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Book Chapter

Sand Injectites in Outcrops of Deep-water Clastics

By
A. Hurst
A. Hurst
1University of Aberdeen, Dept. Geology and Petroleum Geology, King’s College, Aberdeen, United Kingdom
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D. Duranti
D. Duranti
1University of Aberdeen, Dept. Geology and Petroleum Geology, King’s College, Aberdeen, United Kingdom
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M. Huuse
M. Huuse
1University of Aberdeen, Dept. Geology and Petroleum Geology, King’s College, Aberdeen, United Kingdom
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J. A. Cartwright
J. A. Cartwright
2School of Earth, Ocean and Planetary Sciences, Cardiff University, Cardiff, United Kingdom
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Published:
January 01, 2008

Abstract

The occurrence of sand injectites is well documented in many hydrocarbon-bearing, deep-water clastic reservoirs. In some fields, injectite sand bodies, and depositional sand bodies that have been modified by liquefaction and fluidization, hold major reserves. These fields were not drilled as sand injectite prospects, but the significance of the injectites became apparent during field appraisal and/or development. However, the first exploration well that deliberately targeted a sand injectite was drilled as recently as 2004 (Rawlinson et al., 2005). Thus, sand injectites (intrusive traps sensu Hurst et al., 2005) constitute a virtually unexplored trapping style.

We believe that many sand injectites are routinely overlooked and/or misinterpreted in subsurface studies. Further, if identified, their significance is frequently underestimated and, except where we know their significance, are not incorporated into static or dynamic models of reservoir performance. We provide illustrations of some of the most spectacular known outcrops of sand injectites, which may be analogs for subsurface reservoir and intrareservoir-scale occurrences.

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Contents

AAPG Studies in Geology

Atlas of Deep-Water Outcrops

Tor H. Nilsen
Tor H. Nilsen
Desceased
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Roger D. Shew
Roger D. Shew
University of North Carolina
Wilmington, North Carolina
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Gary S. Steffens
Gary S. Steffens
Shell International E&P
Houston, Texas
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Joseph R. J. Studlick
Joseph R. J. Studlick
Maersk Oil America Inc.
Houston, Texas
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American Association of Petroleum Geologists
Volume
56
ISBN electronic:
9781629810331
Publication date:
January 01, 2008

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