scholarly journals Method of mine seismic survey for studying geological structure features of Verkhnekamskoye salt deposit

2019 ◽  
Vol 4 ◽  
pp. 121-136
Author(s):  
A.A. Zhukov ◽  
◽  
A.M. Prigara ◽  
R.I. Tsarev ◽  
I.Yu. Shustkina ◽  
...  
Keyword(s):  
Geological Structure ◽  
Seismic Survey ◽  
Salt Deposit

scholarly journals Seismic Methods in Geothermal Water Resource Exploration: Case Study from Łódź Trough, Central Part of Poland

Geofluids ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Tomasz Maćkowski ◽  
Anna Sowiżdżał ◽  
Anna Wachowicz-Pyzik
Keyword(s):  
Estimation Error ◽  
Geophysical Methods ◽  
Petroleum Industry ◽  
Geological Structure ◽  
Seismic Survey ◽  
Energy Potential ◽  
Geothermal Resources ◽  
Geothermal Waters ◽  
Seismic Methods ◽  
Geophysical Surveys

The geothermal waters constitute a specific type of water resources, very important from the point of view of their thermal energy potential. This potential, when utilized, supplies an ecological and renewable energy, which, after effective development, brings many environmental, social, and industrial benefits. The key element of any geothermal investment is the proper location of geothermal installation, which would guarantee the relevant hydrogeothermal parameters of the water intake. Hence, many studies and analyses are carried out in order to characterize the reservoir parameters, including the integrated geophysical methods. For decades, the geophysical surveys have been the trusty recognition methods of geological structure and petrophysical parameters of rock formations. Thus, they are widely applied by petroleum industry in exploration of conventional and unconventional (shale gas/oil, tight gas) hydrocarbon deposits. Advances in geophysical methods extended their applicability to many other scientific and industrial branches as, e.g., the seismic survey used in studies of geothermal aquifers. The following paper presents the opportunities provided by seismic methods applied to studies of geothermal resources in the central Poland where the geothermal waters are reservoired in both the Lower Cretaceous and the Lower Jurassic sedimentary successions. The presented results are obtained from a network of seismic profiles. An important advantage of the seismic survey is that they may support the selection of an optimal location of geothermal investment and determination of the geometry of geothermal aquifer. Furthermore, the application of geophysical methods can significantly contribute to the reduction of estimation error of groundwater reservoir temperature.

3D seismic traveltime tomography imaging of the shallow subsurface at the C O2 SINK project site, Ketzin, Germany

Geophysics ◽  
2009 ◽  
Vol 74 (1) ◽  
pp. G1-G15 ◽  
Author(s):  
Sawasdee Yordkayhun ◽  
Ari Tryggvason ◽  
Ben Norden ◽  
Christopher Juhlin ◽  
Björn Bergman
Keyword(s):  
Velocity Structure ◽  
Velocity Model ◽  
Geological Structure ◽  
Seismic Survey ◽  
Storage Site ◽  
Near Surface ◽  
Shallow Subsurface ◽  
Traveltime Tomography ◽  
Reflection Seismic ◽  
Reflection Data

A 3D reflection seismic survey was performed in 2005 at the Ketzin carbon dioxide [Formula: see text] pilot geological-storage site (the [Formula: see text] project) near Berlin, Germany, to image the geological structure of the site to depths of about [Formula: see text]. Because of the acquisition geometry, frequency limitations of the source, and artefacts of the data processing, detailed structures shallower than about [Formula: see text] were unclear. To obtain structural images of the shallow subsurface, we applied 3D traveltime tomography to data near the top of the Ketzin anticline, where faulting is present. Understanding the shallow subsurface structure is important for long-term monitoring aspects of the project after [Formula: see text] has been injected into a saline aquifer at about [Formula: see text] depth. We used a 3D traveltime tomography algorithm based on a combination ofsolving for 3D velocity structure and static corrections in the inversion process to account for artefacts in the velocity structure because of smearing effects from the unconsolidated cover. The resulting velocity model shows low velocities of [Formula: see text] in the uppermost shallow subsurface of the study area. The velocity reaches about [Formula: see text] at a depth of [Formula: see text]. This coincides approximately with the boundary between Quaternary units, which contain the near-surface freshwater reservoir and the Tertiary clay aquitard. Correlation of tomographic images with a similarity attribute slice at [Formula: see text] (about [Formula: see text] depth) indicates that at least one east-west striking fault zone observed in the reflection data might extend into the Tertiary unit. The more detailed images of the shallow subsurface from this study provided valuable information on this potentially risky area.

