Lublin Province
Fracture pattern of the Lower Paleozoic sedimentary cover in the Lublin Basin of southeastern Poland derived from seismic attribute analysis and structural restoration
Kufrasa, Mateusz (Institute of Geological Sciences) | Słonka, Łukasz (Institute of Geological Sciences) | Krzywiec, Piotr (Institute of Geological Sciences) | Dzwinel, Krzysztof (ORLEN Upstream Sp z o.o.) | Zacharski, Jarosław (ORLEN Upstream Sp z o.o.)
Abstract We have characterized Late Devonian fracture systems in the northeastern part of the Lublin Basin in Poland using two independent approaches: (1) seismic data conditioning and volumetric attribute analysis and (2) structural restoration, geomechanical modeling, and fracture modeling. The study area was subjected to reverse faulting in the basement and fault-related folding at the end of Devonian. These late Devonian structures were not overprinted by later deformation events. We have applied a set of structurally oriented filters and seismic attributes aimed at highlighting discontinuities to reduce the seismic noise and improved the fracture visibility on structural steering volume. The main faults cutting intra-Neoproterozoic and intra-Ordovician horizons are principal east–west-striking reverse faults and minor northwest–southeast-oriented normal faults. Based on analysis of the seismic-scale faults, we have carried out fracture modeling for strike-slip and compressional stress fields, with a northwest–southeast-oriented axis of maximum compression. We have correlated tentative strikes for tensile, shear, and closing-mode fractures for both stress regimes, with fault-likelihood attribute maps. The observed fracture system can have developed in the strike-slip stress regime, although cracks generated due to gas overpressure, or of pre-Devonian age, are not excluded. The final fracture model may be extrapolated into Silurian strata, but the results should be perceived as a general approximation of structural trends due to significant differences in mechanical properties of Silurian shales and underlying Ordovician carbonates. Improved model calibration could be achieved after inspection of scanner image logs. We believe that understanding the fracture distribution within the gas-bearing Silurian strata may contribute to effective planning and performing of hydraulic fracturing because part of these fracture planes may be reopened and provide new conduits for fluid flow.
- Europe > Poland > Lublin Province > Lublin (0.62)
- North America > United States > Texas (0.46)
- Phanerozoic > Paleozoic > Silurian (1.00)
- Phanerozoic > Paleozoic > Devonian > Upper Devonian (0.69)
- Geology > Structural Geology > Tectonics > Compressional Tectonics > Fold and Thrust Belt (1.00)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock (1.00)
- Geology > Geological Subdiscipline > Geomechanics (1.00)
- Geology > Structural Geology > Fault > Dip-Slip Fault (0.89)
- Geophysics > Seismic Surveying > Seismic Interpretation (1.00)
- Geophysics > Seismic Surveying > Seismic Processing > Seismic Migration (0.67)
- Oceania > Australia > South Australia > Cooper Basin (0.99)
- Oceania > Australia > Queensland > Cooper Basin (0.99)
- North America > United States > Texas > Permian Basin > Yeso Formation (0.99)
- (27 more...)
