The Experimental Study and Real Time Forcast-Control Method of the Severe Slug Flow in Offshore Production Riser

2008 ◽  
Author(s):  
Qingping Li ◽  
Liejin Guo ◽  
Haiyuan Yao ◽  
Xin Wang
Keyword(s):  
Real Time ◽  
Slug Flow ◽  
Oil And Gas ◽  
Control Method ◽  
Production Systems ◽  
Cost Effective ◽  
Offshore Platforms ◽  
Oil And Gas Fields ◽  
Offshore Oil And Gas ◽  
Subsea Pipelines

With the development of the offshore oil and gas fields, multiphase transportation technology is becoming more and more important because it’s a cost-effective way for marginal and offshore fields. However, the complexity characteristics of the gas-oil-water multiphase flow, the hard offshore environmental conditions bring huge challenges to offshore platforms, subsea production systems, subsea pipelines and risers. Severe slugs in offshore risers, hydrate and wax block in subsea pipelines and flowlines will appear when the production system is shut down. In this paper, an experimental facility to simulate the riser slug flow is built, and the flow pattern of severe slug is given, the effects of the incline angles and viscosities on the formation of severe slugs in the riser is experimentally studied and analyzed using water-air, oil-air and water-oil and air. On this base, a cost effective real-time recognition technology of severe slug in the riser is present and its related automatic throttle control method has been validated by natural gas and crude oil with the 25m high riser system, which devotes to the future deepwater riser slug control system.

SUBSEA PRODUCTION FOR WELLS DRILLED FROM JACKUP DRILLING UNITS

1987 ◽  
Vol 27 (1) ◽  
pp. 357
Author(s):  
M. Thatcher ◽  
D.B. Marietta
Keyword(s):  
Oil And Gas ◽  
Production Systems ◽  
Oil And Gas Fields ◽  
Offshore Oil And Gas ◽  
The Cost ◽  
Gas Fields ◽  
Offshore Oil

Subsea production systems have been an accepted method of developing offshore oil and gas fields since the installation of the first subsea trees in the early 1960s offshore California. Generally subsea completions have been done from floating drilling vessels on wells with subsea wellhead equipment. A number of wells have been completed subsea by bottom supported jackup rigs on wells drilled using mudline suspension equipment. The subsea completion equipment and methods utilised to adapt mudline suspension wells for a subsea production tree are described. This method of completion offers important benefits as it allows completion of wildcat or delineation wells, it can be used in areas of small, scattered reservoirs, and it can be used in conjunction with floating production systems. The cost associated with these subsea completions is roughly equivalent to those of standard subsea completions from floating vessels. An overview of a typical completion system is presented and compared.

scholarly journals The Progress of Offshore CO2 Capture and Storage

2021 ◽  
Vol 329 ◽  
pp. 01018
Author(s):  
Peilin Liu ◽  
Xueyuan Wang ◽  
Wenfeng Chen ◽  
Rong Hu ◽  
Xiaohan Li
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Emissions ◽  
Oil And Gas ◽  
Current Status ◽  
Offshore Platforms ◽  
Oil And Gas Fields ◽  
The Government ◽  
Offshore Oil And Gas ◽  
Gas Fields ◽  
Offshore Oil

With the development of the offshore oil and gas fields, more and more offshore oil and gas fields are found to have high carbon dioxide. In addition, as peaking carbon dioxide emissions and carbon neutrality were written into the government work report for the first time, the correct separation and emission of CO2 have become a key issue that needs to be solved by offshore oil and gas fields. In this paper, we studied two CO2 separation methods suitable for offshore platforms and the current status of CO2 offshore storage and application. Moreover, the development of offshore carbon dioxide storage application was investigated in detail, and the technical characteristics and application prospects of CO2-EOR and CO2 replacing combustible ice were analysed and discussed. This paper analyses the challenges and countermeasures of offshore CO2 storage from many aspects. It provides a theoretical reference for future CO2 treatment in offshore oil and gas fields.

CoilTAC® Coil Thrust and Carry

2004 ◽  
Author(s):  
Rick Stewart ◽  
Jim Crawford ◽  
Tom Harper ◽  
Larry Kirspel
Keyword(s):  
Oil And Gas ◽  
Complete Removal ◽  
Working Pressure ◽  
Coiled Tubing ◽  
Oil And Gas Fields ◽  
Offshore Oil And Gas ◽  
Pump Pressure ◽  
Helical Buckling ◽  
Gas Fields ◽  
Subsea Pipelines

