10 Fluid and PVT Analysis: Data Model

This chapter describes the PVT data model, which is composed of the key data objects shown in Figure 10-1 and explained in the sections below.

Figure 10-1 Key data objects of PRODML PVT capabilities.

Note that common to several objects, wherever fluid composition is required, is a system for describing the fluid composition in terms of a catalog of fluid components and their properties; this is described in Section 10.7 Fluid Composition .

The Standard Conditions element is used in many of the PVT objects. A choice is available – either to supply the temperature and pressure for all the volumes which follow, or to choose from a list of standards organizations’ reference conditions. Note that the enum list of standard conditions is extensible, allowing for local measurement condition standards to be used. See Figure 2.3-2 which shows the Abstract Temperature Pressure class: this is the type for standard conditions in all PVT objects.

Use is also made within PVT of the Pressure Value type, allowing absolute or relative pressures. See Section 2.3 PRODML Use of CTA and Figure 2.3-1 .

Chapter 11 Fluid and PVT Analysis: Worked Examples provides an explanation of the examples (files) included with the PVT data object download. The objective is this: An understanding of the basic data model described in this chapter combined with the example files and related explanations provide good working knowledge of how PVT works and can be used.