- Well Completion > Hydraulic Fracturing (1.00)
- Reservoir Description and Dynamics > Unconventional and Complex Reservoirs > Naturally-fractured reservoirs (1.00)
- Reservoir Description and Dynamics > Reservoir Characterization > Seismic processing and interpretation (1.00)
- Reservoir Description and Dynamics > Reservoir Characterization > Faults and fracture characterization (1.00)
Introduction to special section: Characterization of potential Lower Paleozoic shale resource play in Poland
Malinowski, Michal (Institute of Geophysics) | Jarosiński, Marek (Polish Geological Institute — National Research Institute) | Krzywiec, Piotr (Institute of Geological Sciences) | Pasternacki, Andrzej (AGH University of Science and Technology) | Wawrzyniak-Guz, Kamila (AGH University of Science and Technology)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock > Mudrock > Shale (1.00)
- Geology > Geological Subdiscipline > Geomechanics (1.00)
- Geophysics > Borehole Geophysics (1.00)
- Geophysics > Seismic Surveying > Passive Seismic Surveying > Microseismic Surveying (0.35)
- Europe > Poland > Podlasie Basin (0.94)
- Europe > Poland > Lublin Basin (0.94)
- Europe > Poland > Baltic Basin (0.94)
- Reservoir Description and Dynamics > Unconventional and Complex Reservoirs > Shale oil (1.00)
- Reservoir Description and Dynamics > Unconventional and Complex Reservoirs > Shale gas (1.00)
- Reservoir Description and Dynamics > Reservoir Characterization (1.00)
- Management > Energy Economics > Unconventional resource economics (1.00)
ABSTRACT: The aim of this paper is to present workflow of implementing 1-D geomechanical analysis for optimization hydraulic fracturing design. Well stress modelling is very important in case of optimal stimulation of unconventional shale formations. It can be achieved by generating complex fracture system around the horizontal wellbore. Properly designed hydraulic fracturing is currently the best way to improve contact between well and unconventional reservoir. Data gathered during hydraulic fracturing treatments resulted in calibration existing geological models and optimization of future well completions. Geomechanical modelling and results obtained from Lublin Basin Silurian shale formation hydraulic stimulation are good example of cooperation between geology and engineering teams. Similar analysis can be transferred to other unconventional basins, regarding to acquire enough data. The examples showed in this paper illustrate iterative workflow of the ORLEN Upstream Ltd. in improving hydraulic fracturing design. Furthermore, it also demonstrates production potential of shale formations of the Lublin Basin and determines way for exploration unconventional rocks in Poland. 1. INTRODUCTION Exploration and production of unconventional plays requires integration and cooperation across geological and engineering teams. As mentioned previously by Wikel, 2011 , geomechanics is recently becoming more appreciated bridge between geological sciences and engineering practice. It is also one of the most impacting parameters of shale reservoirs. Geomechanical parameters determines how borehole instability features appears, how hydraulic fractures grows and how much proppant can be pumped into formation.
- Geology > Rock Type > Sedimentary Rock > Clastic Rock > Mudrock > Shale (1.00)
- Geology > Geological Subdiscipline > Geomechanics (1.00)
- Geophysics > Borehole Geophysics (1.00)
- Geophysics > Seismic Surveying > Surface Seismic Acquisition (0.46)
- South America > Argentina > Patagonia > Neuquén > Neuquen Basin > Vaca Muerta Shale Formation (0.99)
- North America > United States > Texas > Fort Worth Basin > Barnett Shale Formation (0.99)
- Europe > Poland > Lublin Basin (0.99)
- (31 more...)
- Well Completion > Hydraulic Fracturing (1.00)
- Reservoir Description and Dynamics > Unconventional and Complex Reservoirs > Shale gas (1.00)
- Reservoir Description and Dynamics > Reservoir Characterization > Reservoir geomechanics (1.00)
- Reservoir Description and Dynamics > Reservoir Characterization > Exploration, development, structural geology (1.00)
Multivariate Classification for the Integration of Core, Log and Seismic Data on Intersecting Pre-Stack Inverted 2D Seismic Lines, Lublin Basin, Poland
Handwerger, D.A. (Schlumberger) | Castañeda-Aguilar, R. (Schlumberger) | Dahl, G.V. (Schlumberger) | Borgos, H. (Schlumberger) | Zacharski, J. (Orlen Upstream) | Krawiec, D. (Orlen Upstream) | Buniak, A. (Orlen Upstream) | Prugar, W. (Orlen Upstream) | Suarez-Rivera, R.
Abstract For many unconventional reservoirs, interpretation of subsurface geology alone can be inadequate for determining reservoir potential. As a result, seismic data have not been as fully utilized as they could be. This paper presents a study that leverages multivariate classification methods to integrate core, log and seismic data for the propagation of material properties across two intersecting 2D seismic lines in the Lublin Basin, Poland. In this study, classification of wireline logs is used to isolate zones of expected similar or different material properties. These classes are then integrated with core data in order to determine which classes are most favorable from both a reservoir quality and completion quality perspective (ability to stimulate), based on the large assortment of core measurements. Following characterization of the classification model at log scale, the collection of pre-stack inverted seismic attributes from each 2D line was trained at the near-well traces to recognize the classes provided by an upscaled version of the log-derived classification model. Once the training rules were determined, they were applied to the full 2D data in order to propagate the classes away from the wellbore, and by extension the estimation of all the material properties integrated with the classes from the core measurements. Within the study region, one training well near the intersection of two 2D lines was used. This training well was on the down-thrown block of a large fault identified on one of the lines. Application of the training rules to the seismic attributes on the up thrown block across the fault shows that the up thrown block likely contains a new set of classes (and hence new and uncharacterized material properties) largely different from those available to train the model from the single available well and core. This integrated approach also showed that there is significant vertical and lateral heterogeneity in this portion of the Lublin Basin and that multivariate classification can be an effective means to integrate, scale and propagate material properties through a basin, even with limited available seismic data.
