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Using Landmarks DecisionSpace GeoscienceTechnology to Create Validated Structural 3D Models in Complex Geologic Areas

Catalina Luneburg
Landmark Graphics, Highlands Ranch, CO, USA

Abstract

An understanding of the 3D geometry of the subsurface is critical for a cost efficient and optimal exploration and production of reservoirs. The goal is to reduce uncertainty and risk around the interpretation of geologic structures which represent a significant source of error in HC estimates. In particular complex geologic scenarios represent a challenge to main stream interpreters and software providers. The industry has to respond to the increasing geologic complexity of HC plays with comprehensive and innovative solutions which honor classic geologic principles and allow more accurate and geologically reasonable interpretations of complex HC scenarios.

DecisionSpace Geoscience Software offers several technologies around 3D Framework Construction and Structural Modeling that are illustrated in our study area example offshore Nigeria in the prolific HC province of the Niger Delta Basin. The structural model displays syn- and post sedimentary listric normal growth faults that affect the main delta sequence with characteristic rollover structures of growth faults and synthetic and antithetic faults in the crest representing major hydrocarbon traps.

A 3D framework is modeled that correctly networks faults and integrates cross section balancing and structural restoration and forward modeling tools to provide a geologically valid model of a complex extensional HC trap scenario. The validated model can then be used for further analyses such as HC volume calculations that allow a higher confidence level then non-validated models would.

 

AAPG Search and Discovery Article #120140© 2014 AAPG Hedberg Conference 3D Structural Geologic Interpretation: Earth, Mind and Machine, June 23-27, 2013, Reno, Nevada