scholarly journals Analysis of Seismic Methods Used for Subsea Hydrocarbon Exploration

2020 ◽  
Vol 58 (1) ◽  
pp. 77-89
Author(s):  
Ivan Birin ◽  
Lovro Maglić
Keyword(s):  
Seismic Waves ◽  
Seismic Station ◽  
Hydrocarbon Exploration ◽  
Seismic Survey ◽  
Seismic Exploration ◽  
Seismic Arrays ◽  
Seismic Methods ◽  
Subsurface Layers ◽  
Hydrocarbon Fields ◽  
Marine Seismic

Subsea hydrocarbon exploration comprises detection and estimation of shape, depth, volume and other physical properties of hydrocarbon fields within the Earth’s subsurface layers. Marine seismic survey is a process that generally includes sending seismic waves into seabed and recording the intensity and travel time of reflected seismic waves to determine the subsurface features of the Earth. Different methods, equipment and techniques are used to conduct a survey, from sea surface seismic arrays to seabed local seismic station networks. In this paper different widely used seismic methods are presented, together with their advantages and drawbacks. Furthermore, new methods that are being developed and tested for future approach to more advanced and efficient seismic exploration are presented.

scholarly journals Computer model of seismic waves vertical velocity distribution for central part of the Dniprovsko-Donetsk depression

2013 ◽  
pp. 62-70
Author(s):  
P. Zagorodnyuk ◽  
G. Lisny ◽  
V. Ryumin ◽  
E. Ustenko
Keyword(s):  
Computer Model ◽  
Vertical Velocity ◽  
Seismic Waves ◽  
Oil And Gas ◽  
New Technologies ◽  
Seismic Survey ◽  
Seismic Exploration ◽  
Donets Basin ◽  
Velocity Anisotropy ◽  
Velocity Modeling

The article states the principles of layered media velocity modeling and the results of computer modeling of the value distribution of the vertical velocity of seismic waves in the central part of the Dnieper-Donets Basin. The computer model is used to integrate the seismic survey data, and to enhance the efficiency of seismic exploration for oil and gas. It is achieved through the application of new technologies for data processing with respect to velocity anisotropy, as well as through the use of traditional approaches.   

scholarly journals Application of scattered and emitted seismic waves for improving efficiency of exploration and development of hydrocarbon fields

2017 ◽  
pp. 54-59
Author(s):  
O. L. Kouznetsov ◽  
V. G. Gaynanov ◽  
A. A. Radwan ◽  
I. A. Chirkin ◽  
E. G. Rizanov ◽  
...  
Keyword(s):  
Seismic Waves ◽  
Oil And Gas ◽  
Seismic Exploration ◽  
Side View ◽  
Gas Wells ◽  
Seismic Location ◽  
Hydrocarbon Fields ◽  
Observation Selection ◽  
Hydrocarbon Deposits ◽  
Exploration And Development

The success of drilling oil and gas wells is largely determined by the presence of high HC-content and permeability of the reservoir at the point of penetration. For a reliable study of these characteristics should be used microseismic emission and the scattered reflection waves. For their observation, selection and positioning in geomedium we developed technology “Seismic Location of Emission Centers” and “Side-View Seismic Location”, which significantly extend the range of problems solved during seismic exploration of hydrocarbon deposits. Examples of application of these technologies in the exploration and development of hydrocarbon deposits are provided.

scholarly journals Comparison of site effect values obtained by HVSR and HVSRN methods for single-station measurements in Tarnówek, South-Western Poland.

2016 ◽  
Vol 5 (1) ◽  
pp. 18-27 ◽  
Author(s):  
Maciej J. Mendecki ◽  
Barbara Bieta ◽  
Mateusz Mateuszów ◽  
Paweł Suszka
Keyword(s):  
Love Wave ◽  
Seismic Waves ◽  
Seismic Station ◽  
Spectral Ratio ◽  
Site Effect ◽  
Single Station ◽  
Subsurface Layers ◽  
Loose Sediments ◽  
Hvsr Technique ◽  
The Village

Abstract This study compares the HVSR technique (Horizontal to Vertical Spectral Ratio), based on seismic event records, and the HVSRN technique (Horizontal to Vertical Spectral Ratio of Noise) using seismic noise registrations. Both methods allow us to study the amplification phenomenon of a horizontal component of seismic waves when the waves reach loose sediments in subsurface layers. The seismic data were measured at a three-component single seismic station located in the village of Tarnówek, in the Legnica-Głogów Copper District. The results of the study demonstrate that average HVSRN and HVSR maxima can be distinguished: for periods approximately 3.78 s (H/V = 6.2) and 3.969 s (H/V = 8.98) respectively. The evaluated share of the Rayleigh wave component in the recorded values was β = 0.58 and it can be suggested that the Love wave share in surface motion was insignificant. The Love wave share remains unknown.

