Characterizing the Seismic Response of Naturally Fractured Basement Reservoir in Sumatra Area: Towards an Efficient Seismic Exploration Strategy

2021 ◽  
Author(s):  
P. D. Wardaya
Keyword(s):  
Oil And Gas ◽  
Graphics Processing Unit ◽  
Geophysical Methods ◽  
Computing System ◽  
Gas Production ◽  
Seismic Survey ◽  
Seismic Exploration ◽  
Fracture Plane ◽  
Processing Unit ◽  
Fracture Properties

Although only contributes few to the total oil and gas production, fractured basement reservoir is one of the important unconventional reservoirs in Indonesia. It was estimated that the gas reserve in basement in South Sumatra is about 6 TCF (trillion cubic feet). Most of the existing geophysical methods is not intended to explore events within the basement. In fact, majority of basement reservoir discovery was coincident. Despite its significant contribution to Indonesia’s gas production, the exploration success story in the fractured basement play is still poorly documented. The challenges and difficulties in their characterization are higher than the conventional reservoir. This study presents an integrated geological and geophysical approach to improve the outcome of seismic imaging of the fractured basement reservoir. A comprehensive geological study and geophysical modelling were conducted to provide an efficient strategy for designing an optimum seismic survey in imaging the fractures within the basement. Both surface and subsurface data were thoroughly analyzed to yield a reliable representation of the subsurface fracture model at basement level. Outcrop sample analysis combined with aerial remote sensing analysis were performed as input to digital outcrop modelling. The modelling was intended to provide information about fracture orientation, length, and density. This will provide a fracture property in the surface which is related to the fracture properties in subsurface. The resulting fracture properties was then used as an input to evaluate the seismic wave response during its propagation in the reservoir. Seismic modelling has been done using a 2D finite-difference full wavefield approach in a Graphics Processing Unit (GPU) accelerated computing system. We observe how fracture properties affect the propagating seismic wavefield. Wave scattering is observed more prominently around the fracture tip when the fracture plane is orthogonal to wavefield direction.

scholarly journals Role of multiple reflections in the formationof wave field in the cretaceous successions of the Middli Kura depression in Azerbaijan

2021 ◽  
Vol 43 (3) ◽  
pp. 123-134
Author(s):  
T. R. Akhmedov ◽  
T. Kh. Niyazov
Keyword(s):  
Wave Field ◽  
Upper Cretaceous ◽  
Oil And Gas ◽  
Geophysical Methods ◽  
Geological Structure ◽  
Gas Content ◽  
Seismic Exploration ◽  
Time Interval ◽  
Multiple Reflections ◽  
Seismic Sections

The article is devoted to the elucidation of the nature of the wave field recorded below the supporting-dominant seismic horizon «P» in the Middle Kura depression of Azerbaijan. A brief overview of the work carried out here is given; it is indicated that some geologists and geophysicists of our country, in our opinion, mistakenly assume that the observed wave field below the specified horizon is formed mainly by multiple reflections. Since the introduction of the common depth point method into the practice of seismic exploration, individual areas of the Middle Kura depression in Azerbaijan, including the Yevlakh-Agjabedi trough, have been repeatedly studied with varying degrees of frequency tracking. On the basis of this, a fairly large number of promising structures have been identified and mapped. But the structure of the Mesozoic, in particular the deposits of the Upper Cretaceous, still remains insufficiently studied. The study of the geological structure of the Mesozoic sediments, which are considered promising in terms of oil and gas content, is an urgent geological task; exploration work was carried out in the studied areas of the Middle Kura depression using a complex of geophysical methods at the modern technical and methodological level and new results were obtained. The constructed seismic sections show a dynamically pronounced and well-traceable seismic horizon corresponding to the Mesozoic surface and located deeper than it, relatively weak, short, discontinuous reflective boundaries that characterize the structure within the Mesozoic deposits. The studies carried out on the basis of modeling and velocity analysis made it possible to prove that the wave field in the time interval corresponding to the Mesozoic deposits owes its origin to intermittent single reflections from volcanic-carbonate deposits of the Upper Cretaceous age.