- Geology > Structural Geology (1.00)
- Geology > Geological Subdiscipline > Geomechanics (1.00)
- Geology > Rock Type (0.69)
- South America > Argentina > Patagonia > Neuquén > Neuquen Basin > Vaca Muerta Shale Formation (0.99)
- Europe > Poland > Lublin Basin (0.99)
- Europe > United Kingdom > North Sea > Southern North Sea > Southern Gas Basin > Sole Pit Basin > License P033 > Block 49/12a > Wenlock Field > Leman Sandstone Formation (0.94)
- (2 more...)
From Regional Depositional Architecture to Reservoir-Scale Considerations, Lower Paleozoic Baltic Basin, N Poland
Krzywiec, P.. (Institute of Geological Sciences, Polish Academy of Sciences) | Volterrani, S.. (ION Geophysical) | Slonka, L.. (Institute of Geological Sciences, Polish Academy of Sciences) | Lis, P.. (GeoFuture Consulting) | Buffenmyer, V.. (ION Geophysical) | Malinowski, M.. (Institute of Geophysics, Polish Academy of Sciences) | Lewandowski, M.. (Institute of Geological Sciences, Polish Academy of Sciences)
Abstract The western edge of the East European Craton in Poland has recently been the focus of intense exploration efforts for unconventional hydrocarbons, led by Polish and foreign companies. Results of early exploration wells clearly demonstrate that there are still many unknowns regarding various aspects of the unconventional petroleum system, both regional (structure and depositional architecture of the Lower Paleozoic succession) and more local (variations of shale thickness, TOC, mechanical properties etc.). In order to shed light on some of these problems high-effort regional reflection seismic survey PolandSPAN has been acquired that covered entire Lower Paleozoic basin developed above the SW edge of the East European Craton. Following regional interpretation a feasibility study devoted to seismic reservoir characterization has been completed that allowed to assess applicability of seismic reflection data for reservoir-oriented studies of the Lower Paleozoic shales in Poland. The Lower Paleozoic basin in Poland is located above the southwest edge of the East European Craton, northwest from the Teisseyre – Tornquist Zone which is separating the cratonic plate from the West European Platform (Ziegler, 1992; Doornenbal & Stevenson, 2010). Later Late Paleozoic tectonic movements resulted in compartmentalization of the Lower Paleozoic basin into three sub-basins: Baltic Basin, Podlasie Basin and Lublin Basin (Fig. 1). During the Precambrian/Cambrian, the cratonic edge underwent extension and rifting of the Rodinia supercontinent, while Cambrian – Middle Ordovician subsidence was driven by a post-rift lithospheric thermal cooling (Poprawa et al., 1999; Poprawa, 2006a). In the Late Ordovician – Silurian, the cratonic edge was under the strong influence of the Caledonian thrust belt, and was incorporated into its flexural foredeep basin (Poprawa et al., 1999; Nawrocki & Poprawa, 2006). Deposition was dominated by fine-grained organic rich shales, generally derived from the eroded orogenic wedge and deposited in the distal foredeep basin (Poprawa et al., 1999; Poprawa, 2006b). The Silurian Caledonian foredeep basin encompassed vast areas stretching from the present-day Sweden across Estonia, Latvian, Lithuania, Russia (i.e. Kaliningrad District), Poland, Belarus, Ukraine and farther to the southeast (Poprawa et al., 1999; Skompski et al., 2008; Zdanaviciute and Lazauskiene, 2007). Presently available information regarding the Caledonian orogenic wedge is very limited and mostly indirect, based on e.g. provenance studies of the foredeep infill, as it was destroyed and deeply buried during the later tectonic phases (Poprawa, 2006b).
