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Analytical resource assessment method for continuous (unconventional) oil and gas accumulations - The "ACCESS" Method

Open-File Report 2012-1146
Revised version of Open-File Report 00?044
By:  and 
https://doi.org/10.3133/ofr20121146

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Abstract

The U.S. Geological Survey (USGS) periodically assesses petroleum resources of areas within the United States and the world. The purpose of this report is to explain the development of an analytic probabilistic method and spreadsheet software system called Analytic Cell-Based Continuous Energy Spreadsheet System (ACCESS). The ACCESS method is based upon mathematical equations derived from probability theory. The ACCESS spreadsheet can be used to calculate estimates of the undeveloped oil, gas, and NGL (natural gas liquids) resources in a continuous-type assessment unit. An assessment unit is a mappable volume of rock in a total petroleum system. In this report, the geologic assessment model is defined first, the analytic probabilistic method is described second, and the spreadsheet ACCESS is described third. In this revised version of Open-File Report 00-044 , the text has been updated to reflect modifications that were made to the ACCESS program. Two versions of the program are added as appendixes.

Suggested Citation

Crovelli, R.A., and revised by Charpentier, R.R., 2012, Analytical resource assessment method for continuous (unconventional) oil and gas accumulations - The "ACCESS" Method (Revised 2012 by Ronald R. Charpentier): U.S. Geological Survey Open-File Report 2012-1146, iii, 32 p.; ACCESS Version 1 XLS; ACCESS Version 3 XLS, https://doi.org/10.3133/ofr20121146.

ISSN: 2331-1258 (online)

Publication type Report
Publication Subtype USGS Numbered Series
Title Analytical resource assessment method for continuous (unconventional) oil and gas accumulations - The "ACCESS" Method
Series title Open-File Report
Series number 2012-1146
DOI 10.3133/ofr20121146
Edition Revised 2012 by Ronald R. Charpentier
Year Published 2012
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Central Energy Resources Science Center
Description iii, 32 p.; ACCESS Version 1 XLS; ACCESS Version 3 XLS
Online Only (Y/N) Y
Additional Online Files (Y/N) Y
Additional publication details