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Open-File Report 98-788

Bulk Densities and Porosities of Cenozoic and Cretaceous Basin-Filling Strata and Cretaceous and Older Basement Rocks, Los Angeles Basin, California, Determined from Measurements of Core Samples

By L. A. Beyer and T. H. McCulloh

Thumbnail of and link to report PDF (768 kB)Abstract

This report describes and provides a digital data file of selected bulk properties of subsurface rocks sampled in and around Los Angeles basin, California. Selected properties include measured dry bulk density (range 0.78 to 3.01 g/cm3), measured or estimated grain (matrix) density, calculated water saturated bulk density (range 1.47 to 3.01 g/cm3), calculated total porosity (range 0 to 69 porosity percent), geologic age, and lithology. Most of the rocks are conventional core samples taken from wells drilled by the petroleum industry. A small percentage of the core samples are from shallow borings. Rocks studied range in age from pre-Cambrian (?) to Recent and include sedimentary (98.8%), and volcanic, metamorphic and intrusive (1.2%) samples. Core samples studied were taken from measured drillhole depths that range from 35 to 20,234 ft (11 to 6,167 m). Version 1.0 of the data base (dated June 1998) contains information for 7378 samples from 234 wells, including two redrilled wells. This report/data base can be accessed on U. S. Geological Survey servers at http://geopubs.wr.usgs.gov/open-file/of98-788. Periodic additions to the on-line data base will be provided as new data is gathered.

First posted August 12, 2002

  • Table 1 XLS (92 kB)
    Download Table 1: Well descriptions as a Microsoft Excel 2000 format (xls) file

For additional information, contact:
Geology, Minerals, Energy, and Geophysics Science Center
U.S. Geological Survey
345 Middlefield Road, MS 901
Menlo Park, CA 94025-3591
http://geomaps.wr.usgs.gov/gmeg/

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Suggested citation:

Beyer, L. A., McCulloh, T. H., 1998, Bulk Densities and Porosities of Cenozoic and Cretaceous Basin-Filling Strata and Cretaceous and Older Basement Rocks, Los Angeles Basin, California, Determined from Measurements of Core Samples: U. S. Geological Survey Open-File Report 98-788, 197 pp., http://pub.usgs.gov/of/1998/0788/.



Contents

Introduction

Previous work

Well descriptions and locations

Summary of data base

Bulk density and porosity equations

Methods

Reliability of measurements

Industrial data

Stratigraphic designations and age assignments

Lithologic descriptors

Estimates of overburden removed

Acknowledgements

References


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