- Europe > Russia > Northwestern Federal District > Kaliningrad Oblast > Kaliningrad (0.24)
- Europe > Poland > Lublin Province > Lublin (0.24)
- Phanerozoic > Paleozoic > Silurian (0.96)
- Phanerozoic > Paleozoic > Ordovician > Upper Ordovician (0.35)
- Geology > Structural Geology > Tectonics > Plate Tectonics (1.00)
- Geology > Structural Geology > Tectonics > Compressional Tectonics > Fold and Thrust Belt (0.75)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock > Mudrock > Shale (0.70)
- North America > United States > Texas > Permian Basin > Yeso Formation (0.99)
- North America > United States > Texas > Permian Basin > Yates Formation (0.99)
- North America > United States > Texas > Permian Basin > Wolfcamp Formation (0.99)
- (24 more...)
Lower Paleozoic Basins Developed Above the East European Craton in Poland: New Insight from Regional High-Effort Seismic Reflection Data
Krzywiec, Piotr (Institute of Geological Sciences, Polish Academy of Sciences) | Malinowski, Michal (Institute of Geophysics, Polish Academy of Sciences) | Lis, Pawel (GeoFuture Consulting) | Buffenmyer, Vinton (ION Geophysical) | Lewandowski, Marek (Institute of Geological Sciences, Polish Academy of Sciences)
Abstract The Lower Paleozoic basin in Poland is located above the southwest edge of the East European Craton, northwest from the Teisseyre – Tornquist Zone which is separating the cratonic plate from the West European Platform (Fig. 1 & 2; Ziegler, 1992; Doornenbal & Stevenson, 2010). Later Late Paleozoic tectonic movements resulted in compartmentalization of the Lower Paleozoic basin into three sub-basins: Baltic Basin, Podlasie Basin and Lublin Basin (Fig. 3 & 4). During the Precambrian/Cambrian, the cratonic edge underwent extension and rifting of the Rodinia supercontinent, while Cambrian – Middle Ordovician subsidence was driven by a post-rift lithospheric thermal cooling (Poprawa et al., 1999; Poprawa, 2006a). In the Late Ordovician – Silurian, the cratonic edge was under the strong influence of the Caledonide thrust belt, and was incorporated into its flexural foredeep basin (Poprawa et al., 1999; Nawrocki & Poprawa, 2006). Deposition was dominated by fine-grained organic rich shales, generally derived from the eroded orogenic wedge and deposited in the distal foredeep basin (Poprawa et al., 1999; Poprawa, 2006b). The Silurian Caledonian foredeep basin encompassed vast areas stretching from the present-day Sweden across Estonia, Latvian, Lithuania, Russia (i.e. Kaliningrad District), Poland, Belarus, Ukraine and farther to the southeast (Poprawa et al., 1999; Skompski et al., 2008; Zdanaviciute and Lazauskiene, 2007). Presently available information regarding the Caledonian orogenic wedge is very limited and mostly indirect, based on e.g. provenance studies of the foredeep infill, as it was destroyed and deeply buried during the later tectonic phases (Poprawa, 2006b).
- Europe > Poland > Lublin Province > Lublin (0.33)
- Europe > Russia > Northwestern Federal District > Kaliningrad Oblast > Kaliningrad (0.24)
- Phanerozoic > Paleozoic > Ordovician (1.00)
- Phanerozoic > Paleozoic > Devonian (1.00)
- Phanerozoic > Paleozoic > Carboniferous > Mississippian > Middle Mississippian > Visean (0.47)
- Geology > Structural Geology > Tectonics > Plate Tectonics (1.00)
- Geology > Structural Geology > Tectonics > Compressional Tectonics > Fold and Thrust Belt (1.00)
- North America > United States > Texas > Permian Basin > Yeso Formation (0.99)
- North America > United States > Texas > Permian Basin > Yates Formation (0.99)
- North America > United States > Texas > Permian Basin > Wolfcamp Formation (0.99)
- (25 more...)
