Accurate reservoir characterization benefits every aspect of development and production activities. However, one of the greatest challenges of reservoir characterization concerns the diversity of data used by the individual disciplines of the reservoir team. Each discipline uses specialized software products. Each provides insight into a specific reservoir attribute such as pressure, fluid saturation, net-to-gross, or velocity. Each has inherent value in depicting reservoir characteristics.
Data Visualization Assists in Determining Proven Recoverable Reserves
3D Geologic Models to Depict Subsurface Environment
Refined Reservoir Simulations to Estimate Reserves
Integrating seismic data with reservoir simulation in a 3D collaborative visualization environment enables reservoir teams to make better, more informed decisions regarding reserve estimates.
Reassessed Proven Recoverable Reserves
In the production phase, visualization and analytic software capabilities that bring together the most relevant data regarding changing reservoir conditions can assist reservoir engineers in reassessing proven recoverable reserves in the following ways:
- Compare production volumes to date with estimated ultimate recovery (EUR).
- Evaluate oil-gas-water production metrics for each well across a group of wells or an entire field to help identify candidates for EOR programs.
- Update reservoir models with new interpretations to show how recoverable reserve volumes have changed in response to ongoing well production.
- Explore the underlying reasons (geology, stimulations, wellbore attributes) why production metrics differ from reservoir simulation model predictions.
Based on the outcome of the analysis, reservoir engineers can modify development and production strategies accordingly. That may include adding injection wells to enhance recovery, sidetracking to access newly identified pay zones, use of proppants in fracturing treatments, or any other methods that have been proven successful in nearby wells or reservoirs with similar characteristics.
Time-Step Analysis (4D) for Better Estimates
Time-step analysis (4D) of seismic data and production data also facilitates better estimates of proven recoverable reserves. Time-step analysis can reveal trends that may not otherwise be apparent in 2D charts (decline curves) or 3D images. Time-step seismic data combined and analyzed with production data allow geophysicists and production engineers to:
- Calculate differences between time steps to see how the rate of change in production or oil/gas saturation has varied by well, by field, by recovery method, or other relevant reservoir attributes.
- Update or fine-tune reservoir simulation models per changes observed in recent seismic studies to more accurately forecast production.
- Identify bypassed oil and recalculate the proven recoverable reserve estimate.
- Use data from nearby wells or reservoirs with similar geologic attributes and production history to determine the appropriate secondary or tertiary recovery techniques.
CoViz 4D: A Proven Tool for Estimating Recoverable Reserves
Data integration, visualization, and analysis software like CoViz 4D allows reservoir teams to obtain greater value from the wealth of data generated during the life of a reservoir. Detailed geologic models provide an initial characterization of hydrocarbon reserve location and volume. Seismic data combined with reservoir simulations help refine proven recoverable reserve estimates. As wells are produced, time-step analysis shows how development and production decisions have impacted reserves, allowing reservoir teams to modify strategies to optimize recovery.
Data integration, visualization, and analysis software like CoViz 4D allows reservoir teams to obtain greater value from the wealth of data generated during the life of a reservoir.
CoViz 4D facilitates accurate reservoir characterization, modeling, and monitoring to give engineers the ability to understand subsurface changes in greater detail and implement production strategies to maximize recovery of proven recoverable reserves.
CoViz 4D, a data visualization analytics software from Dynamic Graphics, Inc., gives geologists, geophysicists, and reservoir engineers the ability to easily access and combine all relevant data associated with subsurface environments. Powerful analytic capabilities enable users to explore data relationships, analyze the accuracy of depth conversion of 3D seismic, and visualize seismic well ties and velocity models to facilitate decisions that positively impact profit and reduce operational risk. To learn more about CoViz 4D contact our team.