanks charged with nitrogen were used to assure quality samples for PVT analysis. The sample tanks are made of MP35N alloy and the flow lines are made of titanium that are both H2S resistant and non-scavenging materials and hence, a separate coat of non-scavenging material was not required. In highly deviated wells, sampling while drilling technology can close the gaps of the conventional wireline operation on pipe conveyed logging in addition to saving 5-days of rig time by eliminating the need for conditioning trips, a dedicated run for pressure testing and sampling and minimizing the risk of stuck pipe and well control incidents The results from downhole fluid analysis and PVT lab are compared in this paper. Going forward, this technology can eliminate the requirement of a pilot hole for pressure testing & sampling by enabling sampling in complex well geometries in landing sections and ERD wells. The paper concludes with discussions on suggested improvements in the tool design and capability and recommendations on best practices to align with the lessons learnt in this sampling while drilling campaign.

Riser gas risk mitigation with advanced flow detection and managed pressure drilling technologies in deepwater operations in Australia

2014 ◽  
Vol 54 (1) ◽  
pp. 23
Author(s):  
Julmar Shaun Sadicon Toralde ◽  
Chad Henry Wuest ◽  
Robert DeGasperis
Keyword(s):  
Risk Mitigation ◽  
Control Device ◽  
Asia Pacific ◽  
Well Control ◽  
Alternative Approach ◽  
Managed Pressure Drilling ◽  
Drilling Operations ◽  
Drilling System ◽  
Flow Detection ◽  
And Control

The threat of riser gas in deepwater drilling operations is real. Studies show that gas kicks unintentionally entrained in oil-based mud in deepwater are unlikely to break out of solution until they are above the subsea blowout preventers (BOPs). The rig diverter is conventionally used to vent riser gas with minimal control and considerable risk and environmental impact involved. Reactive riser gas systems provide a riser gas handling (RGH) joint that is composed of a retrofitted annular BOP and a flow spool with hoses installed on top of the rig marine riser. A proactive, alternative approach to riser gas handling, called riser gas risk mitigation, is proposed by using managed pressure drilling (MPD) equipment. MPD involves the use of a rotating control device (RCD) to create a closed and pressurisable drilling system where flow out of the well is diverted to an automated MPD choke manifold with a high-resolution mass flow meter that increases the sensitivity and reaction time of the system to kicks, losses and other unwanted drilling events. Experiments and field deployments have shown that the deepwater MPD system can detect a gas influx before it dissolves in oil-based mud, allowing for management of the same using conventional well control methods. Since the MPD system has already closed the well in, automatic diversion and control of gas in the riser is also possible, if required. This paper presents experience gained from deepwater MPD operations in the Asia-Pacific to illustrate this, and possible deployment options in Australia are discussed.

scholarly journals A review of diving practices and outcomes following the diagnosis of a persistent (patent) foramen ovale in compressed air divers with a documented episode of decompression sickness

2020 ◽  
Vol 50 (4) ◽  
pp. 363-369
Author(s):  
Christopher W Scarff ◽  
◽  
John Lippmann ◽  
Andrew W Fock ◽  
◽  
...  
Keyword(s):  
Patent Foramen Ovale ◽  
Decompression Sickness ◽  
Risk Mitigation ◽  
Position Statement ◽  
Compressed Air ◽  
Asia Pacific ◽  
Foramen Ovale ◽  
Post Intervention ◽  
History Of ◽  
Almost All

