Advanced Petrophysical Services

CAYROS group has developed the expertise to help E&P companies better understand their reservoirs, make better decisions faster,  and implement customized, innovative workflows combined with an extraordinary set of sophisticated tools and technologies for cost-effective formation evaluation and advanced petrophysical services.

Depending on the complexity of the reservoirs and final goals of our clients, we customize our workflow to your needs. Whether it’s applying deterministic and probabilistic techniques in complex mineralogy shaly sands, carbonates, tight reservoirs, shale gas, shale oil, CBM, fractured reservoirs or something else, we have the experience you need to succeed.

Rock Typing

By integrating sedimentological studies, core and drilling cutting measurements and descriptions with log data, we can define rock types and petrofacies that allow us to better predict permeability and other properties. We correlate the results to seismic facies and populate geocellular models with petrofacies-specific permeability and saturation-height models.

Permeability and Secondary Porosity modeling

We predict permeability by implementing state-of-the-art interpretation techniques and algorithms and integrating all available information from different disciplines.
We characterize secondary porosity and permeability in naturally fractured reservoirs.

Customized Workflows

Depending on the project objectives, available data, type of reservoirs and other criteria, we offer customized workflows in conventional and unconventional reservoirs to meet and exceed our clients’ expectations.

We help our clients design the correct project and workflow for their assets, and we firmly understand that integrating and honoring all the available data and disciplines is critical.

Core analysis and integration

We are experts in validating, correcting and integrating core analysis data. This is critical, because in many reservoirs (especially unconventional ones) complex mineralogy and organic content results in variable matrix density, which can compromise log porosity estimates. In addition, matrix permeability calculations, log-based rock mechanical properties, and hydrocarbon saturation calculations can be highly inaccurate unless calibrated with core data.

Integrated Flow Characterization

We create integrated three-dimensional models that can be used to estimate in-place-hydrocarbon volumes, reserves, understand and predict reservoir performance and optimize field development.

Petrophysical Services:

Advanced petrophysical services are provided as standalone projects or Integrated analyses to support multidisciplinary studies.

  • Advanced petrophysical Characterization. Deterministic and probabilistic analysis in complex mineralogy clastics and Carbonate reservoirs.
  • Unconventional reservoir modeling. Shale-gas / Shale-oil probabilistic petrophysics , Tight gas analysis, highly fractured carbonates, CBM characterization.
  • Resource and reserve estimation
  • Quick-look analysis
  • Detailed integrated analysis: using Logs (open or cased hole logs, MWD), core data (routine, SCAL), DST, formation tester data, production data, mud logging data, drilling cuttings descriptions and measurements, drilling parameters, etc.
  • Rock typing, petrofacies, and lithotypes classification. Flow units definition.
  • Permeability prediction and Porosity architecture characterization. Diagenesis.
  • Saturation Height Modeling
  • Rock physics characterization
  • Thin bed analysis
  • Low resistivity / low contrast reservoirs
  • Advanced core data analysis and integration.
  • Formation water characterization
  • Seismic rock properties
  • Seismic attributes correlation
  • Well planning and operations. Logging and coring program design.
  • Well logs QC and repair: digitizing, validation, editing, normalization, cycle skip removal, baseline and depth shift, environmental corrections, curve data reformatting
  • Geosteering support

Featured Services


Reservoir Surveillance and
Production Optimization

Advanced Pressure Transient Analysis (PTA) and  Rate Transient Analysis  (RTA) for reservoir surveillance and production optimization.


Reservoir Engineering Services

In a low oil price market scenario, Improving the performance of existing wells that are already producing or suspended is a cost-effective way to offset natural decline, extend field life and improve hydrocarbon recovery.