A new interpretation of geological structure of Tempoku Coal Field by crooked-line survey

1992 ◽  
Vol 23 (2) ◽  
pp. 241
Author(s):  
O. Nakano ◽  
M. Endo ◽  
E. Ishii ◽  
H. Watanabe
Keyword(s):  
Large Scale ◽  
Geological Structure ◽  
Seismic Survey ◽  
Coal Field ◽  
Coal Seams ◽  
Reflection Seismic ◽  
Line Method ◽  
Northern Island ◽  
New Interpretation ◽  
Seismic Lines

Tempoku Coal Field is located in the northern area of Japan's northern island, Hokkaido. Here the exploration target, the Soya Coal-Bearing Formation, is of Tertiary age overlying Cretaceous basement. The regional structure of the area is characterised by a series of synclines and anticlines trending north-northwest, with several reverse faults. A suite of surveys was carried out in 1991, in the Asajino area in the central part of the coal field. The study included drilling, vertical seismic profiling, and trenching, as well as a reflection seismic survey with the crooked-line method, which is the subject of this paper. The crooked-line method was adopted because of the mountainous terrain of the area. The seismic lines were laid out along existing tracks and valleys. The main geological structure of the area had long been considered to be a monotonous series of folds. However, the 1991 survey revealed a large-scale thrust-related structure in the main coal seams, which presented clear reflectors. Together with the data from other surveys, a reinterpretation of the structure of the Asajino area is proposed.

Geological structure update using fault seal analysis at the early stage of Chayandinskoye gas condensate field development

2021 ◽  
pp. 87-91
Author(s):  
V.A. Markelov ◽  
R.A. Khusainov ◽  
V.Yu. Silov ◽  
E.V. Chepkasova
Keyword(s):  
Block Structure ◽  
Early Stage ◽  
Saturated Porous Medium ◽  
Simulation Models ◽  
Geological Structure ◽  
Gas Condensate ◽  
Seismic Survey ◽  
Gas Oil ◽  
Field Development ◽  
Low Amplitude

The paper shows a sophisticated approach of fault sealing analysis for Chayandinskoye gas condensate field. The gas-oil system of the field is complicated by large number of the geological faults, which leads to its block structure. Preliminary calculations using the field simulation models showed that the faults conductivity might significantly affect technical and economic features of the field. Conducted interference well tests allowed to estimate fault conductivity before the juxtaposed field blocks development. The studies were carried out in gas-saturated porous medium with low formation-pressure conductivity in wells located at distance exceeding 3000 m. Hydrodynamic connectivity between three areas was analyzed. As a result, the field geological structure was locally updated: the initially considered sealing fault identified by the seismic survey data was reconsidered as a partially conductive and additional sealing boundary between two wells was recognized, which wasn’t identified earlier due to its low amplitude. Proposed approach allows to estimate the hydrodynamic blocks connectivity at the early stages of the field development thus to improve simulation models forecasts and project decision making.