Development of 3-D seismic exploration technology for deep nickel‐copper deposits—A case history from the Sudbury basin, Canada

Geophysics ◽  
2000 ◽  
Vol 65 (6) ◽  
pp. 1890-1899 ◽  
Author(s):  
Bernd Milkereit ◽  
E. K. Berrer ◽  
Alan R. King ◽  
Anthony H. Watts ◽  
B. Roberts ◽  
...  
Keyword(s):  
Direct Detection ◽  
Mineral Exploration ◽  
Massive Sulfide ◽  
Seismic Survey ◽  
Seismic Exploration ◽  
Seismic Scattering ◽  
Sudbury Igneous Complex ◽  
Seismic Methods ◽  
Seismic Experiment ◽  
Nickel Copper

Following extensive petrophysical studies and presite surveys, the Trill area of the Sudbury basin was selected for conducting the first 3-D seismic survey for mineral exploration in North America. The 3-D seismic experiment confirms that in a geological setting such as the Sudbury Igneous Complex, massive sulfide bodies cause a characteristic seismic scattering response. This provides an excellent basis for the direct detection of massive sulfides by seismic methods. The feasibility study suggests that high‐resolution seismic methods offer a large detection radius in the order of hundreds to thousands of meters, together with accurate depth estimates.

scholarly journals S-wave experiments for the exploration of a deep geothermal carbonate reservoir in the German Molasse Basin

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Britta Wawerzinek ◽  
Hermann Buness ◽  
Hartwig von Hartmann ◽  
David C. Tanner
Keyword(s):  
Upper Jurassic ◽  
Carbonate Reservoir ◽  
P Wave ◽  
Seismic Survey ◽  
Seismic Exploration ◽  
Molasse Basin ◽  
S Wave ◽  
Induced Earthquakes ◽  
Conversion Point ◽  
Facies Classification

AbstractThere are many successful geothermal projects that exploit the Upper Jurassic aquifer at 2–3 km depth in the German Molasse Basin. However, up to now, only P-wave seismic exploration has been carried out. In an experiment in the Greater Munich area, we recorded S-waves that were generated by the conventional P-wave seismic survey, using 3C receivers. From this, we built a 3D volume of P- to S-converted (PS) waves using the asymptotic conversion point approach. By combining the P-volume and the resulting PS-seismic volume, we were able to derive the spatial distribution of the vp/vs ratio of both the Molasse overburden and the Upper Jurassic reservoir. We found that the vp/vs ratios for the Molasse units range from 2.0 to 2.3 with a median of 2.15, which is much higher than previously assumed. This raises the depth of hypocenters of induced earthquakes in surrounding geothermal wells. The vp/vs ratios found in the Upper Jurassic vary laterally between 1.5 and 2.2. Since no boreholes are available for verification, we test our results against an independently derived facies classification of the conventional 3D seismic volume and found it correlates well. Furthermore, we see that low vp/vs ratios correlate with high vp and vs velocities. We interpret the latter as dolomitized rocks, which are connected with enhanced permeability in the reservoir. We conclude that 3C registration of conventional P-wave surveys is worthwhile.

Looking back: a history of marine seismic exploration

1999 ◽  
Vol 18 (1) ◽  
pp. 36-38 ◽  
Author(s):  
D.D. Sternlicht
Keyword(s):  
Seismic Exploration ◽  
History Of ◽  
Marine Seismic ◽  
Looking Back

scholarly journals Improving Accuracy in Studying the Interactions of Seismic Waves with Bottom Sediments

2021 ◽  
Vol 9 (2) ◽  
pp. 229
Author(s):  
Georgy Mitrofanov ◽  
Nikita Goreyavchev ◽  
Roman Kushnarev
Keyword(s):  
Bottom Sediments ◽  
Seismic Waves ◽  
Wide Frequency Range ◽  
Quality Of Data ◽  
High Quality ◽  
Relative Characteristic ◽  
Seabed Evolution ◽  
Marine Seismic ◽  
Very High

The emerging tasks of determining the features of bottom sediments, including the evolution of the seabed, require a significant improvement in the quality of data and methods for their processing. Marine seismic data has traditionally been perceived to be of high quality compared to land data. However, high quality is always a relative characteristic and is determined by the problem being solved. In a detailed study of complex processes, the interaction of waves with bottom sediments, as well as the processes of seabed evolution over short time intervals (not millions of years), we need very high accuracy of observations. If we also need significant volumes of research covering large areas, then a significant revision of questions about the quality of observations and methods of processing is required to improve the quality of data. The article provides an example of data obtained during high-precision marine surveys and containing a wide frequency range from hundreds of hertz to kilohertz. It is shown that these data, visually having a very high quality, have variations in wavelets at all analyzed frequencies. The corresponding variations reach tens of percent. The use of the method of factor decomposition in the spectral domain made it possible to significantly improve the quality of the data, reducing the variability of wavelets by several times.

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.

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