Regional Geologic Characterization of the Polish Lower Paleozoic Unconventional Play Using an Integrated Seismic and Well Data Approach
Krzywiec, Piotr (Institute of Geological Sciences, Polish Academy of Sciences) | Lis, Pawel (GeoFuture Consulting) | Buffenmyer, Vinton (ION Geophysical) | Malinowski, Michal (Institute of Geophysics, Polish Academy of Sciences) | Lewandowski, Marek (Institute of Geological Sciences, Polish Academy of Sciences)
Summary Characterizing and mapping the regional extent of the Lower Paleozoic shales in Poland has, in the past, been challenging. However, the integration of newly-acquired broadband seismic data, designed to image deeper within the basins and with greater resolution, and key well data has more clearly defined the tectonic structure and regional depositional architecture of the Upper Ordovician-Silurian succession. Geological Background The Lower Paleozoic basin in Poland is located above the southwest edge of the East European Craton, northwest from the Teisseyre - Tornquist Zone which is separating the cratonic plate from the West European Platform (Fig. 1; Ziegler, 1992; Doornenbal & Stevenson, 2010). Later Late Paleozoic tectonic movements resulted in compartmentalization of the Lower Paleozoic basin into three sub-basins: Baltic Basin, Podlasie Basin and Lublin Basin (Fig. 2). During the Precambrian/Cambrian, the cratonic edge underwent extension and rifting of the Rodinia supercontinent, while Cambrian - Middle Ordovician subsidence was driven by a post-rift lithospheric thermal cooling (Poprawa et al., 1999; Poprawa, 2006a). In the Late Ordovician - Silurian, the cratonic edge was under the strong influence of the Caledonide thrust belt, and was incorporated into its flexural foredeep basin (Poprawa et al., 1999; Nawrocki & Poprawa, 2006). Deposition was dominated by fine-grained organic rich shales, generally derived from the eroded orogenic wedge and deposited in the distal foredeep basin (Poprawa et al., 1999; Poprawa, 2006b). The Silurian Caledonian foredeep basin encompassed vast areas stretching from the present-day Sweden across Estonia, Latvian, Lithuania, Russia (i.e. Kaliningrad District), Poland, Belarus, Ukraine and farther to the southeast (Poprawa et al., 1999; Skompski et al., 2008; Zdanaviciute and Lazauskiene, 2007). Presently available information regarding the Caledonian orogenic wedge is very limited and mostly indirect, based on e.g. provenance studies of the foredeep infill, as it was destroyed and deeply buried during the later tectonic phases (Poprawa, 2006b). URTeC 1578800
- Europe > Poland > Lublin Province > Lublin (0.32)
- Europe > Russia > Northwestern Federal District > Kaliningrad Oblast > Kaliningrad (0.24)
- Phanerozoic > Paleozoic > Devonian (1.00)
- Phanerozoic > Paleozoic > Ordovician > Upper Ordovician (0.56)
- Phanerozoic > Paleozoic > Carboniferous > Mississippian > Middle Mississippian > Visean (0.47)
- Geology > Structural Geology > Tectonics > Plate Tectonics (1.00)
- Geology > Structural Geology > Tectonics > Compressional Tectonics > Fold and Thrust Belt (1.00)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock > Mudrock > Shale (0.48)
- North America > United States > Texas > Permian Basin > Yeso Formation (0.99)
- North America > United States > Texas > Permian Basin > Yates Formation (0.99)
- North America > United States > Texas > Permian Basin > Wolfcamp Formation (0.99)
- (24 more...)
