stratigraphic trap

stratigraphic trap

[¦strad·ə¦graf·ik ′trap]
(geology)
Sealing of a reservoir bed due to lithologic changes rather than geologic structure. Also known as porosity trap; secondary stratigraphic trap.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The CNOOC-operated 208/17a-4 Cragganmore appraisal well was spudded on July 19 and is appraising an estimated 500 bcf (83 mmboe) in Paleocene T22 Vaila sandstones in a combined structural and stratigraphic trap.
The new structure, which has been mapped with two-dimensional seismic, covers a twenty-five-square-mile area and is a structural rather than a stratigraphic trap, which means gas-bearing reservoir sands would likely be thicker and more productive than thinner layers of reservoir more likely in a stratigraphic trap.
We believe there is significant additional upside as we conduct appraisal activity closer to the perceived core of this stratigraphic trap where a thicker reservoir section is mapped.
This collection is the result of a May 2004 meeting examining current petroleum industry perceptions of stratigraphic trap exploration together with the technologies, tools, and philosophy of stratigraphic trap exploration.
The Jaguar prospect is a stratigraphic trap located in the Northern North Sea Block 211/22b to the northeast of the Cormorant North oil field.
The CNOOC-operated 208/17a-4 Cragganmore appraisal well was spudded on July 19 and is appraising an estimated 500 bcf (83 mmboe) in Paleocene T22 Vaila sandstones within a combined structural and stratigraphic trap. The original discovery was in 2012, encountering low saturation gas within low permeability sandstones.
Rhea is a Cretaceous-aged stratigraphic trap prospect with multiple reservoir targets and total estimated gross mean unrisked resources in excess of 250m barrels of oil.
However, once discovered and defined, they have been more straightforward to produce since they generally hold very mobile hydrocarbons that have migrated from source rocks to the geologic structure or stratigraphic trap that blocked further hydrocarbon movement.
This has potentially positive implications for the Tweneboa stratigraphic trap prospect, which is scheduled for drilling in the first quarter of 2009.'
aaa The results from the A4 well provide further confirmation of an oil column height of at least 155 feet in Basal Sand 1 in a large structural and stratigraphic trap that encompasses the A1, A2, A3 and A4 wells.
This provides a significant gas resource upside in this stratigraphic trap should Advent successfully identify areas within the interpreted Waggon Creek gas accumulation of thicker reservoir development.