Authors:Zsuzsanna Szabó, Nóra Edit Gál, Éva Kun, Teodóra Szőcs, and György Falus
2015, including the study of the geochemical reactivity of reservoir and cap rocks, as well as evaluating disaster scenarios of CO 2 escape and brine displacement to protected shallower drinking (i.e., fresh) water aquifers of the neighboring area
Authors:István Nemes, Szilvia Szilágyi Sebők, and István Csató
Due to the global oil price crisis in 2014, one of the MOL's preventive/reactive measures was to identify geologically or commercially risky elements within their portfolio. This involved reevaluation of all geologic data from Field A in the Volga-Urals Basin. In re-evaluating Field A, several unexpected challenges, problems and pitfalls were faced by the interdisciplinary team performing the task of building a new database, quality checking, and interpreting data dating back to 1947. To overcome these challenges related to this mature field, new approaches and fit-for-purpose methods were required in order to achieve the overall goal of obtaining a reliable estimation of remaining hydrocarbon potential. In the first phase a first-pass 3D geologic model was constructed, along with wrangling, cleaning and interpreting 70 years of subsurface data. This paper focuses on the main challenges involved in evaluating or reevaluating reservoir aspects of a mature field.
The primary challenges were related to the estimation of remaining in-place hydrocarbon volumes, the optimization of infill well placement, the identification of primary and secondary well targets, the identification of critical data gaps, and the planning of new data acquisitions. The hands-on experience gained during the development of the geologic model provided invaluable information for the next steps needed in the redevelopment of the field.
until the system was opened to contact-external fluids or rocks that provided the reactive components (Fe and Mg) for further tourmaline formation. The amount of boron that was not conserved in the crystalline phases of the closed magmatic system was