Alla Shogenova | Tallinn University of Technology (original) (raw)

Papers by Alla Shogenova

Zenodo (CERN European Organization for Nuclear Research), Jul 10, 2022

CO2 transport, storage and monitoring (TSM) cost for the Carbon Capture and Storage (CCS) scenari... more CO2 transport, storage and monitoring (TSM) cost for the Carbon Capture and Storage (CCS) scenario was estimated for Buzzi Unicem Vernasca Cement Plant (BUV СP) and HeidelbergCement Group Italcementi Calusco D'adda (HCICD) CP, located at 125 and 34 km via pipelines distance respectively from the Malossa storage site. Total emissions produced in 2020 by two CPs were 1.2 Mt CO2. About 1.1 Mt CO2 captured annually and 23 Mt during 20 years of the project duration could be transported and stored in the prospective for CO2 storage 83 m thick Upper Miocene Messinian Sergnano Gravel conglomerate Formation located at 1240 m depth in the Malossa structure. 3D geological static models of the storage reservoir in the Malossa structure (34 km 2 area) were constructed using 18 wells and PETREL software. Estimated TSM costs were the most economic for HCICD CP (4 €/t CO2 avoided), explained by the close location to the Malossa storage site and sharing of monitoring costs with BUV CP. TSM cost for BUV CP is higher (15.1 €/t CO2) explained by the longer pipeline distance (125 km) and the needed CO2 recompression. Total costs for the CCS scenario will depend on the final costs of Ca-looping CO2 capture at the BUV CP achieved by the CLEANKER project. The estimated maximum total CCS cost for BUV CP could be 73 €/t CO2 avoided, the maximum CCS cost for HCICD CP is 62 €/t CO2. These costs are already feasible considering 80-90 €/t CO2 price in EU ETS reached in 2021.

66th EAGE Conference & Exhibition, 2004

P044 Geostatistic modeling of geological processes in the northern part of the Baltic Palaeozoic ... more P044 Geostatistic modeling of geological processes in the northern part of the Baltic Palaeozoic basin: case study from Ordovician A. SHOGENOVA Abstract 1 Geostatistic methods were applied for interpretation of geological processes using multivariate geochemical petrophysical and geological data from the Estonian part of the Baltic sedimentary paleobasin. Case study of the Middle Ordovician (Arenig macrocycle Volkhov stage) rocks is shown. The Volkhov stage is distinguished in the Baltic Basin by widespread regional distribution of carbonate-argillaceous rocks with glauconite impurities regional dolomitization and by thin goethite ooids layer in the northeastern Estonia. Multivariate R-mode factor analysis and regression analysis helped

Proceedings, Jun 4, 1996

Magnetic properties of Ordovician and Silurian sedimentary rocks and their chemical compositionin... more Magnetic properties of Ordovician and Silurian sedimentary rocks and their chemical compositionin were studied to reveal properties alterations in the different-age rocks, and in fracture zones and to establish geological processes causing these alterations.

Proceedings, May 29, 1995

The Ordovician sedimentary basin in Estonia is composed of alternating thin layers of argillaceou... more The Ordovician sedimentary basin in Estonia is composed of alternating thin layers of argillaceous to a different degree carbonate rocks. The total thickness of Ordovician rocks is about 50-200 metres. Middle Ordovician rocks include the commercial seam of oil shale (kukersites), the early Ordovician layers include the commercial seam of shelly phosphorites.

60th EAGE Conference and Exhibition, 1998

Estonian shallow sedimentary basin consists of thin-bedded argillaceous to varying degree limesto... more Estonian shallow sedimentary basin consists of thin-bedded argillaceous to varying degree limestones and different origin dolomites.

Eesti NSV Teaduste Akadeemia toimetised, 1989

Eesti NSV Teaduste Akadeemia toimetised, 1991

Bulletin of The Geological Society of Finland, Jun 1, 2013

This study is focused on two structures in the Baltic offshore region (E6 and E7 structures in La... more This study is focused on two structures in the Baltic offshore region (E6 and E7 structures in Latvia) prospective for the geological storage of carbon dioxide (CO 2). Their CO 2 storage capacities were estimated recently with different levels of reliability. Petrophysical, geophysical, mineralogical and geochemical parameters of reservoir rocks represented by quartz sandstones of the Deimena Formation of Middle Cambrian in two wells and properties of Silurian and Ordovician cap rocks were additionally studied and interpreted in the present contribution. Extended methodology on rock measurements and estimation of conservative and optimistic storage capacity are presented. Uncertainties and risks of CO 2 storage in the offshore structure E6 estimated as the most prospective for CO 2 geological storage in the Baltic Region, and the largest among all onshore and offshore structures studied in Latvia, were discussed. We re-estimated the previous optimistic capacity of the E6 structure (265-630 Mt) to 251-602 Mt. Considering fault system within the E6 structure we estimated capacity of two compartments of the reservoir separately (E6-A and E6-B). Estimated by the optimistic approach CO 2 storage capacity of the E6-A part was 243-582 Mt (mean 365 Mt) and E6-B part 8-20 Mt (mean 12 Mt). Conservative capacity was 97-233 Mt (mean 146 Mt) in the E6-A, and 4-10 Mt (mean 6 Mt) in the E6-B. The conservative average capacity of the E6-B part was in the same range as this capacity in the E7 structure (6 and 7 Mt respectively). The total capacity of the two structures E6 and E7, estimated using the optimistic approach was on average 411 Mt, and using the conservative approach, 159 Mt.

