Principles of Elemental Chemostratigraphy: A Practical User Guide

1. Introduction 1.1 History and development of chemostratigraphy as a subject 1.2. Principal applications of chemostratigraphy 1.3 commonly used terminology
2. Sampling, sample preparation and analytical techniques 2.1 sampling strategy How sampling strategies are established, types of lithologies that should/should not be sampled, common errors during sampling. 2.2 Sample preparation Correct procedures for washing, grinding and 'picking' of samples and common errors 2.3 Analytical techniques Most commonly used techniques of ICP-OES, ICP-MS and XRF 2.4 Less commonly used techniques Laser based instruments, QEMSCAN, XRD 2.5 Summary and conclusion
3. Geochemistry and mineralogy 3.1 The use of mineralogical data The use of petrographic, XRD, heavy mineral and QEMSCAN data to establish element:mineral links will be discussed in detail 3.2 Application of statistical techniques Principal Components Analysis, Eigenvector analysis and Correlation Coefficient analysis will be discussed in detail 3.3 Graphical analysis Use of binary diagrams to establish element mineral links 3.3 Elements associated with heavy minerals 3.4 Elements associated with carbonate minerals and evaporites 3.5 Elements associated with clay minerals, feldspars and micas 3.6 Classification of sandstones using inorganic geochemical data 3.7 Use of geochemical data to determine changes in source/provenance 3.8 Use of geochemical data to determine changes in depositional environment 3.9 Use of geochemical data to model changes in weathering/diagenesis 3.10 Summary and conclusions
4. Principles of chemostratigraphy 4.1. Choice of key/index elements and ratios How to choose particular elements for chemostratigraphic purposes 4.2 Development of hierarchical schemes 4.3 comparison with wireline log, lithostratigraphic, biostratigraphic and sedimentological data Several case studies will be presented 4.5 Application of statistics Applications of Discriminant Function Analysis, Principal Components Analysis and Histograms 4.6 Common mistakes made during the interpretation of inorganic geochemical data and the establishment of chemostratigraphic schemes 4. 7 Summary and conclusion
5. Applications of chemostratigraphy to clastic and carbonate depositional systems and unconventional reservoirs 5.1 Clastic depositional environments Through case studies, details will be provided on the specific applications of the technique to the correlation of sediments deposited in glacial, continental, shallow marine and deep marine environments 5.2. Carbonate environments How can the technique be used in carbonates? What are the unique challenges of using the technique in this system, compared with that of clastics" Various case studies will be presented in this section 5.3. Application of chemostratigraphy to unconventional reservoirs
6. Applications of chemostratigraphy at wellsite Information provided on the application of chemostratigraphy at wellsite, including the use of chemostratigraphy to place coring points, casing points and total depth (TD) picks.
7. Summary and Conclusions