Composition sets the diagenetic trajectory of a sandstone before burial begins. A quartz arenite has little to react, compacts mechanically and loses porosity mainly to quartz cement at high temperature. An arkose carries feldspar that may dissolve to create secondary porosity or alter to kaolinite that later illitises. A lithic arenite carries ductile grains that deform under load and destroy porosity by compaction at relatively shallow depth. Volcanic lithics and glass alter to zeolites and clays that occlude pores early. Knowing the detrital composition therefore constrains the reservoir quality outcome before any diagenetic study is done.

Heavy mineral assemblages are modified between source and sink, and interpreting them requires that modification to be accounted for. Hydraulic sorting concentrates dense and equant grains in particular hydrodynamic settings, so an assemblage partly reflects depositional energy rather than source. Weathering in the source area and diagenesis in the subsurface progressively remove unstable species, so an assemblage from a deeply buried sandstone is a residue. Varietal studies, which compare the chemistry of a single mineral species such as garnet or rutile, avoid much of this because the comparison is within one stable species rather than between species of differing stability.

Detrital zircon has become the dominant provenance method and carries its own biases. Zircon is extremely stable so it survives recycling, which means a zircon age spectrum may record a sediment source rather than a bedrock source. Zircon fertility differs enormously between rock types, so a small granite can contribute more zircon than a large volume of mafic or sedimentary rock, and the spectrum is not proportional to the eroded area. Sample size matters statistically, since a small number of analyses will miss minor populations. These are manageable constraints, but a spectrum interpreted without them overstates what it demonstrates.

Finally, provenance changes are correlation surfaces. Where a new source area is tapped, through drainage capture, uplift or a tectonic event, sediment composition changes across the basin at approximately the same time. That change is often abrupt and it is independent of facies, which makes it a correlation tool that works in sand-dominated successions where log shapes repeat and fossils are absent. This is the basis of provenance stratigraphy and it is a practical alternative where conventional correlation fails.

By the end of this training, participants will be able to:

• Conduct and interpret sandstone modal analysis using standard point counting schemes
• Classify sandstones and apply tectonic discrimination diagrams with their limitations understood
• Interpret heavy mineral assemblages and account for hydraulic and diagenetic modification
• Apply varietal and single grain mineral chemistry methods
• Interpret detrital zircon age spectra and recognise fertility and recycling bias
• Apply geochemical provenance methods including immobile element and isotopic tracers
• Reconstruct palaeodrainage and sediment routing from provenance evidence
• Use provenance changes as stratigraphic correlation surfaces
• Predict reservoir quality consequences from detrital composition
• Specify provenance analytical programmes against defined subsurface questions

Organisations sending participants to this training will:

• Predict sandstone reservoir quality earlier using composition
• Correlate successfully in sand-dominated and barren successions
• Constrain sediment supply direction and sand presence in frontier areas
• Specify provenance analytical programmes that answer real questions
• Extract more value from petrographic and heavy mineral data already held
• Build a capability linking sediment composition to exploration and reservoir outcomes

Participants will:

• Analyse and interpret sandstone composition systematically
• Interpret heavy mineral and zircon data critically
• Build provenance stratigraphies for correlation
• Reconstruct sediment routing from composition evidence
• Predict diagenetic behaviour from detrital composition
• Specify and review provenance studies competently

• Exploration geologists working on sediment supply and reservoir presence
• Reservoir geologists predicting reservoir quality
• Stratigraphers working on correlation in difficult successions
• Petrographers and sedimentologists supporting subsurface studies
• Basin analysts reconstructing drainage and sediment routing
• Geoscientists specifying and reviewing analytical programmes
• Experienced geoscientists extending into provenance methods

Upon successful completion of this training course, delegates will be awarded an official Certificate of Completion issued by the Petroleum Engineers Association (PEA), an ISO 9001:2015 certified training organization. The certificate carries 10 Credits and formally records the total learning hours completed.

Each certificate is signed by the Course Facilitator and the CEO of the Petroleum Engineers Association, and serves as verifiable proof of professional training that delegates can present to employers and professional bodies worldwide.