Earth and Space Science, Jul 1, 2015

The objective of this study was to determine the influence of the possible CO 2 geological storag... more The objective of this study was to determine the influence of the possible CO 2 geological storage in the Baltic Region on the composition and properties of host rocks to support more reliable petrophysical and geophysical models of CO 2 plume. The geochemical, mineralogical, and petrophysical evolution of reservoir sandstones of Cambrian Series 3 Deimena Formation and transitional clayey carbonate caprocks of Lower Ordovician Zebre Formation from two offshore structures in Latvia and Lithuania and two onshore structures in Latvia, induced by laboratory-simulated CO 2 geological storage, was studied for the first time in the Baltic Region. The geochemical, mineralogical, and petrophysical parameters were measured in 15 rock samples, before and after the alteration experiment. The diagenetic alterations of reservoir rocks were represented by carbonate cementation in the top of the onshore South Kandava structure, and quartz cementation and compaction, reducing the reservoir quality, in the deepest offshore E7 structure in Lithuania. The shallowest E6 structure offshore Latvia was least affected by diagenetic processes and had the best reservoir quality that was mainly preserved during the experiment. Carbonate cement was represented by calcite and ankerite in the transitional reservoir sandstones of very low initial permeability in the upper part of the South Kandava structure. Its dissolution caused a significant increase in the effective porosity and permeability of sandstones, a decrease in the weight of samples, bulk and matrix density, and P and S wave velocities, demonstrating short-term dissolution processes. Only slight geochemical changes occurred during the experiment in offshore reservoir sandstones. Minor dissolution of carbonate and clay cements, feldspar and some accessory minerals, and possible minor precipitation of pore-filling secondary minerals associated with slight variations in rock properties, demonstrating both short-term and long-term processes, were suggested. As a novelty, this research shows the relationship between diagenetic alterations of the Cambrian Series 3 Deimena Formation reservoir sandstones and their changes caused by the CO 2 injection-like experiment. Our study is focused on CO 2 storage in deep saline aquifers overlain by the caprock (seal). This is the most widespread worldwide option currently under consideration for CO 2 Geological Storage (CGS). The SHOGENOV ET AL. EXPERIMENTAL MODELING OF CO 2 STORAGE 262

Proceedings, 2017

The main unconventional energy technologies, including those aiming on fighting global climate ch... more The main unconventional energy technologies, including those aiming on fighting global climate change are considered for climate change mitigation and sustainable development. Research and development within five pillars of sustainability are required for implementation of these technologies. Economic, social, and environmental pillars were determined since 1987. Political support and technological development are additional pillars proposed here for sustainable development of underground resources. Integrated use of the underground resources is one of the possible ways for sustainable development, permitting to share geological information, perform common techno-economic feasibility studies, share infrastructure and labour costs, and to improve overall economics of exploration and exploitation of underground resources. Synergy of CO2 storage and CO2 use for enhanced recovery of energy resources and renewables can also reduce costs of these technologies. The underground can be used for several purposes at the same site. The shallowest resources are potable water and geothermal energy, followed by gas storage, CO2 and energy storage and deep geothermal energy, which potential is increasing with depth. Different requirements for storage of various media could determine the priority for using of subsurface and avoid conflict of uses. Cheaper technologies could be easier transferred to developing nations supporting social equity of population.

Proceedings of the Estonian Academy of Sciences. Geology, 2005

The Devonian sedimentary sequence of Estonia is mainly composed of terrigenous rocks, but include... more The Devonian sedimentary sequence of Estonia is mainly composed of terrigenous rocks, but includes also carbonate and mixed carbonate-siliciclastic rocks. The accumulation of siliciclastic sediments has recurrently alternated with carbonate sedimentation. Carbonate rocks are best represented in the Narva Regional Stage where they are fully dolomitized. In addition to pure dolostones, dolomitic marlstones, and siliciclastic sediments, mixed carbonate-siliciclastic rocks were recorded in six studied drill cores (Ruhnu (500), Taagepera, Tartu (453), Valga (10), Võru, and Värska (6)). Mixed rocks were deposited in transitional tidal flat conditions of shallow epicontinental sea during simultaneous accumulation of carbonate and siliciclastic material. They include also terrigenous rocks cemented by dolomite during diagenesis. According to mineralogical, petrographical, and geochemical data, early diagenetic dolostones and dolomitic marlstones were deposited in the shallow nearshore tidal flat environment in the sea water saturated with Mg, but changed in the next stages of diagenesis. Siliciclastic rocks were cemented during middle and late diagenesis by Mgand Mn-enriched fluids. Sometimes cement of siliciclastic and mixed rocks is represented by gypsum and late diagenetic calcite. The porosity of Devonian rocks increases with increasing clay content, and decreases with mechanical compaction, dolomitization, and carbonate cementation. The sedimentation and diagenetic history are reflected in gamma-ray logs.

