Subsurface studies are a key enabler to translate the potential of a producing field into actual production. Full field reviews, feasibility studies, or field development studies are classic examples of what are often required prior to an investment decision with significant CAPEX. Those studies involve substantial modeling work and may take years to complete.
To unlock the field potential on a shorter time scale, there is a second class of subsurface studies of interest. It comprises rapid, not model based studies, comprising for example spatial production data analysis, production enhancement screening and assessments, single well analysis. Generally, evaluating the production potential of an asset involves simple and quick analytical or semi analytical calculations that preclude the need for numerical simulations; which could be computationally expensive especially when multiple scenarios need to be considered.
While both approaches are in principal suitable and complementing each other to support potential infill drilling, production enhancement and reservoir management decisions, their level of data integration and uncertainty handling as well as accuracy can be very different. This session invites contributions, particularly case studies, from both approaches, to discuss advantages as well as applicability limitations.
Although some of the producing fields have been under production for long time, it does not mean that all the reservoirs and fault blocks are well understood and/or are contributing to the production. This knowledge is more critical in the complex multi-stacked multi-compartmentalized fields, and is a common issue in the complex producing fields in this region where this complexity is translated into the low recovery. To increase the recovery factor, the lesser producing and untouched areas need to be identified and studied through:
The majority of the large producing fields around the world can be classified as mature, where increased infill drilling is required to arrest production decline. As these fields age, wells are shut-in and become idle due to various technical reasons: depletion, water and sand production, scale, well integrity, etc. Idle well count will continue to increase unless actions are taken to revive them and resume production. Idle well inventory is a low cost feed stock to prolonging well life and maximising recoverable reserves from mature assets.
The correct placement of producer and injector wells and their construction quality significantly impacts the immediate and long-term profitability of new wellbores. This applies not only to previously unexplored and unconventional locations with high uncertainty on reservoir distribution and quality, but also brownfields with infill drilling of zones with unswept or bypassed oil, where remaining oil saturation is the key uncertainty.
To maximize the reservoir contact, a number of key components are of relevance. Before the drilling, well types, including horizontal and multilateral wells, construction and trajectories have to be optimised using static and dynamic reservoir models. Reservoir surveillance and potentially appraisal activities can reduce uncertainties in terms of reservoir quality or help present fluid contacts within the target area. During the drilling, well placement technologies provide the ability to see the reservoir as it is being drilled, eliminating sidetracks on wells and enhancing production.
Just as precise well placement has become the critical factor in improving reservoir performance, the application of new technologies for drilling and completing wells are contributing factors for a successful field development and rejuvenation.
This session invites contributions on techno-commercially viable and effective well/completion design and construction stories and best practices, particularly case studies to share experiences and lessons learnt.
This session presents the various methodologies and field examples on effective reservoir management, as well as evaluation and incorporation of different workable IOR and EOR plans in the field life brown field redevelopment planning. EOR/IOR, slow down/ staged slow down, flaring, etc. will be discussed in this session.
This session is focused on proactive surveillance to achieve the goal of maximizing oil and gas recovery from mature fields through production enhancement initiatives and practices. The session will particularly focus on dealing with wells and surface facilities. Under the wells section, justification of new well designs and well surveillance beyond the business-as-usual style is an ongoing challenge, and has to contend with potential high costs and low acceptance of failure. The aim is to motivate participants through revealing success stories where people have been brave and persistent to turn their ideas into reality. And in the consideration of the facilities, we aim to share low-cost and innovative case histories to eliminate bottlenecks and apply appropriate control cycles in a closed-loop process to maintain the optimal operating conditions.
Implemented field production and monitoring operations are the result of completed FDPs and FEED studies. The facilities are designed in such a way that frequent and accurate monitoring results can be used for production forecasting and history matching to achieve the best possible recovery factor, financial planning (government and operating company), allocation factors etc. Downtime, complex workflows resulting in uncertainties and equipment that is not fit for the application can cause disruptions and inaccurate results that could have an immediate impact on the cash flow of the company, amongst other implications. Production operations can involve an array of flow control and measuring devices. Where initial production equipment may have been fit-for-purpose, the aging and poor maintenance of these could lead to the turn down of production test which, in turn, have an effect on why we conduct production monitoring operations in the first place. In addition to this, production conditions can change due to the implementation of production support (i.e. gas lift) or a water cut increase effecting emulsions and handling of water, all the way to enhanced recoveries resulting in the flow of different fluids and flow regimes.
Although challenging, it is of utmost importance to understand the need for uninterrupted and accurate production monitoring throughout the field life. Failing to do so can severely impact short and long term financial and reservoir planning and affect the research and implementation of EOR projects.
This session invites case studies and ideas that can address this topic comprehensively in order to improve the current monitoring situation that may exist in surface facilities:
Most oil and gas wells in Indonesia have been producing for more than 10 years and their rates are not far above their economic limit. Much effort had been made to squeeze the last drop of oil and last puff of gas out of these wells. Some efforts have been successful, some not. In this session, we will discuss the results from a range of activities performed on mature wells, and look for common threads that define success and failure.
This session will host discussion on:
Risk analysis is normally used for identification and gathering of information on risks that could affect a project from achieving optimum potential. Economic analysis, in a nutshell, is used to establish a business case that has economics benefits. Like any other tools, there is the need to balance between too much analysis and to just execute a project by relying on experience supported with enough economics analysis and risk analysis based on latest data.
Are economic analysis and risk analysis enough to lead to operational and investment decisions? Are we relying too much in them without applying common sense and our experience? Decision analysis and quality is a hot topic in our industry, but we have a lot of room for improvement. We apply full-scale workflows to simple decisions, or we apply piece-meal workflows to complex decisions which cause to burn out the following processes and lose sight of the big picture; or conversely, we sometimes decide on intuition or experience, and we use analysis to justify decisions already taken in our heads.
This session will host discussion on: