Description Usage Arguments Details Value Note Author(s) References Examples
View source: R/functionsConventionalAccumulations.R
Performs USGS assessment summarized in Schmoker (2005) as a vectorized Monte Carlo.
1 2 3 | conventionalAssessment(auMC, auType, auCharge, auRocks, auTiming, auFieldNum,
auFieldSize, auGOR = NULL, auNGLGR = NULL, auLGR = NULL, auOGR = NULL,
year)
|
auMC |
number of simulations |
auType |
'Oil' or 'Gas' |
auCharge |
charge probability [between 0 and 1] |
auRocks |
rock probability [between 0 and 1] |
auTiming |
timing probability [between 0 and 1] |
auFieldNum |
Number of possible undiscovered accumulations; |
auFieldSize |
Size of undiscovered accumulations; |
auGOR |
Gas to oil ratio; |
auNGLGR |
Natural gas liquids to gas ratio; |
auLGR |
Liquids to gas ratio; |
auOGR |
Oil to gas ratio; |
year |
The year assessment was published. Mathematical implementation varies based on year. |
Due to the nature of random sampling, the simulation is vectorized and limited only by the available storage. The assessment year determines slightly different implementations:
year < 2014
uses shifted-truncated lognormal distributions for size of fields only. Triangular for number of fields and coproducts.
year >= 2014
uses shifted-truncated lognormal distributions for size of fields and number of fields. Triangular for coproducts.
year < 2013
uses distribution z-score of 2.326 (99% of the distribution)
year >= 2013
uses distribution z-score of 3.09 (99.9% of the distribution)
A list containing three items: list of risked
outputs, list of unrisked
outputs, and vector of Field Sizes (mcFieldSize
). Each row in the
risked
and unrisked
lists represent a singel Monte Carlo iteration variable
combination while the columns contain the sample distributions.
The risked
and unrisked
column names for 'Oil' assessment are as follows:
mcProbability
totalAccumulation
totalGOR
totalNGLGR
mcNumOil
mcGOR
mcNGLGR
mcMEL
The risked
and unrisked
column names for 'Gas' assessment are as follows:
mcProbability
totalAccumulation
totalOGR
totalLGR
mcNumGas
mcOGR
mcLGR
mcMEL
Edited by CDMartinez 29 Dec 15
Created by CDMartinez 28 Dec 15
Schmoker, James W, and T R Klett, 2005, U.S. Geological Survey Assessment Concepts for Conventional Petroleum Accumulations. In Petroleum Systems and Geologic Assessment of Oil and Gas in the Uinta-Piceance Province, Utah and Colorado, U.S. Geological Survey Digital Data Series DDS-69-D, 9 pages.
1 2 3 | OGasmt <- conventionalAssessment(auMC = 5000, auType = "Oil", auCharge = 1, auRocks = 1,
auTiming = 1, auFieldNum = c(1, 2, 10), auFieldSize = c(.5, .8, 10), auGOR = c(200, 400, 600),
auNGLGR = c(35, 85, 115), year = 2013)
|
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