|
Sedimentology and Stratigraphic Correlation |
Rider-French Computing Ltd, 153 Cambridge Science Park, Milton Road, Cambridge CB4 4GG, UK
Dipmeter data are logged as a vertical traverse through formations of interest. By analogy to concepts of dip analysis at surface outcrops, not all of the dip data collected by a logging run are of direct relevance to specific interpretation aims. A methodology is required whereby only relevant dip magnitude and azimuth data can be extracted from the mass of logged results. One approach involves the deductive use of log zonation and dip filtering techniques to isolate the dip results that most closely match the geological requirements. Statistical analysis for preferred orientation in the selected dataset gives a result to which clear geological significance can be attached. The principles described can be applied to a variety of sedimentary dipmeter interpretation problems, such as the determination of palaeocurrent directions, considerations of reservoir geometry and preferred bedding orientation.