USING A GEORADAR TO IDENTIFY POTENTIAL SOURCES OF GAS RISKS AND TO RECOGNIZE THE GEOLOGICAL STRUCTURE OF THE ZECHSTEIN OLDEST HALITE ROCK SALT DEPOSIT (NA1) AT THE POLKOWICE-SIEROSZOWICE MINE

2017 ◽  
pp. 35-46
Author(s):  
Tomasz Chrul ◽  
Waldemar Pawlik ◽  
Joanna Wrzosek
Keyword(s):  
Rock Salt ◽  
Hydrogen Sulphide ◽  
Geological Structure ◽  
Upper Permian ◽  
Salt Deposit ◽  
Potential Sources ◽  
Salt Deposits

The Polkowice-Sieroszowice Mine the KGHM Polska Miedź S.A. uses the georadar method to recognize the geological structure of the Zechstein (Upper Permian) Oldest Halite rock salt deposits (Na1). The incentive to use the georadar was the occurrence of a gas risk in mining excavations. This method is ideal for locating anhydrite blocks, that are potential sites of hydrogen sulphide accumulation, and is helpful in determining the top and base of the salt deposits. In the tests, 100 MHz and 30 MHz antennas were used, which reached the ranges of 40 m and 60 m and resolutions of 0.25 m and 1.0 m, respectively. The profiling with use of a georadar was performed in research boreholes and along the floors of excavation drifts.

scholarly journals Geological model of Lobodice underground gas storage facility based on 3D seismic interpretation

2016 ◽  
Vol 46 (2) ◽  
pp. 125-135
Author(s):  
Lukáš Kopal ◽  
Pavel Čížek ◽  
Ján Milička
Keyword(s):  
Field Data ◽  
Gas Storage ◽  
Geological Structure ◽  
Seismic Survey ◽  
Geological Model ◽  
Storage Facility ◽  
3D Seismic ◽  
Underground Gas Storage ◽  
The Czech Republic ◽  
Carpathian Foredeep

Abstract The Lobodice underground gas storage (UGS) is developed in a natural aquifer reservoir located in the Central Moravian part of the Carpathian Foredeep in the Czech Republic. In order to learn more about the UGS geological structure a 3D seismic survey was performed in 2009. The reservoir is rather shallow, 400–500 m below the surface. This article describes the process workflow from the 3D seismic field data acquisition to the creation of the geological model. The outcomes of this workflow define the geometry of the UGS reservoir, its tectonics and the sealing features of the structure. Better geological knowledge of the reservoir will reduce the risks involved in the localization of new wells for increasing UGS withdrawal rates.

scholarly journals ANALYSIS OF FRACTION CONTENTS IN ROCK SCRATCH TESTS FOR ESTIMATING THE ANGLE OF INTERNAL FRICTION FOR THE SEDIMENTARY COVER OF THE KOVYKTA FIELD

2021 ◽  
Vol 12 (3S) ◽  
pp. 748-753
Author(s):  
K. V. Toropetsky ◽  
G. A. Borisov ◽  
A. S. Smirnov ◽  
A. V. Nosikov
Keyword(s):  
Internal Friction ◽  
Sedimentary Cover ◽  
Geological Structure ◽  
Seismic Survey ◽  
Southeastern Part ◽  
Lower Paleozoic ◽  
Angle Of Internal Friction ◽  
Granulometric Analysis ◽  
Complex Geological Structure ◽  
Scratch Tests

The article describes the possibility of using the granulometric analysis of rock cuttings formed in controlled core scratching tests to estimate the angle of internal friction.The study object is the Kovykta gas-condensate field (GCF) that occupies a wide area in the southeastern part of the Irkutsk amphitheater of the Siberian platform. This uniquely complex geological structure holds significant reserves of hydrocarbons. Its sedimentary cover is composed of the Vendian – lower Paleozoic and partly Riphean formations. Their total thickness exceeds 6000 m, as estimated from the new seismic survey data [Vakhromeev et al., 2019].The sedimentary cover of the Kovykta GCF has been studied by surface and borehole geophysical techniques, remote sensing and geostructural methods, in combination with the tectonophysical approach [Seminsky et al., 2018] based on drilling data, including standard and special core sampling data.

scholarly journals SALT PROCESSING AT THE NAKHICHEVAN SALT DEPOSIT

2021 ◽  
Vol 07 (03) ◽  
pp. 35-40
Author(s):  
Jeyhun Shirinov Jeyhun Shirinov
Keyword(s):  
Rock Salt ◽  
New Technologies ◽  
Ventilation System ◽  
Physical And Mechanical Properties ◽  
Animal Husbandry ◽  
Geological Structure ◽  
Salt Deposit ◽  
New Production ◽  
North West ◽  
Field Development