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 Integrated approach to the typification and localization of deposits of the anomalous section of the Bazhenov formation of the Frolov oil and gas region

2021 ◽  
Vol 6 (4) ◽  
pp. 12-21
Author(s):  
Olga S. Generalenko ◽  
Anastasia Y. Koltsun ◽  
Svetlana I. Isaeva ◽  
Sergey L. Tarasov ◽  
Vladimir A. Orlov
Keyword(s):  
Oil And Gas ◽  
Integrated Approach ◽  
Wave Pattern ◽  
Research Area ◽  
Seismic Survey ◽  
Seismic Exploration ◽  
Borehole Data ◽  
Bazhenov Formation ◽  
North West ◽  
The Core

Introduction. The subject of the study of this work is the deposits of the anomalous section of the Bazhenov formation (ASB) of Western Siberia, the disturbed occurrence of which was recorded by 2D, 3D seismic exploration and borehole data at many fields of the Frolov oil and gas region. The research area unites the company’s assets in the KhMAO and the Tyumen region, which are part of the large hydrocarbon cluster “ZIMA”. Aim. In order to typify various complexes of rocks of the Bazhenov formation and further localization of deposits, a comprehensive core analysis, GIS and seismic studies were performed. Materials and methods. According to the results of lithological study of the core and petrophysical interpretation of logging diagrams, have been identified various types of rocks in the interval of the Bazhenov formation. According to the results of the interpretation of the seismic survey materials, contoured zones that differ in the wave pattern by different coherence of the axes of common phase. The revealed differences in seismic sections compared with borehole data and geological bodies mapped based on the obtained patterns. Results. Based on a comprehensive interpretation of the core, GIS and seismic studies, established the zonality of the distribution of various types of deposits of the Bazhenov formation, the relationship of the development of ASB zones with the introduction of Early Cretaceous sedimentary bodies and showed the introduction of detrital material from the overlying rocks. Conclusions. The authors of the article conclude that the development of anomalous sections of the Bazhenov formation involves several stages of the introduction of landslide bodies of overlying rocks, according to the gradation of Neocomian clinocyclites in the north-west direction. Within the study area, mapped three large landslide bodies in the Bazhenov formation interval, each of which was formed an internal zonality and because of the introduction of rocks from the overlying interval.

scholarly journals Assessment of the facial affiliation of local oil and gas objects based on geophysical data

2021 ◽  
Vol 21 (4) ◽  
pp. 241-247
Author(s):  
Boris A. Golovin ◽  
◽  
Konstantin B. Golovin ◽  
Marina V. Kalinnikova ◽  
Sergey A. Rudnev ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Facies Analysis ◽  
Geophysical Methods ◽  
Well Logging ◽  
Geophysical Data ◽  
Gas Content ◽  
Seismic Exploration ◽  
Core Material ◽  
Genetic Characteristics ◽  
Reservoir Potential

In the established practice of geological exploration for oil and gas conclusions about the facies belonging of the rocks of oil and gas basins and individual exploration areas were made mainly on the basis of the study of core material. Recently for this purpose the results of seismic exploration and well logging have been used. Geophysical methods despite their obvious progress are indirect and intermittent core sampling and incomplete coring make facies analysis difficult. Тhe study of cuttings during the well logging process makes it possible to fill this gap through direct continuous observations along the well section. The use of the whole complex of geophysical methods allows one to mutually compensate for the limitations and disadvantages of each of them and more fully and reliably assess the genetic characteristics and reservoir potential of productive deposits. Sequential accumulation, comparison and analysis of heterogeneous geophysical data make it possible to continuously refine apriori facies models and forecast oil and gas content which ultimately allows to optimize the directions and volumes of drilling.

scholarly journals ПЕРСПЕКТИВЫ НЕФТЕГАЗОНОСНОСТИ СЕВЕРО- АБШЕРОНСКОГО АРХИПЕЛАГА ЮЖНО- КАСПИЙСКОЙ ВПАДИНЫ В СВЯЗИ С ТЕКТОНИЧЕСКИМ РАЗВИТИЕМ СТРУКТУР

2019 ◽  
pp. 16-22
Author(s):  
Насибова Г. Д. ◽  
Мухтарова Х. З.
Keyword(s):  
Oil And Gas ◽  
Deep Structure ◽  
Geophysical Methods ◽  
Seismic Exploration ◽  
The South ◽  
Gas Field ◽  
Foreign Companies ◽  
Oil And Gas Resources ◽  
Hydrocarbon Fields ◽  
Exploration Drilling

