The Value of Seismic Data in Conventional and Unconventional Fields

2021 ◽  
Author(s):  
Nawaf Alghamdi ◽  
Hamad Alghenaim
Keyword(s):  
Saudi Arabia ◽  
Seismic Data ◽  
Net Present Value ◽  
Positive Impact ◽  
3D Seismic ◽  
Seismic Processing ◽  
High Reward ◽  
Seismic Acquisition ◽  
The Republic ◽  
Conventional Field

Abstract The paper illustrates the value of seismic data in different environments after assessing the benefits and costs of processes such as seismic acquisition, seismic processing and seismic interpretation. Global examples from conventional and unconventional fields are discussed to show how seismic data plays a significant role in determining low-risk and high-reward wells and also eliminating the high-risk and low-reward wells. This paper shows an example of a conventional field in the state of Kansas, USA, where the net present value (NPV) increased by more than 17 times when 3D seismic data was acquired, while in an unconventional field the commercial success rate rose from 30% to 70% due to 3D seismic acquisition. However, two offshore fields in the Republic of Trinidad and Tobago are discussed to show that the NPV as impacted by advanced seismic processing was more than 111 ($M). Another example comes from Viking Field, a conventional field in Canada, where the NPV was increased from 3800 ($M) to 5000 ($M) when the seismic data was re-processed. Furthermore, the value of investing in seismic data was investigated and quantified by comparing two synthetically modeled scenarios in Saudi Arabia. Overall, the four examples from North America, Central America and Saudi Arabia illustrate that investment in seismic data has a positive impact on both conventional and unconventional fields. That provides strong evidence to encourage more investments in geophysical technologies.

3D surface-related multiple elimination using parabolic sparse inversion

Geophysics ◽  
2006 ◽  
Vol 71 (6) ◽  
pp. V145-V152 ◽  
Author(s):  
Ketil Hokstad ◽  
Roger Sollie
Keyword(s):  
Seismic Data ◽  
Alternative Formulation ◽  
Practical Implementation ◽  
3D Seismic ◽  
Systems Of Equations ◽  
Production Scale ◽  
Seismic Acquisition ◽  
Sparse Inversion ◽  
Multiple Elimination ◽  
3D Seismic Data

The basic theory of surface-related multiple elimination (SRME) can be formulated easily for 3D seismic data. However, because standard 3D seismic acquisition geometries violate the requirements of the method, the practical implementation for 3D seismic data is far from trivial. A major problem is to perform the crossline-summation step of 3D SRME, which becomes aliased because of the large separation between receiver cables and between source lines. A solution to this problem, based on hyperbolic sparse inversion, has been presented previously. This method is an alternative to extensive interpolation and extrapolation of data. The hyperbolic sparse inversion is formulated in the time domain and leads to few, but large, systems of equations. In this paper, we propose an alternative formulation using parabolic sparse inversion based on an efficient weighted minimum-norm solution that can be computed in the angular frequency domain. The main advantage of the new method is numerical efficiency because solving many small systems of equations often is faster than solving a few big ones. The method is demonstrated on 3D synthetic and real data with reflected and diffracted multiples. Numerical results show that the proposed method gives improved results compared to 2D SRME. For typical seismic acquisition geometries, the numerical cost running on 50 processors is [Formula: see text] per output trace. This makes production-scale processing of 3D seismic data feasible on current Linux clusters.

Slicing and dicing HR seismic acquisition: Varied approaches to delivery of high-resolution 3D seismic data volumes for drilling-hazard studies

2015 ◽  
Vol 34 (4) ◽  
pp. 380-388 ◽  
Author(s):  
Andrew W. Hill ◽  
Adeyemi Arogunmati ◽  
Gareth A. Wood ◽  
Duncan Attoe ◽  
Mike Fiske ◽  
...  
Keyword(s):  
High Resolution ◽  
Seismic Data ◽  
3D Seismic ◽  
Seismic Acquisition ◽  
3D Seismic Data

scholarly journals 3-D Land Seismic Acquisition in Saudi Arabia

GeoArabia ◽  
1996 ◽  
Vol 1 (4) ◽  
pp. 511-528
Author(s):  
Richard Hastings-James ◽  
Kamal M. Al-Yahya
Keyword(s):  
Saudi Arabia ◽  
Cost Effectiveness ◽  
Data Quality ◽  
Seismic Data ◽  
Sampling Strategy ◽  
Source Point ◽  
Universal Approach ◽  
Saudi Aramco ◽  
Seismic Acquisition ◽  
The Cost

