Petroleum Plumbing Systems

In a large part of offshore New Zealand the present day sea floor is underlain by layers of older sediments that were deposited during the past 80 Million years of Zealandia’s geological history. The pore space in these sediments contains mostly water, but in suitable structures also natural gas or oil. Understanding the movement of these fluids through sedimentary strata and tectonic structures is critical for understanding resource distribution. This project is developing high resolution maps and models to help understand how the sedimentary and structural architecture of Taranaki and Canterbury-Great South basins has affected subsurface petroleum migration. Three-dimensional seismic reflection data are being analysed to reconstruct sedimentary strata and lithology distributions. The results are integrated with high resolution mapping of faults. Well data are analysed to reconstruct stress fields and to map fault properties. Sedimentary and structural information is integrated with geophysical properties and information on geological age to reconstruct the evolution of the sedimentary basin. Subsurface geometries are restored through time to assess the architecture of carrier beds for fluid migration and their effectiveness in charging oil and gas accumulations at different times in basin history. Results will be integrated with geochemical information on source rocks and fluids to create advanced models of the movement of oil and gas in the subsurface.

Recent Project Output

Sedimentary Architecture

Fluvial Systems

Marginal Marine Systems

Basin Floor Fan Systems

Structural Architecture

Fault Property Analysis

Structural Reconstruction

       Stress Field Analysis

Petroleum Systems Modelling

Plumbing of Shallow Gas Systems