Integrated 3D Subsurface Workflows-Ways to Bridge the Discipline Gap

By

R.P. Miller and D. Urban (BP Exploration (Alaska) Inc.)

Traditionally it has been difficult and or very time consuming to visualize complex data sets from multiple subsurface disciplines. The 3D subsurface visualization world has been dominated by geophysical software, leaving a gap for other disciplines. Using creative work- flows and advanced subsurface modeling tools, 3D interpretations now blur the lines between time and depth, which are now interchangeable, and easily updateable. Drillers, petroleum and reservoir engineers and geoscientists all are working from the same 3D subsurface depth model, displaying and analyzing diverse types of information in a collaborative viewing environment.

The giant Milne Point field on the North Slope of Alaska is a structurally complex field aerially covering over 110 square miles and provides an example of what can be achieved in mature fields with the use of modern 3D subsurface mapping technologies. Streamlined data flows and robust data management practices have allowed the creation of transferable workflows that tap into the best of several vendor 3D interpretation and visualization packages. Static model building cycle times have been dramatically reduced making updates of complex structure and stratigraphy easy. Through industry standard exchange formats complex static descriptions now are easy to transfer and update to simulation gridding packages. Results from dynamic modeling runs are now integrated back into the reservoir characterization and shared with subsurface team members. Complex relationships are discussed with the entire team observing an array of data and interpretations, the results being clearer communication and enhanced decision making.

AAPG Search and Discovery Article #90008©2002 AAPG Pacific Section/SPE Western Region Joint Conference of Geoscientists and Petroleum Engineers, Anchorage, Alaska, May 18–23, 2002.