conventionalAssessment: USGS Conventional Oil and Gas Assessment

In madorning/energySim0.1.0: Spatial Energy Simulation: Linking Subsurface to Surface Resources

Description

Performs USGS assessment summarized in Schmoker (2005) as a vectorized Monte Carlo.

Usage

conventionalAssessment(auMC, auType, auCharge, auRocks, auTiming, auFieldNum,
  auFieldSize, auGOR = NULL, auNGLGR = NULL, auLGR = NULL, auOGR = NULL,
  year)

Arguments

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; c(min,mode,max) [unitless]
auFieldSize	Size of undiscovered accumulations; c(min,mode,max) [unitless]
auGOR	Gas to oil ratio; c(min,mode,max) [CFG/BO]
auNGLGR	Natural gas liquids to gas ratio; c(min,mode,max) [BNGL/MMCFG]
auLGR	Liquids to gas ratio; c(min,mode,max) [BLIQ/MMCFG]
auOGR	Oil to gas ratio; c(min,mode,max) [BO/MMCFG]
year	The year assessment was published. Mathematical implementation varies based on year.

Details

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:

1. year < 2014 uses shifted-truncated lognormal distributions for size of fields only. Triangular for number of fields and coproducts.

2. year >= 2014 uses shifted-truncated lognormal distributions for size of fields and number of fields. Triangular for coproducts.

3. year < 2013 uses distribution z-score of 2.326 (99% of the distribution)

4. year >= 2013 uses distribution z-score of 3.09 (99.9% of the distribution)

Value

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

Note

Edited by CDMartinez 29 Dec 15

Author(s)

Created by CDMartinez 28 Dec 15

References

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.

Examples

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)

madorning/energySim0.1.0 documentation built on May 22, 2019, 2:23 p.m.