About This Item
- Full TextFull Text(subscription required)
- Pay-Per-View PurchasePay-Per-View
Purchase Options Explain
Share This Item
The AAPG/Datapages Combined Publications Database
AAPG Special Volumes
Abstract
from:
Chapter 13
Consolidation State, Permeability, and Stress
Ratio as Determined from Uniaxial Strain
Experiments on Mudstone Samples from the
Eugene Island 330 Area, Offshore Louisiana
Beth B. Stump
Texaco Worldwide 
Exploration
and Production
New Orleans, Louisiana
Peter B. Flemings
Pennsylvania State University
University Park, Pennsylvania
ABSTRACT
Uniaxial strain experiments conducted on mudstone cores from overpressured horizons in Eugene Island Block 330 (Gulf of Mexico) reveal information about consolidation state, compaction behavior, and permeability. Maximum past effective stresses for two mudstone samples were experimentally derived and are within 200 psi of porosity-based estimates of in-situ stress. Laboratory measurements of stress ratio (K 0 = 0.85) compare well with in-situ measurements made during leak-off and stress tests (K 0 = 0.84 − 0.91). The high K 0 values suggest that the sediment deformation is primarily plastic at in-situ levels of effective stress. A slope change on the stress-strain curve supports the observation of primarily plastic deformation following yield. Direct measurements of mudstone permeability at estimated in-situ levels of effective stress reveal layer-parallel and layer-perpendicular permeability of 5.32 × 10−4 md (5.25 × 10−19 m2) and 1.17 × 10−4 md (1.15 × 10−19 m2), respectively.
View the First Page
A text abstract of this article is not available. The first page of the PDF appears below.
You may download the first page as a PDF.
Pay-Per-View Purchase Options
The article is available through a document delivery service. Explain these Purchase Options.
| Watermarked PDF Document: $14 | |
| Open PDF Document: $24 |