(Scarff CW, Lippmann J, Fock AW. A review of diving practices and outcomes following the diagnosis of a persistent (patent) foramen ovale in compressed air divers with a documented episode of decompression sickness. Diving and Hyperbaric Medicine. 2020 December 20;50(4):363–369. doi: 10.28920/dhm50.4.363-369. PMID: 33325017.) Introduction: The presence of a persistent (patent) foramen ovale (PFO) increases the risk of decompression sickness (DCS) whilst diving with pressurised air. After the diagnosis of a PFO, divers will be offered a number of options for risk mitigation. The aim of this study was to review the management choices and modifications to diving practices following PFO diagnosis in the era preceding the 2015 joint position statement (JPS) on PFO and diving. Methods: A retrospective study was conducted of divers sourced from both the Alfred Hospital, Melbourne and the Divers Alert Network Asia-Pacific during the period 2005–2015. Divers were contacted via a combination of phone, text, mail and email. Data collected included: diving habits (years, style and depths); DCS symptoms, signs and treatment; return to diving and modifications of dive practices; history of migraine and echocardiography (ECHO) pre- and post-intervention; ECHO technique(s) used, and success or failure of PFO closure (PFOC). Analyses were performed to compare the incidence of DCS pre- and post-PFO diagnosis. Results: Seventy-three divers were interviewed. Sixty-eight of these returned to diving following the diagnosis of PFO. Thirty-eight underwent PFOC and chose to adopt conservative diving practices (CDPs); 15 chose PFOC with no modification to practices; 15 adopted CDPs alone; and five have discontinued diving. The incidence of DCS decreased significantly following PFOC and/or adoption of conservative diving practices. Of interest, migraine with aura resolved in almost all those who underwent PFOC. Conclusions: Many divers had already adopted practices consistent with the 2015 JPS permitting the resumption of scuba diving with a lowering of the incidence of DCS to that of the general diving population. These results support the recommendations of the JPS.

scholarly journals A Review on the Development of Earthquake Warning System Using Low-Cost Sensors in Taiwan

Sensors ◽  
2021 ◽  
Vol 21 (22) ◽  
pp. 7649
Author(s):  
Yih-Min Wu ◽  
Himanshu Mittal
Keyword(s):  
Risk Mitigation ◽  
Low Cost ◽  
Warning System ◽  
Micro Electro Mechanical System ◽  
Disaster Mitigation ◽  
Asia Pacific ◽  
Peak Ground Velocity ◽  
Rupture Directivity ◽  
Alert System ◽  
Ground Acceleration

Seismic instrumentation for earthquake early warnings (EEWs) has improved significantly in the last few years, considering the station coverage, data quality, and the related applications. The official EEW system in Taiwan is operated by the Central Weather Bureau (CWB) and is responsible for issuing the regional warning for moderate-to-large earthquakes occurring in and around Taiwan. The low-cost micro-electro-mechanical system (MEMS)-based P-Alert EEW system is operational in Taiwan for on-site warnings and for producing shakemaps. Since 2010, this P-Alert system, installed by the National Taiwan University (NTU), has shown its importance during various earthquakes that caused damage in Taiwan. Although the system is capable of acting as a regional as well as an on-site warning system, it is particularly useful for on-site warning. Using real-time seismic signals, each P-Alert system can provide a 2–8 s-long warning time for the locations situated in the blind zone of the CWB regional warning system. The shakemaps plotted using this instrumentation help to assess the damage pattern and rupture directivity, a key feature in the risk mitigation process. These shakemaps are delivered to the intended users, including the disaster mitigation authorities, for possible relief purposes. Earlier, the network provided only peak ground acceleration (PGA) shakemaps, but has now been updated to include peak ground velocity (PGV), spectral acceleration (Sa) at different periods, and CWB intensity maps. The PGA and PGV shakemaps plotted using this network have proven helpful in establishing the fact that PGV is a better indicator of damage detection than PGA. This instrumentation is also useful in structural health-monitoring and estimating co-seismic deformations. Encouraged by the performance of the P-Alert network, more instruments are installed in Asia-Pacific countries.

Design of Coal mining Roof Pressure Monitoring System Based on Labview

2014 ◽  
Vol 488-489 ◽  
pp. 1019-1022 ◽  
Author(s):  
Da Hu Wang ◽  
Yan Nan Shi ◽  
Wen Bo Chen
Keyword(s):  
Data Acquisition ◽  
Coal Mining ◽  
Monitoring System ◽  
Processing System ◽  
Testing Device ◽  
Pressure Data ◽  
Pressure Monitoring ◽  
Infrared Communication ◽  
Pressure Testing ◽  
Computer Monitoring

In order to monitor the press of mining roof in combined face, the paper design a coal mining roof pressure monitoring system. The system includes roof pressure testing device, intelligent portable data acquisition meter and upper lever computer monitoring and processing system. Roof pressure testing device is mainly testing the pressure of mining roof and transmitting pressure data to intelligent portable data acquisition meter by infrared communication technology within the allotted time. Intelligent portable data acquisition meter can also transmit pressure data to upper lever computer monitoring and processing system for further analysis and storage. Test results indicate that the system can achieve long-term continuous monitoring to roof pressure and provide the reference frame about roof control through the analysis of the monitoring results.

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