PetroStrat Ltd have now branched out into sedimentology and reservoir geology. The new department was initiated in the summer of 2014 with the appointment of Peter Lucas who has over 30 years’ experience in sedimentological, petrographic and reservoir geological studies worldwide. Peter is a specialist in the sedimentary and tectonic interpretation of image logs (since 1987).
Sedimentology is complimentary to biostratigraphy and there are many areas of synergy that we now have the capability to exploit.
- Sedimentological core description
- Fracture core description
- Log and image log interpretation
- Facies interpretation
- Cuttings analysis
- Environmental/depositional setting modelling
- Porosity history and reservoir quality modelling.
Sedimentological core description
This includes the logging of grain size, sorting, lithology, Dunham, sedimentary and biogenic structures, pores, oil stain, macro diagenetic features, mud content, degree of bioturbation etc. Very flexible approach which can be targeted to client’s need. Can include direct tabulation of facies from core, and follow-on workshops, etc. Full integration with log data, core analysis data and image logs etc.
Log and image log interpretation
Basic petrophysics from conventional logs for lithology and porosity to aid facies interpretation. More sophisticated processing and display of logs to aid zonal definition and correlation in conjunction with biostratigraphy. Detailed sedimentological interpretation of image logs for sedimentology/facies (including graphical recording of sedimentological features in a form similar to a core log) and thin bed analysis; results can be in both graphical and tabulated formats. Full integrated structural interpretation of image logs, including bedding, solution features, bedding deformation, faults, fractures, breakout, induced fractures etc. Results best when tied to oriented core descriptions. Modelling of fractures, determination of fracture porosity and probable main flow pathways, in-hole stress patterns, etc.
Fracture core description
Includes the digital and graphical recording of fracture types, properties (width, aperture, oil stain, angle, dip direction, fill, continuity etc.) to allow fracture modelling and the determination of fracture porosity and probable main flow pathways. Results can be correlated with, and oriented using, image logs. Interpretation can be on clastic, carbonate, igneous or basement cores.
Full range of petrographic services, including thin section, SEM, porecasts, BSE, CL, XRD, XRF, etc. These can be on core, SWC, outcrop or cuttings samples. Cuttings descriptions includes semi-quantative description using binocular microscope, with optional photographs, or detailed petrographic analysis for lithofacies, textures, mineralogy, diagenesis etc. Results can be tied to logs and to biostratigraphic events, petrophysics and used to aid overall facies interpretations.
Integration and modelling
Full integration of logs, petrophysics, cores, core analysis data, image logs, biostratigraphic data, drilling data etc. to help determine reservoir characteristics, the depositional setting and the associated implications for probable sediment body geometry and continuity. Integration of all data to help determine sequence stratigraphic events to aid modelling and interwell correlation.
Reservoir quality modelling
Integration of facies, core analysis, log porosity and petrographic data to determine the primary and secondary controls on reservoir quality. Diagenetic and porosity history modelling. Use these data to help predict probable changes in reservoir quality vertically and laterally.