In producing offshore oil and gas fields there is a need for maintaining flow assurance in the associated pipelines. Restricted and plugged pipelines result in loss of production which is loss of revenue. It is common for these pipelines to exceed the length that can be reached by conventional coiled tubing when cleaning obstructions becomes necessary. Paraffin, asphaltine’s, hydrates and sand are a few of the contaminants that can obstruct flow and cause plugging. Historically, pipeline intervention has been limited to conventional coiled tubing with a reach of only +/−5,000’. A typical maintenance practice involved “pigging” the pipeline with a poly foam pig to remove any obstruction. Under severe conditions multiple pigs with graduated ODs were used. The problem with the poly foam pig is that the flexibility allows it to be forced through a smaller ID, leaving the restriction in place. CoilTAC® (Coil Thrust and Carry), developed by Superior Energy Services, was designed specifically to extend the reach of conventional coiled tubing for pipeline intervention while negotiating a minimum 5D bend. The Thruster was designed for line sizes with internal diameters from 2.900” up. This Thruster system eliminates the compression force on the coiled tubing and has been proven to 14,800’, and it has the ability to exceed 50,000’. The Thruster utilizes a “mechanical intelligence” which is present into the thruster with takes into consideration applied force parameters prior to the cleanout procedure. The key factors are: working pressure of the pipeline, length of the pipeline and the length and size of the coiled tubing to be carried by the thruster. The forward motion of the thruster is initiated by annular pressure applied between the coiled tubing and the inside diameter of the pipeline. The pressure energizes the cups and moves the thruster forward. At a preset pressure, a check value opens inside the thruster allowing fluid to pass to the front of the tool and exit through a series of ports. This causes a washing/jetting action in front of the thruster as it moves down the pipeline. The debris that is removed from the pipeline is returned through the center of the thruster. Retrieving the thruster is accomplished by pumping down the center of the coiled tubing which applies pressure to the front of the tool to reverse the Thruster out of the pipeline. The returns during reverse thrusting are then taken on the coiled tubing/pipeline annulus. Pump pressure moves the thruster in and out of the pipeline not the coiled tubing injector, thus eliminating the helical buckling forces and extending the reach of the coiled tubing. Historically, paraffin-laden pipelines had to be abandoned and new lines laid at great expense to the operator — it was difficult to abandon subsea pipelines without complete removal. Now there is an option with the CoilTAC® system.

scholarly journals Pipeline Bonded Joints Assembly and Operation Health Monitoring with Embedded FBG Sensors

2020 ◽  
Vol 2 (1) ◽  
pp. 5
Author(s):  
Thiago Destri Cabral ◽  
Antonio Carlos Zimmermann ◽  
Daniel Pedro Willemann ◽  
Armando Albertazzi Gonçalves, Jr.
Keyword(s):  
Oil And Gas ◽  
Adhesive Layer ◽  
Cost Effective ◽  
Offshore Platforms ◽  
Bonded Joints ◽  
Reinforced Plastics ◽  
Specialized Equipment ◽  
Fbg Sensors ◽  
Offshore Oil And Gas

Offshore oil and gas platforms present a harsh environment for their installed infrastructure, with pipelines that are subjected to both a corrosive atmosphere and transport of aggressive chemicals being the most critical. These conditions have prompted the industry to substitute metallic pipelines for composite counterparts, often made from fiber-reinforced plastics assembled with bonded joints. Various technologies have emerged in recent years to assess the health of these composite pipelines. In particular, robust speckle metrology techniques such as shearography, although not capable of long-term monitoring, have produced very satisfactory results. However, these inspection techniques require specialized equipment and trained personnel to be flown to offshore platforms, which can incur in non-trivial inspection costs. In this paper, we propose and demonstrate a robust and cost-effective approach to monitor pipeline bonded joints during assembly and operation using fiber Bragg grating (FBG) sensors embedded into the joints’ adhesive layer. This approach allows for informed decisions on when to perform targeted in-depth inspections (e.g., with shearography) based on both real-time and long-term feedback of the FBG sensors data, resulting in lower monitoring costs, a severe increase in monitoring uptime (up to full uptime), and increased operational security.

A review of treatment technologies for produced water in offshore oil and gas fields

2021 ◽  
Vol 775 ◽  
pp. 145485
Author(s):  
Yiqian Liu ◽  
Hao Lu ◽  
Yudong Li ◽  
Hong Xu ◽  
Zhicheng Pan ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Produced Water ◽  
Oil And Gas Fields ◽  
Treatment Technologies ◽  
Offshore Oil And Gas ◽  
Gas Fields ◽  
Offshore Oil

Real-Time Pack Ice Monitoring Systems - Identification of Hazardous Sea Ice Using Upward Looking Sonars for Tactical Support of Offshore Oil and Gas Projects

2011 ◽  
Author(s):  
David Fissel ◽  
Todd Mudge ◽  
Rene Chave ◽  
Matt Stone ◽  
Anudeep Kanwar ◽  
...  
Keyword(s):  
Sea Ice ◽  
Real Time ◽  
Oil And Gas ◽  
Monitoring Systems ◽  
Pack Ice ◽  
Systems Identification ◽  
Offshore Oil And Gas ◽  
Offshore Oil

Pipeline Bundle: A Smart Solution for Infield Transportation—Part 1: Overview and Engineering Design

2009 ◽  
Author(s):  
R. Song ◽  
Z. Kang ◽  
Yuanlong Qin ◽  
Chunrun Li
Keyword(s):  
Engineering Design ◽  
Thermal Performance ◽  
Oil And Gas ◽  
Cost Effective ◽  
Companion Paper ◽  
Transportation Engineering ◽  
Innovative Solution ◽  
Water Pipeline ◽  
Protection Potential ◽  
Offshore Oil And Gas

