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The AAPG/Datapages Combined Publications Database

GCAGS Transactions


Gulf Coast Association of Geological Societies Transactions Vol. 58 (2008), Pages 207-225

Field Study of South Pass 60 Field, Offshore Continental Shelf (OCS): An Integrated Multidisciplinary Approach

Craig Davis1, John Tubb, Jr.1, Cecil H. Truss, Jr.1, Robert Ostrander1, Drayton Prator2, Gary Janik3, Ed Langhetee3, Dennis Giovanetti3, and Steve Buckert4

1INEXS, 1980 Post Oak Blvd., Ste. 2050, Houston, Texas 77056

2Prator and Bett, 712 Main St., Ste. 1830, Houston, Texas 77002

3Dynamic Offshore Resources LLC, 1111 Bagby St., Ste. 505, Houston, Texas 77002

4Petro-Hunt L.L.C., 2901 Wilcrest Dr., Ste. 250, Houston, Texas 77042


Dynamic Offshore Resources (then SPN) acquired the north, west, and east flanks of 40-year-old South Pass 60 Field in 2004. The north area of the field has 121 wells, which have a cumulative production of 48.5 million barrels of oil and 77.5 billion cubic ft of gas. Nine horizons have produced, with an additional four pay-zones unproduced.

The future successful development of the field by Dynamic depends upon a comprehensive process of carefully organizing the previous work, recreating complete wellbore utilization and correlation charts, and 3D seismic mapping to resolve the complex structure and stratigraphy to match the known production within each fault block and reservoir.

Unstable bottom conditions have dictated that platforms be set on top of the salt dome, which has resulted in highly deviated long-reach wellbores that intersect bedding planes at very low angles making well log correlations between the 121 wells very difficult. Dynamic commissioned a field study in the north area with a goal of integrating well logs, and paleontological, 3D seismic, and engineering data to identify and quantify new drill and sidetrack opportunities.

Measured depth (MD) logs were digitized and used with 3D seismic depth maps to create true vertical thickness (TVT) logs. TVT factor and true stratigraphic thickness (TST) were calculated. Arbitrary seismic lines were created along each deviated wellbore to correlate faulting and interpret horizons accurately.

This multidisciplinary field study has yielded many additional exploration and recompletion opportunities for Dynamic, and has resolved countless inconsistencies between production data and previous well correlations.

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