Residual Analysis of 4D Reservoir Simulation Grids

Reservoir simulation grid shown with the structural model, seismic and lathe plots of well logs.

Reservoir simulation grid shown with the structural model, seismic and lathe plots of well logs. Data used with permission of owner.

Predicting reservoir behavior is crucial for avoiding many challenges in the development of a hydrocarbon asset. A reservoir simulation grid is one approach that geoscientists and reservoir engineers take to analyze reservoir models which provide a better understanding of subsurface conditions. Paired with 4D seismic, reservoir simulation grids can yield a standard way of locating subsurface anomalies and generating a 4D understanding of reservoir behavior to make more informed decisions for efficient asset production. With software that allows for integrated quantitative visualization, users can compare data and models and visually analyze the area of interest to make accurate predictions, reduce uncertainty, and increase cost-effectiveness.

Enhancing Reservoir Simulation Grids Through Integration and Comparison

A reservoir simulation model can be developed to replicate actual reservoir characteristics, thus making it easy to identify fluid flow patterns through history matching, determine uncertainties, and make predictions of reservoir behavior. Gridding in the reservoir simulation allows engineers to make accurate geological and petrophysical predictions through proper representation of rock properties including faults and strata, porosity and permeability, pressure, and saturation.

The reservoir simulation grid stores geological properties at grid point and models on a block-by-block basis enabling detailed interpretation. Integration of 4D seismic enhances this prediction of reservoir behavior by adding an increased level of detail—specifically temporal detail—to the picture. The ability to visualize data at its correct geospatial location at specific points in time enables observation of variations, enhancing 4D understanding of the reservoir.

The ability to run the simulation multiple times facilitates observation of variation by comparing values in successive reservoir simulation grids. With this, geologists, geophysicists, and reservoir engineers can:

  • Evaluate complex reservoir properties through a better understanding of subsurface properties.
  • Cross-correlate and compare the 4D seismic attributes with well logs to analyze the accuracy of the model.
  • Minimize uncertainty caused by ambiguous data with time-step arithmetic capabilities.
Cross plot of oil saturation and seismic amplitude early in the life of a reservoir. This shows a decent correlation between the negative amplitudes and higher oil saturation values.

Cross plot of oil saturation and seismic amplitude early in the life of a reservoir. This shows a decent correlation between the negative amplitudes and higher oil saturation values. Data used with permission of owner.

Integrated Visualization for Understanding Reservoir Behavior

The integration of 4D seismic data with a reservoir simulation model allows for a comprehensive understanding of reservoir behavior. The observations based on data visualization and comparison allow users to easily locate variations and anomalous values, essential in identifying the current and future performance of the reservoir. The integration of projected behavior shown by reservoir simulation along with the observed variation of 4D seismic allows asset teams to:

  • Help define flow regions and track fluid migration
  • Identify regions that are depleted and their extent of depletion
  • Determine near wellbore information
  • Simulate production effects over time in the wells
  • Perform history matching to improve the reservoir performance prediction

CoViz 4D: Quantitative Visualization for Successful Analysis

The integrated visualization capabilities of CoViz 4D allow users to understand reservoir performance over time for successful asset planning and development. The ability to filter and scale seismic and simulation data allows asset teams to visually compare and analyze the area of interest. CoViz 4D’s time-step capabilities facilitate the identification of anomalies and variations in the data through the construction of residual anomaly maps. With a 4D understanding of the reservoir and enhanced forecasting, geoscientists and reservoir engineers can easily evaluate their existing operational strategy and make better planning and development decisions.

CoViz 4D, a data visualization analytics software from Dynamic Graphics, Inc., enables oil and gas professionals to easily access and combine all relevant data associated with hydrocarbon assets. Powerful 4D visualization capabilities allow you to explore data relationships through the integration of 4D seismic and reservoir simulation grids to analyze the impact of changing reservoir behavior over time, allowing multi-disciplined asset teams to confidently make operational decisions that positively impact profit and reduce operational risk. To learn more about CoViz 4D contact our team.

FURTHER READING

Understanding the Importance of Data Visualization in the Oil and Gas Industry

Co-visualization of reservoir simulation, wellbore placement, fluid production and interpreted seismic is a powerful tool for asset teams.Engineers and geoscientists in the oil and gas industry benefit from data visualization and analysis tools that merge complex...

Modeling Enhanced Geothermal Systems to Minimize Risk

Enhanced geothermal systems or engineered geothermal systems (EGS) offer significant opportunities to take advantage of geothermal energy. EGS are different from conventional geothermal wells. They are located significantly deeper and require fracturing rock to create...

Utilizing Big Data in Upstream Oil and Gas to Refine Completion Technique in Unconventional Reservoirs

Upstream oil and gas production deals with complex analysis of large data volumes related to the exploration and recovery of an asset. Big data has helped maintain a competitive edge for the industry by proving as a tool for efficient decision-making for the upstream...

Enhancing Geological Modeling Efforts via Data Integration

Subsurface geologic models can be significantly improved by integrating interpreted seismic, borehole data, reservoir simulation models, and virtually any source of xyz data with reservoir attributes such as temperature, pressure, and well logs to foster a better...

Conducting Oil and Gas Production Data Analysis in Unconventional Reservoirs

Temporal SRV analysis in CoViz 4D is an effective way to analyze and understand critical well and formation parameters in unconventional reservoirs.When conducting oil and gas data production analysis, engineers typically examine differing production volumes from...

Identifying Oil Field Best Practices Through 4D Visualization

The visualization above illustrates the 3D/4D spatiotemporal integration of geologic structure, fracture stage events, microseismic events, wellbore trajectories, and well logs.Growth in the oil and gas industry has enabled the collection and utilization of large data...

Seismic Reservoir Monitoring Through Visualization

An ideal design, development, and management plan for hydrocarbon asset development comes from having a better understanding of  all known geological and petrophysical aspects of the subsurface. But given the dynamic nature of the reservoir and its attributes, petroleum professionals can encounter some complexities in the process of in-depth analysis.

Quick, Accurate Relief Well Planning Using 3D Visualization Software

The crucial initial phase in the drilling of a relief well is the development of an extensive relief well plan. The planning requires geoscientists, drilling engineers, and well planners to have detailed information on the subsurface geology and its attributes as well...

Accessibility Tools
hide
XHot Key: CTRL-Q

Share on Social Media