Pipeline bundle system consisting of carrier pipe, sleeve pipe and internal flowlines offers innovative solution for the infield transportation of oil and gas. Due to its features, pipeline bundle offers a couple of advantages over conventional pipeline in particular for cases where multi-flowlines and high thermal performance are of great interests. The main benefits and advantages of such system include excellent thermal performance to prevent wax formation and hydrates, multiple bundled flowlines, mechanical and corrosion protection, potential reuse, etc. With the developments of offshore oil and gas industries, more and more hydrocarbon resources are being explored and discovered from shallow to deep water. Pipeline bundle system can be a smart solution for certain applications, which can be safe and cost effective solution. The objective of this paper is to overview pipeline bundle technology, outline detailed engineering design issue and procedure. Focus is given to its potential application in offshore for infield transportation. Engineering design principles and procedures for pipeline bundle system has been highlighted. A companion paper addressed the details of the construction and installation of pipeline bundle system. An example is given at the end of this paper to demonstrate the pipeline bundle system concept and its application.

Chemical Deliquification of Unconventional Gas Wells

2014 ◽  
Author(s):  
K.. Francis-LaCroix ◽  
D.. Seetaram
Keyword(s):  
Natural Gas ◽  
Best Practice ◽  
Oil And Gas ◽  
Large Deviation ◽  
Cost Effective ◽  
Gas Production ◽  
Lessons Learned ◽  
Offshore Platforms ◽  
Gas Wells ◽  
Current Production

Abstract Trinidad and Tobago offshore platforms have been producing oil and natural gas for over a century. Current production of over 1500 Bcf of natural gas per year (Administration, 2013) is due to extensive reserves in oil and gas. More than eighteen of these wells are high-producing wells, producing in excess of 150 MMcf per day. Due to their large production rates, these wells utilize unconventionally large tubulars 5- and 7-in. Furthermore, as is inherent with producing gas, there are many challenges with the production. One major challenge occurs when wells become liquid loaded. As gas wells age, they produce more liquids, namely brine and condensate. Depending on flow conditions, the produced liquids can accumulate and induce a hydrostatic head pressure that is too high to be overcome by the flowing gas rates. Applying surfactants that generate foam can facilitate the unloading of these wells and restore gas production. Although the foaming process is very cost effective, its application to high-producing gas wells in Trinidad has always been problematic for the following reasons: Some of these producers are horizontal wells, or wells with large deviation angles.They were completed without pre-installed capillary strings.They are completed with large tubing diameters (5.75 in., 7 in.). Recognizing that the above three factors posed challenges to successful foam applications, major emphasis and research was directed toward this endeavor to realize the buried revenue, i.e., the recovery of the well's potential to produce natural gas. This research can also lead to the application of learnings from the first success to develop treatment for additional wells, which translates to a revenue boost to the client and the Trinidad economy. Successful treatments can also be used as correlations to establish an industry best practice for the treatment of similarly completed wells. This paper will highlight the successes realized from the treatment of three wells. It will also highlight the anomalies encountered during the treatment process, as well as the lessons learned from this treatment.

Center of Excellence: Leveraging Data to Reduce Incidents on Offshore Oil and Gas Assets

2021 ◽  
Author(s):  
Le Ronan Bayon ◽  
Leah Boyd
Keyword(s):  
Oil And Gas ◽  
Daily Routine ◽  
Offshore Platforms ◽  
Frontline Employees ◽  
Information Campaigns ◽  
Engineering Controls ◽  
Center Of Excellence ◽  
Novel Approach ◽  
Offshore Oil And Gas ◽  
Offshore Oil

Abstract This paper presents a novel approach to finding solutions to unsafe work practices in oil and gas environments—from manufacturing facilities to offshore platforms. The ‘Center of Excellence’ approach is a stepwise process for classifying safety events and harnessing data to reduce incidents during offshore oil and gas E&P activities. The approach includes identifying focus topics related to unsafe practices, forming cross-functional teams with significant field or impacted personnel participation, developing and implementing measures, utilizing the hierarchy of controls to mitigate the issue, and raising company-wide awareness through training and targeted information campaigns. The Center of Excellence process gives top priority to those activities in order to reduce the highest severity and most frequent safety incidents. The teams are then able to more clearly identify feasible solutions, including engineering controls, training, campaigns, and procedures to contain the hazards. The active engagement and involvement of frontline employees who either work in the field or on the factory floor is critical to understand the daily hazards of their work activities and the success of the Center of Excellence approach. With these employees acting as a champion of the developed solution, other workers are more likely to accept and adopt it in their daily routine. This paper reviews practical examples of how the Center of Excellence approach has led to safer practices in the workplace. Examples include improved safety measures for using tightening tools, which led to more than 50% reduction in hand injuries and other safety incidents. A recent example of using the approach to develop safer practices during manual handling of loads (MHL) is also presented. The examples highlight the benefits of bringing multifaceted teams and multiple industry-accepted safety concepts together to resolve common work safety challenges, which can serve as a blueprint for oil and gas companies to reduce incidents across their enterprise.

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