About This Item

Share This Item

The AAPG/Datapages Combined Publications Database

Houston Geological Society Bulletin


Houston Geological Society Bulletin, Volume 35, No. 6, February 1993. Pages 9-9.

Abstract: Production of Low Resistivity, Low Contrast Reservoirs, Offshore Gulf of Mexico Basin


Previous HitHaroldTop L. Darling1,3 and Robert M. Sneider2,3
1 Schlumberger Well Services Houston, Texas
2 Robert M. Sneider Exploration, Inc., Houston, Texas
3 Committee members of the Houston Geological and New Orleans Geological Societies' joint project on Productive Low Resistivity a d Unconventional Petrophysical Wall Logs, Gulf of Mexico Basin.

Low resistivity, low contrast (LRLC) pay sands in the Gulf of Mexico Basin are being found and produced now. In the past these intervals were often overlooked, considered wet or tight. These LRLC intervals, which contain significant reserves, can be recognized today through proper identification and evaluation techniques using well logs, and samples/cores.

LRLC pay sands in the Gulf of Mexico Basin have been recognized for many years. However, their economic importance has been only recently demonstrated. With the finding of other LRLC zones in clastic basins throughout the world, (e.g.: North Sea, Indonesia, West Africa, Alaska) evaluation and production of these zones has taken new importance. These not-so-obvious pay zones have shown to be of large areal extent and contain many thousands of barrels of hydrocarbons. Thus, proper evaluation and understanding of these zones has become essential.

The principal geologic causes of LRLC are: 1) laminated intervals, 2) dispersed clay, 3) structural clay, 4) altered framework grains, 5) grain size, 6) other.

The major depositional systems containing LRLC reservoirs are: 1) channel fills, 2) delta front and toe deposits, 3) shingled turbidites, 4) deep-water fans including levee-channel complexes.

This knowledge, along with knowledge of wireline tools and responses can be used to build petrophysical models that can evaluate these LRLC reservoirs.

End_of_Record - Last_Page 9---------------


Copyright © 2005 by Houston Geological Society. All rights reserved.