One of the topical issues is the study of the formation conditions, geological structure, chemical composition and methods of development of the "Duzdag" salt deposit, formed in the Babek region of the Nakhchivan depression on the territory of Azerbaijan, in order to meet the salt needs of the population. The field is divided into two sections: southern - Nakhchivan and Sust, located 4.5 km north-west of it. The physical and mechanical properties of both sections are close to each other. Losses are allowed during field development due to the fact that salt layers alternate with clay layers. The constantly growing demand for salt has predetermined the need to develop more advanced and progressive production methods based on the mechanization of technological processes, the use of new technologies and world experience. Depending on the formation of salt deposits, different methods of salt extraction are used in world practice. The main method of production of table salt in the world should be its extraction in the form of a solution and evaporation in the sun. The share of each of these methods is about 35%, and about 30% of the salt is extracted from an underground mine. The productive layer of the Nakhchivan rock salt deposit is 93-95% halite and is of high quality. The excess content of clay minerals in the field forces them to be used only in animal husbandry. Frosts drilled in the Nakhchivan rock salt deposit can be widely used in the treatment of liver diseases. The mountain has 130 million tons of natural salt reserves that are effective in treating respiratory ailments. Since the ice is horizontal, patients adapt to the underground part. To open new production facilities and treatment facilities in Duzdag, it is necessary to continue the installation of equipment that meets modern standards, the introduction of mines into a fully automated, controlled technological regime, equipped with a modern ventilation system. Keywords: Nakhchivan salt deposit, processing methods, salt beds.

scholarly journals SOUTH NATUNA BASIN RECONFIGURATION BASED ON RECENT SEISMIC AND GRAVITY SURVEYS

2019 ◽  
Vol 42 (2) ◽  
pp. 65-71
Author(s):  
Tatang Padmawidjaja ◽  
Yusuf Iskandar ◽  
Andy Setyo Wibowo ◽  
Eko Budi Lelono
Keyword(s):  
Seismic Data ◽  
Gravity Data ◽  
Sedimentary Rocks ◽  
Geological Structure ◽  
Seismic Survey ◽  
Seismic Region ◽  
Seismic Line ◽  
Geological Information ◽  
Survey Results ◽  
Basin Area

The Geological Survey Center has conducted a seismic survey in the southern Natuna Sea region to obtain geological information below relating to the potential energy resources of the area. The area research is located in the western part and outside the Singkawang Basin area (BG, 2008), which is separated by a Metamorf ridge. 2D seismic survey results show 3 different rock units, namely shallow marine sedimentary rocks, tertiary sedimentary rocks and pre-Tertiary sedimentary rocks, with pre-Tertiary sediment depths of less than 2000 ms. Interpretation of seismic data shows the pattern of graben structures that form sub-basins. strong refl ectors seen in seismic record can distinguish pre-rift, syn-rift and post-rift deposits. There are 2 wells, namely Datuk 1X and Ambu 1X. Datuk 1X has a depth of 1187 meters, and The Ambu 1X has a depth of 880 meters that is crossed by a seismic line. Both drilling has obtained Tertiary aged sandstone that covers pre-Tertiary bedrock.Gravity anomaly data in the seismic region shows anomaly values between 10 to 54 mgal which form the anomaly ridge and basinThe ridge anomaly extends as an anticline, while the anomaly basin also rises to form a syncline. Sincline and anticline trending southwest - southeast, with widening and narrowing patterns.Based on its geological model, the depth of the sediment is relatively shallow between 1500 to 2000 meters. While the integration between seismic, gravity and geomagnetic data shows the discovery of new basins that have never been described before.Finally, the integration of seismic and gravity data succeed discovers a new basin which has never been delineated before. In addition, it shows the continuity of the regional geological structure spanning from the studied area to the West Natuna Basin which is well known to be rich in hydrocarbon potential.

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