The European shale gas revolution is still in its infancy and though its commercial potential could rival that of North America, significant challenges lie ahead. France has put a moratorium on shale gas activity while a comprehensive study into its environmental impact is being carried out, and its National Assembly has voted in favor of a ban on hydraulic fracturing. The potential for shale gas production in Europe is undoubted, as consultancy IHS CERA estimates that Europe’s total shale gas in place could be 6,115 Tcf. Among the key challenges that will determine the ultimate productivity in Europe is a regulatory environment that is currently ill-suited to unconventional gas, the company said. “Regulations designed for traditional exploration and production in Amsterdam. “We expect Europe to be a significant part of future activity.” Poland Leads the Way Poland plays host to Europe’s largest known reserves of shale gas. Leasing activity in the country’s three main basins—the Baltic Basin, the Podlasie Basin in the east, and the Lublin Basin to the south—is well under way. The country is keen to push forward with shale gas production as it looks to break away from its reliance on Russian gas supplies. The US Energy Information Administration (EIA) estimates that Poland has 792 Tcf of risked shale gas in place, with 514 Tcf in the Baltic Basin, 222 Tcf in the Lublin Basin, and the remainder in the Podlasie Basin. Chevron and ExxonMobil have been joined by a large number of smaller players such as DPV Service, Cuadrilla, EUR Energy, and Mazovia Energy in securing acreage across the country. Talisman is carrying out seismic acquisition on con-cessions in the Baltic Basin and it is on track to spud its first two shale gas wells in the fourth quarter of this year, the company said. It moved into the Polish plays through a farm-in arrangement with San Leon Energy for a 60% interest in San Leon’s three concessions. Talisman is committed to drilling a minimum of three wells—Gdansk-W, Braniewo-S, and Szczawno—which cover 600,000 acres. Three optional wells with horizontal sections will be drilled after a successful first phase of testing. San Leon is also engaged in a five-year exploration and development program on its two concessions, Nowa Sol and Wschowa in the Permian Basin South. Both concessions are on trend with prolific Rotliegendes gas and Zechstein oil production. Nexen recently entered into an agreement with Marathon to jointly explore 10 concessions in Poland’s Paleozoic shale play and it says it will pump USD 100 million into shale-related activities. Nexen will acquire a 40% working interest in the concessions, which encompass more than 2 million acres. Marathon is acquiring 2D seismic this year and plans to drill one or two wells in the fourth quarter and potentially seven or eight wells during 2012.
- Press Release (0.55)
- Financial News (0.34)
- Phanerozoic > Paleozoic > Permian (0.54)
- Phanerozoic > Paleozoic > Silurian (0.46)
- Government > Regional Government > North America Government > United States Government (1.00)
- Energy > Oil & Gas > Upstream (1.00)
- North America > United States > Texas > Permian Basin > Yeso Formation (0.99)
- North America > United States > Texas > Permian Basin > Yates Formation (0.99)
- North America > United States > Texas > Permian Basin > Wolfcamp Formation (0.99)
- (44 more...)
Abstract Analysis of pressure and water chemistry data from the Devonian and Carboniferous formations of the Lublin Basin indicates that two regional fluid flow systems are operating within this basin. The Devonian basin is the juvenile basin with compaction-induced centrifugal, lateral water movement (before invasion by meteoric waters), and may be classified as prospective. The Carboniferous basin is an intermediate basin with centripetal water movement, artesian properties and invasion of meteoric water. In this paper author presents the hydrodynamic modelling of hydrocarbon migration and accumulation in the Lublin Basin, Poland. The pressure and water chemistry data have been used to identify hydrocarbon traps within the Devonian and Carboniferous sequences. Introduction The Lublin Basin has been prospected since 1956 and a dozen of oil and natural gas fields were discovered there. Apart from the discovered fields, attention should be paid to the high frequency of oil and natural gas manifestations in the Carboniferous and Devonian strata, observed in the drilling mud and drilling fluids.[1] This paper summarises results of a review of water chemistry and pressure data from Devonian and Carboniferous formation of Lublin Basin. Water analyses are available for samples collected during drill stem tests or field production; these data have been screened to eliminate samples contaminated with drilling or completion fluids. Aquifer pressure measurements are available from drill stem test data or wireline (RFT or MDT) data; the pressure data have been screened to eliminate anomalies that are the result of hydrocarbon effects or sampling errors. The data have been mapped to identify directions and magnitude of fluid flow and to identify hydrocarbon traps within the Devonian and Carboniferous layers. Hydrodynamic Classification of Petroleum Basins H. Coustau et al.[2] classified sedimentary basins according to hydrodynamic conditions and related this classification to their petroleum potential from organic geochemical considerations. Three main types of basins are distinguished.Juvenile basins - not necessarily young, with compaction inducted centrifugal, lateral water movement. Some examples are Nigeria, Gulf of Mexico, North Sea, and northeast Sahara. Petroleum interest in the basins is very strong. Intermediate basins - with centripetal water movement, artesian properties, and freshwater invasions. Some examples include the Persian Gulf, east Sahara, Paris basin, and central Tunisia. Petroleum interest in such basins varies from very strong to moderate and is connected with areas of low velocities of groundwater flow and local high salinity. Sanile basins - with hydrostatic conditions and generally invaded by meteoric waters. Northwest Aquitaine basin and parts of the North Spanish basin are examples. There is little or no petroleum interest. Groundwater flow is initially of great importance to secondary migration and formation of pools. However, if it is too strong or last too long, groundwater retards the formation of pools or even destroys the existing accumulations by dismigration.[2,3]
- Phanerozoic > Paleozoic > Devonian (1.00)
- Phanerozoic > Paleozoic > Carboniferous (1.00)
- Europe > Poland > Zarnowiec Field (0.99)
- Europe > Poland > Lublin Basin (0.99)
- Europe > France > Paris Basin (0.99)
- (3 more...)