Over the past decades, discovery of giant hydrocarbon fields at the depth of above 10 km in the World oceans enables the possibility of identifying oil and gas at great depths of the South Caspian depression (SCD).The main oil and gas resources in this region are associated with the Productive Series (PS) -Red Series (RS) of the Lower Pliocene. Paleogene-Miocene and Mesozoic sediments in the southern Caspian are submerged to great depths, the prospects of their oil and gas potential are associated with the most uplifted tectonic zones.The Northern Absheron, that is considered as one of the promising areas of this region, covers the uplifts zone under the same name that is the most elevated tectonic unit of the South Caspian. The zone under consideration consists of two anticlinal lines, within which about 20 structures have been identified and explored. Currently, about 10 structures are covered by prospecting and exploration drilling and 5 prospective oil and gas structures have been identified: Absheron kupesi, Western Absheron, Novkhany, Ashrafi, Garabakh.Testing of exploration wells on the structures Gilavar, Hali, Arzu, Ashrafi, Mardakan-deniz and Oguz has not been positive. It should be noted that the deep structure of these uplifts is poorly studied by seismic exploration. Detailed integrated geophysical survey at modern technological and methodological levels is necessary to examine the relation of structural plans of sediments of various ages. The prospects oil and gas field exploration are associated with the lower part of the PS, Miocene, Cretaceous and Jurassic.It should be noted that despite negative conclusions of some foreign researchers on non-productiveness of the structures above, in recent years, the data obtained from the results of new geological and geophysical methods give SOCAR the basis to resume exploration drilling without involvement of foreign companies.

scholarly journals DEVELOPING PARALLEL COMPUTING ALGORITHMS USING GPU’S TO DETERMINE OIL AND GAS RESERVES PRESENTED IN THE UPSTREAM (EXPLORATION) SECTOR

2020 ◽  
Author(s):  
Stefan Boodoo ◽  
Ajay Joshi
Keyword(s):  
High Performance ◽  
Oil And Gas ◽  
Gpu Computing ◽  
Graphics Processing Unit ◽  
Reservoir Rock ◽  
Processing Unit ◽  
Potential Wells ◽  
Central Processing ◽  
Rock Formations ◽  
Graphics Processing

Oil and Gas companies keep exploring every new possible method to increase the likelihood of finding a commercial hydrocarbon bearing prospect. Well logging generates gigabytes of data from various probes and sensors. After processing, a prospective reservoir will indicate areas of oil, gas, water and reservoir rock. Incorporating High Performance Computing (HPC) methodologies will allow for thousands of potential wells to be indicative of its hydrocarbon bearing potential. This study will present the use of the Graphics Processing Unit (GPU) computing as another method of analyzing probable reserves. Raw well log data from the Kansas Geological Society (1999-2018) forms the basis of the data analysis. Parallel algorithms are developed and make use of Nvidia’s Compute Unified Device Architecture (CUDA). The results gathered highlight a 5 times speedup using a Nvidia GeForce GT 330M GPU as compared to an Intel Core i7 740QM Central Processing Unit (CPU). The processed results display depth wise areas of shale and rock formations as well as water, oil and/or gas reserves.

scholarly journals Forecasting oil and gas saturation of the section based on the results of seismic survey interpretation using innovative methods on the territory of the Republic of Kazakhstan

2021 ◽  
Vol 3 (2) ◽  
pp. 27-41
Author(s):  
N. V. Амельченко ◽  
D. M. Sobolev ◽  
V. P. Kotov ◽  
S. M. Kaliev
Keyword(s):  
Oil And Gas ◽  
Spectral Characteristics ◽  
Seismic Survey ◽  
Seismic Exploration ◽  
Oil Saturation ◽  
Innovative Methods ◽  
Search Criterion ◽  
The Republic ◽  
Dynamic Processing ◽  
Hydrocarbon Deposit

Seismoacoustic entropy analysis (SAE-analysis) and the method of frequency compositions (MFC) are methods of seismic exploration aimed at solving problems of direct search for hydrocarbons based on the results of seismic exploration in promising areas. Both methods use the seismoacoustic response of a hydrocarbon deposit when interacting with the incident wave front as a search criterion. The location of the deposit is determined through dynamic processing and statistical analysis of the spectral characteristics of the wave field. The article presents the results of the forecast of oil saturation by the methods of MFC and SAE-analysis on the territory of Kazakhstan.

