Planning of PVT Measurements
When embarking on a major Enhanced Oil Recovery (EOR) project, one of the earlier tasks is to obtain representative reservoir fluid samples from the field and
to ship them off to a PVT laboratory for a proper analysis to obtain the relevant properties and parameters to evaluate the feasibility of the project. Most operators lack either the trained manpower to coordinate such a fluid sampling and analysis project or just cannot spare the qualified personnel for the project.
Calsep has the experience to coordinate such fluid analysis projects.
Calsep's consultants, in collaboration with the field reservoir engineers,
will provide the appropriate well locations and depths for obtaining the fluid samples. Calsep
will also assist in deciding the sample types and sampling conditions for carrying out the sampling.
Once the samples reach the laboratory Calsep will then help the client to ensure that the samples are properly validated on arrival. Clients
will be advised on which samples will be appropriate for further PVT analysis. Samples
will then be quality checked as they undergo various PVT experiments.
In summary, the deliverables for such a project could include (but not necessarily limited to):
- Support for designing the fluid sampling program
- Support for designing the laboratory program
- QC reports for the fluid samples (including mud contamination study, if required)
- EOS tuned to the experimental data for all reservoir fluids and lumped to a pre-decided number of pseudo-components. This could be a common EOS for various reservoirs or individual
- EOS for each reservoir.
- PVT input file for reservoir simulators (Eclipse Black Oil
and Compositional, VIP Black Oil and Compositional)
- Final report
- PVTsim database files
Other additional features that could be studied (as per requirement):
- Reservoir continuity
- Asphaltene precipitation