With easily recoverable oil either gone or continuously depleting, operators are evaluating previously-drilled leaseholds to determine if there are opportunities for further economically-feasible recovery through the recompletion of oil and gas wells. Improvements in production technologies and the ability to translate volumes of data obtained over the life of a reservoir into meaningful 3D visualizations that depict changing subsurface conditions have allowed operators to discover ways in which drilling costs can be reduced and more oil and gas recovered than originally indicated.
Visualize Subsurface Conditions to Guide Recompletion of Oil and Gas Well Strategy
Before acquiring a depleted well or investing in recompletion efforts, reservoir teams need to conduct a detailed geological and geophysical analysis, calculate the remaining reserves, and accurately identify the reasons for declining production rate. This allows them to determine which, if any, recompletion methods could yield the best results.
Software that integrates and visualizes the wide range of data generated during the life of oil and gas wells and facilitates detailed analysis of factors that have impacted well productivity is essential in determining if recompletion of oil and gas wells makes economic sense. That software can also help reservoir teams determine appropriate strategies for recompletion of oil and gas wells in the following ways:
Compare Well Performance Against Similar Offset Wells
Software that easily integrates subsurface and well production data and visualizes it in 3D allows reservoir engineers to easily compare performance among wells. By comparing data from a declining well with production and geologic data of nearby wells, teams can quickly identify factors that negatively influence production, answering questions such as:
- Is proximity to other producers impacting pressure and flow?
- Has a recent seismic survey uncovered bypassed oil that is now reachable via sidetracking?
- What recompletion methods have been used successfully to boost production in nearby wells or wells with similar geologic and geophysical conditions?
- Are they “stacked pay zones” that can be produced, or is time to move on, now that the single geologic layer has been depleted?
When reservoir engineers can evaluate well performance and conditions in the context of nearby or similar wells, they gain a better understanding of the interplay of critical factors—geologic, borehole trajectory, target zones, completion sequence, lift methods, proximity—that influence productivity. Based on a detailed evaluation, engineers can determine whether a well is a candidate for recompletion, and if so, plan the strategy to enhance recovery.
Determine the Appropriate Recompletion Methods
When relevant geologic, geophysical, and production data for wells identified as recompletion candidates can be integrated and visualized in a common shared environment, reservoir engineers can more readily determine the appropriate recompletion methods. The evaluation of subsurface conditions, well logs, rock characteristics (sandstone, shale, carbonates, etc.) and existing well trajectories, review of completion plans and treatments, and analysis of oil-gas-water production trends can help reservoir engineers answer questions that guide recompletion planning and implementation.
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All of these decisions need to be made in light of current market factors as well as reviewing the results of recompletion methods for similar wells. Although a well may be identified as an ideal candidate for recompletion, economic factors may necessitate a project delay until barrel price justifies the investment. Regardless of the decisions reached, access to all relevant data associated with an oil or gas well facilitates a thorough, detailed analysis giving reservoir teams greater confidence in their decisions.
Visualization: Confidently Determine Recompletion Needs
Reservoir engineers gain a far more detailed understanding of reservoir dynamics by using software that integrates relevant data associated with oil and gas wells. The software’s powerful visualization capabilities enable teams to explore the interdependence of geologic, petrophysical, well trajectories, completion methods, and production data that impact well performance. With this level of detailed insight, reservoir teams can more confidently determine the need for recompletion of oil and gas wells and propose recompletion methods to enhance recovery.
Reservoir engineers gain a far more detailed understanding of reservoir dynamics by using software that integrates relevant data associated with oil and gas wells.