Archive of Texas PTTC Workshops

First Annual Fluids Symposium Reservoir Fluids 2003--PVT and Beyond

Wednesday, June 25, 2003
Core Laboratories Corporate Headquarters, Houston, TX

The Five Reservoir Fluid Types and Their Associated Phase Behavior Patterns
Dr. William D. "Bill" McCain Jr., Texas A&M
(PDF, 444 KB)
At the very core of fluid analysis is the determination of the phase behavior of the fluid, i.e., the determination of how the different or physically distinct parts of the system change and interact with changes in pressure and temperature. The behavior of a reservoir fluid during production is determined by the 'type' of fluid and the shape of its associated phase diagram. Fluid types and behavior should be determined early in the life of the reservoir, as it is the deciding factor in many of the decisions which must be made regarding the reservoir. The method of sampling, the types and sizes of surface equipment, reserve calculations, plan of depletion, and selection of EOR methods are all dependent on the type of reservoir fluid present. This presentation will cover the five reservoir fluid types and their associated patterns of phase behavior.

Oil Base Drilling Muds Characterization and EOS Modeling, Dr. Dave Bergman, BP
(PowerPoint, 2.35 MB)
Contamination of fluid samples from Formation Test Tools by oil-based drilling mud is a fact of life in today's deepwater sampling environment. Hydrocarbon-based mud filtrates become dissolved in the naturally occurring hydrocarbons and thus affect the chemical and physical properties normally analyzed in typical PVT and fluid testing. An understanding in the chemical and physical makeup of the pure filtrate base is the first step in correcting contaminated oil properties to more meaningful, uncontaminated properties. This presentation will investigate both the chemical and physical nature of oil-based drilling fluids and provide insights on how they affect the phase behavior of reservoir fluids.

Flow Assurance—A Pi Cubed Discipline, Dr. Lloyd Brown, ConocoPhillips
(PowerPoint, 411 KB)
Flow assurance is production operation that generates a reliable, manageable, and profitable flow of fluids from the reservoir to the sales point. Flow assurance is critical for economical production in deep water. The significant access limits to seafloor infrastructure in deep water (>1,200-ft. water depth) transform operational problems in shallow-water production into economic and life-limiting events for deepwater assets. Integration of discipline interfaces is a key success factor to the diverse and comprehensive responsibilities of the flow-assurance discipline. It requires the inclusion of all people involved in the value chain of an asset from operations support, to contractor, to the scientist. The flow-assurance discipline drives a new perspective in the approach to reliable production operations. Its vision goes from reservoir to sales and from concept design to operations. This presentation introduces a multi-faceted approach to the task of solving flow assurance issues.

Integration of Geochemistry and Reservoir Fluid Properties Including PVT and Flow Assurance, Dr. John Zumberge and Dr. Kevin A. Ferworn, GeoMark Research
(PDF 2.35 MB)
The relative quality of newly discovered petroleum is an important variable with regard to the ultimate quantity produced from a reservoir, the type and maintenance of production and transport facilities, the net price obtained for the oil, and environmental costs associated with petroleum production. The quality of petroleum hydrocarbons are governed by different geochemical/geological processes including source rock type, thermal maturity and post-emplacement issues such as biodegradation or mixing. Recent studies have shown that integrating geochemical groupings and parameters in traditional engineering correlations significantly improve predictive accuracy.

For more information about this and other PTTC workshops, please contact Sigrid Clift at
512-471-0320 or e-mail