We are pleased to announce that PetroStrat will be presenting at the Sixth EAGE Borehole Geology Workshop: Advancing Borehole Geology: Integrating Multidisciplinary Approaches. This three-day workshop is taking place in Montpellier, France, from 22–24 September 2025.
This workshop brings together geoscientists from across the globe to explore the latest developments in borehole geology and its integration into 3D subsurface models. The event continues a well-established series focused on bridging the gap between 1-D well data and multi-dimensional earth models, with applications across energy, mining, and environmental sectors.
PetroStrat Presentation: Integrated Core Sedimentology and Borehole Image Log Analysis in Ukraine
Presentation title: Sedimentology of a Visean fluvio-deltaic system through integration of BHI and core, Dnipro-Donetsk Basin
Authors: Suzi Burns, John Cater, Mirko Looser (Petrostrat), Sergii Iareshchenko and Ievgenii Solodkyi (DTEK)
Date: Monday, 22 September 2025
Time: 11:00–11:20
Session: Oral Session 1 – Classical Applications in Sedimentary and Structural Geology
PetroStrat will present findings from recent integrated sedimentological studies undertaken for DTEK in Ukraine. The talk will be delivered by Suzi Burns, Principal Geologist at PetroStrat, and will focus on the integration of borehole image interpretation with detailed core sedimentology from the Semyrenky area in the Dnipro-Donetsk Basin.
Exclusive summary by Suzi Burns and our Reservoir Geology team
In the Semyrenky area of the Dnipro-Donetsk graben in Ukraine, the Visean deposits comprise fluvio-deltaic sediments that were predominantly transported toward the southeast along the graben axis. When we look at the seismic sections of the late Visean study interval, they reveal a “layer-cake” stratigraphy and planar surface morphology where even small changes in sea level could significantly influence the depositional environment over a wide area. Reservoir properties, however, are variable between wells, as indicated by production data which reveals the presence of lateral barriers within what may appear to be extensive and continuous sand layers.
A comprehensive sedimentological analysis and integration of available core and borehole image (BHI) data was therefore undertaken to gain a better understanding of the primary reservoir intervals of interest, and to test whether lateral variations in facies/depositional environment could account for recorded variations in production data. Various gross depositional environments were identified, including stacked fluvial channels, tidal-influenced distributary channels, mouth bars, chute channels, and less frequent hyperpycnal lobes. Additionally, BHI analysis has indicated local deviation of geobody orientations from the regional SE trend in some layers. These factors contribute to explaining the observed reservoir compartmentalisation and the presence of isolated sand bodies.
Short bio of the PetroStrat authors
Suzi Burns (Presenting)
Suzi Burns brings over 25 years of international petroleum industry experience, with a technical focus on sedimentological core description, borehole image interpretation, and reservoir quality evaluation. She joined PetroStrat in 2022, following a career spanning consultancy, service company, and operator roles.
John Cater
John Cater has worked in the petroleum industry for 40 years, including 15 doing mainly field-based studies in the Middle East and Pakistan. He currently focuses on the sedimentology of gravity flows, marginal marine systems and deep-water bottom current deposits. He has worked for a range of consultancy companies based in the UK, the Netherlands and the USA.
Mirko Looser
Mirko Looser has almost 20 years of experience in the oil and gas industry, working for both, operating and consultancy companies. His technical experience includes all aspects of carbonate and clastic sedimentology and petrography, stratigraphy, and a variety of skills required during drilling operations.
Spotlight on PetroStrat’s Borehole Image Log Analysis Service
This presentation features data interpreted through PetroStrat’s specialist Image Log Analysis service. We offer Image Log Analysis as part of our integrated geoscience services, within our sedimentological and reservoir characterisation workflows.
“Borehole image logs provide detailed, orientated views of the borehole wall, allowing our geologists to interpret fine-scale sedimentary and structural features not visible from other datasets. Integration with the core further validates the image log interpretation.”
What can we interpret?
- Image facies and depositional architecture
- Bedding and cross-bedding orientations
- Fractures, faults, and in situ stress indicators
- Palaeocurrent directions for input into palaeogeographic reconstructions
- Reservoir continuity and compartmentalisation
Applications of our Image Log Analysis service
Image log analysis provides a vital data interpretation link between core and seismic scale data sets and is especially valuable when core is unavailable or only limited. It helps operators:
- Reduce subsurface uncertainty
- Improve reservoir models
- Support well placement and development strategies
- Reconcile seismic, core, and production data in complex settings
Our interpretation workflow can be fully integrated with core sedimentology, petrological and petrophysical data, delivering a consistent, scalable understanding of reservoir behaviour.
Find out more on our Reservoir Geology service page.
Everything you need to know about the Sixth EAGE Borehole Geology Workshop
Conference: Sixth EAGE Borehole Geology Workshop
Theme: Advancing Borehole Geology: Integrating Multidisciplinary Approaches
Location: Montpellier, France
Venue: CORUM Montpellier
Date: 22–24 September 2025