ABSTRACT Between 1991 and 1996, Saudi Aramco has acquired more than 8,500 square kilometers of 3-D seismic data in Saudi Arabia. During this time, a universal approach to 3-D acquisition has been developed. The resulting acquisition schemes use a dense source point grid with a low sweep effort per source point, and a high number of recorded channels distributed over a large surface aperture. This sampling strategy results in high fold data. Cost-effectiveness is achieved by ensuring that the source and receiver effort are balanced. Comparisons have shown that increases in surface aperture and fold, cross-line fold in particular, improve the data quality significantly at a marginal increase in cost. The cost per unit of data is made significantly lower even if the cost per unit of time may increase.

scholarly journals Optimized Characterization of Gas Chimneys Based on Special Seismic Processing

2019 ◽  
Vol 37 (4) ◽  
Author(s):  
José Paulo Goulart ◽  
David Castro ◽  
Wander Amorim
Keyword(s):  
Seismic Data ◽  
Seismic Signal ◽  
Low Frequencies ◽  
Important Indicator ◽  
Seismic Processing ◽  
Gas Chimney ◽  
Seismic Acquisition ◽  
Seismic Sections ◽  
Gas Chimneys ◽  
Parnaíba Basin

ABSTRACT A new computational methodology was developed to facilitate the interpretation of gas chimneys in seismic sections by analyzing the frequency spectrum of the seismic signal in the Hilbert Domain. Gas chimneys are structures associated with the migration of hydrocarbons or free gas, causing vertical chaotic disturbances in the seismic data. Its occurrence in oil reservoirs is considered an important indicator of the presence of an active petroleum system and its mapping is useful to reduce exploratory risks, increasing the probability of success of the pioneer wells. Standard seismic processing does not favor the recognition of gas chimneys, since their characteristic seismic signature is treated as noise and the low frequencies are strongly attenuated already in the period of the seismic acquisition. The set of reflections is calculated to enhance the low frequencies, making the gas chimneys easily identifiable in the seismic sections where they were not previously even perceived. The special processing flow was applied to seismic data from the Parnaíba Basin “(NE Brazil). This Paleozoic basin is especially rich in gas chimneys, which were favored by transcurrent tectonics associated with the Transbrasiliano Lineament. The gas chimneys interpretation could be validated by the observation of correlated seismic, topographic and geochemical features.KEYWORDS: special processing, gas chimney, exploratory risk, Parnaíba Basin. RESUMO. Uma nova metodologia computacional foi desenvolvida para facilitar a interpretação de chaminés de gás em seções sísmicas por meio da análise do espectro de frequência do sinal sísmico no Domínio de Hilbert. Chaminés de gás são estruturas associadas à migração de hidrocarbonetos ou gás livre, provocando perturbações caóticas verticais no dado sísmico. Sua ocorrência em reservatórios petrolíferos é considerada um importante indicador da presença de um sistema petrolífero ativo e seu mapeamento é útil para reduzir os riscos exploratórios, aumentando a probabilidade de sucesso dos poços pioneiros. O processamento sísmico padrão não favorece o reconhecimento das chaminés de gás, uma vez que a sua assinatura sísmica característica é tratada como ruído e as baixas frequências são fortemente atenuadas já no período da aquisição sísmica. O conjunto de reflexões é calculado para realçar as baixas frequências, tornando as chaminés de gás facilmente identificáveis nas seções sísmicas onde antes não eram nem percebidas. O processamento especial foi aplicado em dados sísmicos da Bacia do Parnaíba. Esta bacia paleozoica é especialmente rica em chaminés de gás, cuja presença foi favorecida pela tectônica transcorrente associada ao Lineamento Transbrasiliano. As chaminés de gás interpretadas puderam também ser validadas pela observação de feições sísmicas, topográficas e geoquímicas correlatas.Palavras-chave: processamento especial, chaminé de gás, risco exploratório, Bacia do Parnaíba.

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