Page 14 - Primer on Enhanced Oil Recovery

Hydrocarbon and oil reserves 2

classification

Abstract

Oil, gas and condensate are natural mixtures of hydrocarbon and non-hydrocarbon blends.
Few expressions such as oil, crude oil, crude and petroleum are used interchangeably. The
entomology of the last one has its roots in Greek. It is produced from “petro”, which
means “stone”, and “oleum” “oil”. It is used to mean crude oil. In everyday life oil
most usually refers to any viscous liquid.

Chapter Outline

2.1 Definition of hydrocarbon products 5
2.1.1 Natural gas 8
2.1.2 Condensate 9
2.2 Oil reserve classification 9
2.2.1 Basic principles of SPE-PRMS classification in the assessment of hydrocarbon reserves and
resources 14
2.3 Reserve calculation methods 16
2.3.1 Analogy methods 16
2.3.2 Volumetric methods 17
2.3.3 Decline curve analysis 18
2.3.4 Material balance 19
2.3.5 Reservoir modeling (Simulation) 20
2.4 Oil recovery factor 21
2.4.1 Regulatory bodies and frameworks 26

2.1 Definition of hydrocarbon products

Oil, gas and condensate are natural mixtures of hydrocarbon and non-hydrocarbon
blends. Few expressions such as oil, crude oil, crude and petroleum are used inter-
changeably. The entomology of the last one has its roots in Greek. It is produced
from “petro”, which means “stone”, and “oleum” “oil”. It is used to mean crude
oil. In everyday life oil most usually refers to any viscous liquid.
Crude oil is a natural oily (viscous) flammable liquid with a specific odor. It
contains mainly hydrocarbons such as alkanes (linear molecules, single bonds,
Primer on Enhanced Oil Recovery. DOI: https://doi.org/10.1016/B978-0-12-817632-0.00002-5
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