Wednesday, December 06
Welcome address by:
T.K. Sengupta, Director (Offshore), ONGC and Workshop Chairperson; Matthew Stanley, Senior Technical Fellow, Cairn India and Workshop Co-Chairperson
Keynote Speech by:
Shashi Shanker, Chairman and Managing Director, ONGC; Utpal Bora, Chairman and Managing Director, Oil India
One of the foremost challenges today is to increase hydrocarbon production and recovery from existing asset base of mature fields with ageing facilities. In the era of harder-to-find new finds, rising development costs and diminishing return of redevelopment of existing brown fields, it is vital to have a well-rounded strategy to identify and mitigate uncertainties and risks associated with reservoir characterisation. The key to successful mature field redevelopment today is accurate predictive capability of the fields and mitigate the uncertainties that lead to failure to produce.
With latest advancement in the industry a detailed description of the reservoir architecture, through an integrated approach with integration of multi-disciplinary skills, knowledge and technological inputs from geoscience, reservoir, geophysics, petrophysics, production and listening to the reservoir becomes critical for optimal field development and help operators to explore new development concepts, identify areas of unswept oil/sweet spots and plan to exploit the reservoir to its maximum potential.
The depleting reserves and very few new discoveries in the future, calls for maximum exploitation from existing proven and matured fields. Designing and completing the wells in a matured field is the key to increase production. In this session, industry technical experts and professionals will discuss the various challenges being faced while drilling and completing wells in a matured field. The current commodity markets dictate a very tight economic model. Wells have to plan so that zero NPT is achieved and common challenges like loss control, anti-collision need to be factored-in. New technologies for managed pressure drilling, under balanced drilling, short radius drilling, etc. can help deliver better results.
Well stimulation is the process of cleaning and/or creating flow channels within the rock formation to improve the flow of hydrocarbons from formation into the wellbore. Well stimulation operations can be carried out in existing as well as newly drilled wells.
Producing formations get impaired due to drilling, completion or production activities, causing productivity loss. It is imperative to characterise the source of productivity impairment so that the right stimulation solution can be offered as a corrective action.
For tight formations, the formation damage may not be critical but fracturing may be required to provide alternative flow path to the wellbore because of the low natural formation permeability.
Well stimulation activities include:
- Restoring the existing flow channels by matrix acidisation.
- Creating flow channels by conventional acid frac or hydraulic fracturing using slick water or guargel.
- New technology alternatives using foam-frac/ shock wave/ plasma pulse/ electro-hydraulic stimulation/etc.
Well management includes all activities throughout the entire life cycle of a well, beginning with initial site selection and ending with permanent well closure. There are environmental and social impacts associated with oil and natural gas exploration, development and production.
The current low oil and gas prices continue to challenge the economics of aging and brownfield assets production. There has been an increasing need from all parts of the upstream oil and gas industry to do more with less. This session will address advances and current practices that allow improvements in productions through implementation of advanced technologies that are used to maximise the extraction of hydrocarbons through efficient production.
To maximise recovery, it is important to improve the understanding of how the reservoir behaves based on real and measured data which are then used to assist in making effective decisions. This session will focus on how the advancement of innovative and best practices adapted by asset owners to maintain, or even exceed, their competitive advantages in the current challenging market conditions, with support from advanced technical solutions provided by the business partners to increase efficiency, reduce cost and maximise recovery.
Session highlights will be topics related to rig and rigless intervention, well integrity management, coil tubing intervention, water control/ gas control and sand management.
With volatile oil prices the need for continued production into the future combined with increasing levels of regulatory compliance featuring asset issues is posing a significant challenge to the oil industry. The idea of integrated production systems and optimisation, ageing facility management and produced fluid management is gaining ever increasing importance and driving the need for resource efficient solutions to make the most out of existing facilities without sacrificing production.
Production decline from a mature field cannot be fully arrested. However, cost optimisation and application of asset integrity in facilities management are some of the areas where collaboration can help in adding extra barrels to production from mature fields.
This session intends to further discuss lessons learnt in dealing with ageing facilities and new ideas for its optimised management with a focus on sustaining or even increasing production as well as safety over extended time.
Thursday, December 07
As new fields get tougher to find, EOR techniques in mature fields are critical to maximise recovery. Chemical EOR still remains one of the most popular EOR methods but thermal recovery, miscible gas flooding, CO2 and microbial EOR techniques have enjoyed increased popularity in the 2000s. Enhanced water flooding like thermally activated gels, low salinity water floods, foam enhanced water flood also received increased attention.
The oil price crash in middle 2010s put up a major challenge for cost intensive EOR applications. Besides, back produced chemicals have detrimental and often unpredictable impact on wells and processing facilities.
It is imperative to accurately predict the reservoir recovery process to optimise EOR schemes. A data driven approach can help maximise every barrel of recovery. New low-cost modular and integrated technology with innovations in existing technology can streamline the process from sub surface to supply chain management to make EOR work. The potential prize at stake is huge.
Artificial lift technology keeps the wells producing, when they lack the energy to produce liquids to surface at economical rates. The term encompasses the numerous tools, equipment, instruments, hardware and software, technologies and techniques used to aid the flow of reservoir fluids from the well bore to the surface.
One needs to evaluate the available lift technologies and also take into account the cost of periodic meticulous maintenance activities. If the best lift method is not selected, factors such as long-term servicing costs, deferred production and low efficiency can drastically reduce the net present value of the project.
The session on artificial lift may include (but not limited to) the following:
- Pump-assisted systems
- Fluid-assisted systems
- Flow enhancement techniques
- Monitoring and control of lift systems
- Selection of best suitable artificial lift mechanism
- Design innovations and improvisations
- Case studies
- Hybrid lift system
Digital oilfield has ineluctably changed the way that oil and gas companies do business. In an era of big data, the digital oilfield—an end-to-end integrated operation system in which real-time data capture helps to optimise everything from drilling and completions to production and safety leading to technological advancement in the sector.
The session may include (but not limited to) the following:
- Are we able to harness the power of big data analytics: how data analytics is transforming production by making predictive maintenance, accurate forecasting and operational excellence a reality
- How can data analytics improve assets tracking and optimise production while saving costs on unscheduled maintenance, aging equipment
- Are we doing justice with the DoF data. Do we have the tools and skills to make use of the data that we receive
- Are we making use of the results of data analytics into operations
- To drive performance and become competitive at any price, businesses need a digital architecture and a highly operating model to enable horizontal insight and utilise modern technologies for more data driven decision-making
Most of the current oil production is from matured fields and hence the life of these fields need to be extended and recovery factors optimised.
In order to achieve this, a multifaceted approach should be followed. To begin with, bypassed oil is to be located through 4D seismic, advanced logging techniques and reservoir simulation. Next is to decide on the placement of wells keeping in view the requirement of water injection and application of EOR techniques.
Completion and artificial lift techniques have undergone a paradigm shift whereby multiple layers can be targeted with minimum human intervention. Both are required to be dovetailed with the application of EOR techniques.
Environmental conditions have now become quite stringent for treatment and disposal of liquids. As there will be considerable amount of water production from matured fields, it has to be properly treated and injected.
The essence of developing a matured field will involve a comprehensive and robust system starting from reservoir management to integrated asset modelling where each activity will play a complementary role for maximum economic benefit.