ABSTRACT The Stezyca oil and gas field is located in the central part of Lublin Basin, in the south-eastern part of Poland. It was discovered in 1993. Prospective horizons were identified in fluvial sandstones of the Upper Carboniferous. The 3D seismic interpretation, showed an anticline structure with four gas and two oil reservoirs. Up to now, ten wells have been completed. The main gas and oil bearing horizons are located in incised-valley fill sandstones of the ?I2? unit. The purpose of this work is to present the results of core data and well logs integration that has been performed in order to improve formation evaluation of the ?I2? subunit of the ?I? horizon. Sandstones of the ?I2? subunit were cored (entirely or partially) in every well. A series of laboratory petrographic and petrophysical analyses and measurements were carried out including: natural light and UV photography, core description, analysis of thin sections, SEM, XRD measurements of mineral composition, rock matrix density determination, porosity, horizontal and vertical permeability, cementation and saturation exponent measurements and capillary pressure tests. The analysis and quantitative interpretation of well logs was performed by computer program with an algorithm based on a deterministic approach. The set of logging methods included the following conventional logs: SGR, CNL or DSN, SLD or CDL, BHCS, DIL, DLL, MSFL, SED. Core data - well log analysis integration with reference to DST and production tests allowed correction to the applied interpretation model. Results of repeated formation evaluation using improved model were used to calculate gas and oil reserves of the Stezyca Field. Correlation of the ?I2? unit formations of the Stezyca Field between selected wells, including formation evaluation and core data, is presented. The Stezyca oil and gas field is located in the central part of Lublin Basin, in the south-eastern part of Poland. It was discovered in 1993. Prospective horizons were identified in fluvial sandstones of the Upper Carboniferous. The 3D seismic interpretation, showed an anticline structure with four gas and two oil reservoirs. Up to now, ten wells have been completed. The main gas and oil bearing horizons are located in incised-valley fill sandstones of the ?I2? unit. The purpose of this work is to present the results of core data and well logs integration that has been performed in order to improve formation evaluation of the ?I2? subunit of the ?I? horizon. Sandstones of the ?I2? subunit were cored (entirely or partially) in every well. A series of laboratory petrographic and petrophysical analyses and measurements were carried out including: natural light and UV photography, core description, analysis of thin sections, SEM, XRD measurements of mineral composition, rock matrix density determination, porosity, horizontal and vertical permeability, cementation and saturation exponent measurements and capillary pressure tests. The analysis and quantitative interpretation of well logs was performed by computer program with an algorithm based on a deterministic approach. The set of logging methods included the following conventional logs: SGR, CNL or DSN, SLD or CDL, BHCS, DIL, DLL, MSFL, SED. Core data - well log analysis integration with reference to DST and production tests allowed correction to the applied interpretation model. Results of repeated formation evaluation using improved model were used to calculate gas and oil reserves of the Stezyca Field. Correlation of the ?I2? unit formations of the Stezyca Field between selected wells, including formation evaluation and core data, is presented.
- Europe > Poland > Lublin Province > Lublin (0.45)
- North America > United States > Texas (0.30)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock > Sandstone (1.00)
- Geology > Mineral (1.00)
- Geophysics > Borehole Geophysics (1.00)
- Geophysics > Seismic Surveying > Surface Seismic Acquisition (0.45)
- Geophysics > Seismic Surveying > Seismic Interpretation (0.45)