scholarly journals New methods for isolation and mapping of natural reservoirs for underground hydrogen storage in depleted hydrocarbon deposits

2020 ◽  
pp. 3-12
Author(s):  
I.V. Kolokolova ◽  
I.N. Konovalova
Keyword(s):  
Oil And Gas ◽  
Layer Structure ◽  
Geophysical Methods ◽  
Seismic Exploration ◽  
Gas Reservoirs ◽  
Water Contact ◽  
New Methods ◽  
Natural Oil ◽  
Hydrocarbon Deposits ◽  
Underground Hydrogen Storage

The article proposes new methodological techniques for identifying and mapping true and false seals based on the data of geophysical methods, according to the main provisions of the theory of the three-layer structure of natural oil and gas reservoirs. Seismic exploration in combination with well logging makes it possible to control the storage volumes, determine the gas-water contact contour and obtain detailed models of the natural reservoir.

scholarly journals NEW TECHNOLOGIES OF SEISMIC EXPLORATION IN UKRAINE

2021 ◽  
pp. 78-83
Author(s):  
Ivan GAFYCH ◽  
Ievgenii SOLODKYI ◽  
Sergii IARESHCHENKO ◽  
Yurii RENKAS
Keyword(s):  
Oil And Gas ◽  
New Technologies ◽  
New Technology ◽  
Pilot Project ◽  
High Density ◽  
Seismic Survey ◽  
Seismic Exploration ◽  
Mountain Areas ◽  
Oil And Gas Producers ◽  
Field Works

Development of technologies, growth of trends of reducing impact on environment and challenging tasks, which oil and gas producers face, make introduction of new technologies in seismic exploration field unavoidable. As a key tool of prospecting, exploration and reconnaissance of hydrocarbons, seismic exploration is usually restricted by terrain conditions. Urban, wooded and marshy lands, protected areas, river valleys, mountain areas often make seismic exploration impossible or signifi cantly impact its quality and efficiency.   One of the modern trends enabling resolution of the issues related to impact on environment is to switch to cable-free registration systems (wireless seismic), so called low impact seismic. Due to the use of cable-free equipment, this new technology makes it possible to reduce impact on environment during field works, as equipment is delivered to the place of installation with no special heavy machinery involved.  On the other hand, cable-free systems of seismic acquisition allow to resolve complex tasks of exploration and appraisal studies. Firstly, carry out exploration of hard-to-reach territories, including protected environmental areas, which until now remain unexplored or slightly explored. Managing seismic cables in such conditions is very complicated or impossible. Cable-free technologies allow easily resolving such issues due to both minimum impact on environment and simple and quick placement of receivers. Flexibility and easy scaling of wireless seismic adds to its advantages versus conventional survey. Kilometres of wires are not needed, which allows to easily increase the number of receiver channels and conduct high-density full azimuth seismic survey with single seismic receivers at deep structures, thus, significantly increasing quality of the data received.  The pilot project successfully completed at Khoroshivska area by joint efforts of DTEK Oil&Gas LLC and LLC Denimex Geo LLC confi rms in full advantages of wireless solutions revealing new opportunities for the use of seismic exploration at areas previously hard to reach and allowing implementation of high density acquisition projects. 

Prediction of Reservoir Parameters Variation Based on Time-Lapse Seismic Survey

2012 ◽  
Vol 433-440 ◽  
pp. 6370-6374
Author(s):  
Gang Fang ◽  
Xiao Hong Chen ◽  
Jing Ye Li
Keyword(s):  
Oil And Gas ◽  
Time Lapse ◽  
Seismic Inversion ◽  
Gas Production ◽  
Physical Models ◽  
Seismic Survey ◽  
Dynamic Monitoring ◽  
Oil And Gas Production ◽  
Fluid Saturation ◽  
Unconsolidated Sand

Fluid saturation and pressure are two of most important reservoir parameters during oil and gas production scheme adjustment. A method to compute the change of fluid saturation and pressure with multi-parameters regression was presented based on time-lapse seismic inversion data. Rock physical models of unconsolidated sand rock reservoirs were determined according to the real field’s conditions to analyze how seismic attributes change with variation of reservoir parameters. The radial basis function artificial neural network which was trained by this model was used to predict saturation and effective pressure. The predicted results are of high consistency with reservoir numerical simulation, which provide valuable reference for reservoir dynamic monitoring.

Sign in / Sign up

Export Citation Format

Share Document