68th EAGE Conference and Exhibition incorporating SPE EUROPEC 2006, 2006

Ordovician carbonate succession from southern Estonia is mainly represented by primary limestones... more Ordovician carbonate succession from southern Estonia is mainly represented by primary limestones and calcitic marlstones and by dolomitized carbonate rocks (dolostones and dolomitic marlstones). For case study 110 core samples from two boreholes were analysed by geochemical and petrophysical methods. Rocks were initially subdivided into groups using data of carbonate chemical analysis. It is shown that primary and dolomitized rocks could be lithologically discriminated using porosity-density cross-plot. Gamma-ray log permits to determine thin reference layers of metabentonites and claystones, and to determine clayey rocks (marlstones) from more pure carbonates. Ordovician dolostones are characterized by increase in magnetic susceptibility the most significant in the late diagenetic dolostones. Their magnetic susceptibility may be higher than in marlstones. Magnetic susceptibility is offered to apply for dolostone genesis determination together with density, porosity and gamma-ray logs, and for express determination of dolostones in drill cores and outcrops.

58th EAEG Meeting, 1996

In Estonia, the sedimentary bedrock resting on the planated surface of the crystalline basement, ... more In Estonia, the sedimentary bedrock resting on the planated surface of the crystalline basement, is divided into three tectonic stages, called Baikalian (Vendian and Lower Cambrian, Lontova Stage incl.), Caledonian (Postlontovan Cambrian, Ordovician, Silurian and Lower Devonian, Tilze Stage incl.), and Hercynian (Posttilzean Devonian) (Suveizdis, 1979). The tectonic stages are separated by regional angular or major stratigraphic unconformities.

72nd EAGE Conference and Exhibition incorporating SPE EUROPEC 2010, 2010

Primary composition, diagenetic changes and physical properties of Neoproterozoic (Ediacaran) and... more Primary composition, diagenetic changes and physical properties of Neoproterozoic (Ediacaran) and Palaeozoic (Cambrian, Ordovician, Silurian, Devonian) sedimentary rocks of the shallow part of the Baltic Sedimentary basin, located in Estonia have been studied during last decades. Chemical and physical parameters, lithology and mineralogy of the rocks were analysed together using statistical methods. Common approach, based on chemical parameters, was applied here for classification of sedimentary rocks. Primary Ordovician and Silurian carbonate rocks (limestones and calcitic marlstones) were compared to secondary rocks (dolostones and dolomitic marlstones). The last were compared to Devonian secondary rocks. Cambrian, Ordovician and Devonian siliciclastic rocks were compared to mixed carbonate-siliciclastic and to Ediacaran rocks. Sedimentation processes determined detrital input, clay, primary iron minerals content, and primary porosity of the rocks. Dolomitization of different genesis caused an increase in grain density, secondary porosity and remagnetization of carbonate rocks. Dolomite cementation, in places rich in iron compounds, caused decrease in porosity of Devonian and Cambrian siliciclastic rocks. Porosity of rocks formed during both primary and secondary processes correlates with their density, acoustic velocity and thermal conductivity. In contrast to pure limestones chemical composition and properties of dolostones depend on diagenesis and especially on composition of dolomitizing fluids.

Proceedings of the Estonian Academy of Sciences. Geology, 1990

83rd EAGE Annual Conference & Exhibition

In this study we (1) selected and sampled two onshore and two offshore geological structures with... more In this study we (1) selected and sampled two onshore and two offshore geological structures within the Cambrian saline aquifer suitable for CO2 geological storage in the Latvian area of the Baltic Region, (2) determined reservoir quality of the Cambrian sandstones prospective for CO2 storage in four structures, (3) estimated storage capacity, (4) studied geochemical, mineralogical and petrophysical alterations of the host reservoir and cap rocks, induced by CO2 storage and (5) provided coupled perophysical and seismic numerical modelling of CO2 plume within one offshore storage site. Our study clearly shows effectiveness of applied time-lapse rock physics and seismic numerical modelling methodology to detect presence of injected CO2 and monitor its evolution in the E6 Baltic Sea offshore structure