Fault and fracture study by incorporating borehole image logs and supervised neural network applied to the 3D seismic attributes: a case study of pre-salt carbonate reservoir, Santos Basin, Brazil

Babasafari, Amir Abbas; Chinelatto, Guilherme Furlan; Vidal, Alexandre Campane

doi:10.1080/10916466.2021.2025072

Cited by 21 publications

(9 citation statements)

References 10 publications

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“…Generally, it is hard to describe the small-scale fracture and fractured reservoirs in the deep subsurface [31][32][33]. Owing to the fracture and fractured reservoirs often occurred…”

Section: Description Of Fractured Reservoirmentioning

confidence: 99%

“…Generally, it is hard to describe the small-scale fracture and fractured reservoirs in the deep subsurface [31][32][33]. Owing to the fracture and fractured reservoirs often occurred in the fault damage zone, we use seismic illumination attribute to constrain the envelope of the fault damage zone and the fracture-cave reservoirs.…”

Section: Description Of Fractured Reservoirmentioning

confidence: 99%

“…Due to the tight matrix reservoirs in the deep carbonates, fractured reservoirs are of significant importance in hydrocarbon exploitation in heterogeneous reservoirs [31][32][33]. The fracture network can enhance the permeability by 1-3 orders of magnitude and the fracture-related dissolution porosity by more than 20% in the deep tight reservoirs.…”

Section: Technology Challenges For Fractured Reservoir Exploitationmentioning

confidence: 99%

“…In this way, the "sweet spot" of fractured reservoirs is the favorable target for economic production along the strike-slip fault damage zone. The fractured reservoir has been studied by geological, geophysical and engineering methods, of which the seismic technology plays an important role in the reservoir description [32,33,[36][37][38]. Owing to the intense heterogeneity of fractured reservoirs and low-resolution seismic data, there is still a big challenge in the description of fractured reservoirs in the deep subsurface.…”

Section: Technology Challenges For Fractured Reservoir Exploitationmentioning

confidence: 99%

“…Because the fracture cannot be discriminated by seismic data in the deep subsurface, the envelope of the fault damage zone could be a proxy for fracture imaging in the deep subsurface [31,33]. Moreover, there is still little understanding on the fracture network and its relation with the fractured reservoirs [32]. In addition, some weak fractured outer zones of the fault damage zone could not be imaged by the available seismic method (Figure 9b).…”

Section: Technology Challenges For Fractured Reservoir Exploitationmentioning

confidence: 99%

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The Advances and Challenges of the Ediacaran Fractured Reservoir Development in the Central Sichuan Basin, China

He¹,

Guo²,

Tang³

et al. 2022

Energies

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The largest Precambrian gasfield in China has been found in the central Sichuan Basin. It has been assumed as an Ediacaran (Sinian) mound–shoal, microfacies-controlled, dolomite reservoir. However, the extremely low porosity–permeability and heterogeneous reservoir cannot establish high production by conventional development technology in the deep subsurface. For this contribution, we carried out development tests on the fractured reservoir by seismic reservoir description and horizontal well drilling. New advances have been made in recent years: (1) the prestack time and depth migration processing provides better seismic data for strike-slip fault identification; (2) seismic planar strike-slip structures (e.g., en échelon/oblique faults) and lithofacies offset together with sectional vertical fault reflection and flower structure are favorable for strike–slip fault identification; (3) in addition to coherence, maximum likelihood and steerable pyramid attributes can be used to identify small strike-slip faults and for fault mapping; (4) fusion attributes of seismic illumination and structural tensor were used to find fractured reservoir along fault damage zone; (5) horizontal wells were carried out across the strike-slip fault damage zone and penetrated fractured reservoir with high production. Subsequently, a large strike-slip fault system has been found throughout the central intracratonic basin, and the “sweet spot” of the fractured reservoir along the strike-slip fault damage zone is widely developed to be a new favorable domain for high-production development. There is still a big challenge in seismic and horizontal well technology for the economical exploitation of the deep fractured reservoirs. This practice provides new insight in the deep tight matrix reservoir development.

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“…Generally, it is hard to describe the small-scale fracture and fractured reservoirs in the deep subsurface [31][32][33]. Owing to the fracture and fractured reservoirs often occurred…”

Section: Description Of Fractured Reservoirmentioning

confidence: 99%

Section: Description Of Fractured Reservoirmentioning

confidence: 99%

Section: Technology Challenges For Fractured Reservoir Exploitationmentioning

confidence: 99%

Section: Technology Challenges For Fractured Reservoir Exploitationmentioning

confidence: 99%

Section: Technology Challenges For Fractured Reservoir Exploitationmentioning

confidence: 99%

See 3 more Smart Citations

The Advances and Challenges of the Ediacaran Fractured Reservoir Development in the Central Sichuan Basin, China

He¹,

Guo²,

Tang³

et al. 2022

Energies

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Reservoir Rock Discrimination Based on Integrated Image Logs and Petrographic Analysis: A Case Study from the Early Miocene Nukhul Carbonate, Southern Gulf of Suez, Egypt

Kassem,

Abdel Fattah,

Hassan

et al. 2024

Arab J Sci Eng

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The discrimination of rock types within the limestones and dolostones of the Nukhul Formation in the West Younis Field (Gulf of Suez Basin, Egypt) presents significant challenges due to their multi-scale compositional and diagenetic heterogeneity, diverse pore types, complex microstructures, and limited core data. This study aims to characterize the carbonate reservoir of the Early Miocene sediments and establish distinct reservoir rock types by employing textural analysis, geological interpretations (i.e., structural interpretation, fracture analysis, reservoir characteristics) using advanced imaging tools, and petrophysical measurements to model porosity/permeability profiles across the reservoir. A new dataset was obtained from the latest exploratory well in the West Younis Field, incorporating microresistivity and acoustic image logs, well logs, nuclear magnetic resonance (NMR) tools, and drill cutting petrographic analysis. The integration of these datasets provided a comprehensive understanding of the properties of the Early Miocene carbonate reservoir. Based on image logs, the carbonate facies were divided into four reservoir units. Petrographic evaluation further classified two facies (A and B) based on diagenetic factors controlling reservoir quality. The results revealed the occurrence of multiple phases of dolomitization, which influenced the reservoir quality. Early-stage dolomitization enhanced reservoir quality, while late-stage idiotopic dolomite crystal growth diminished it. The study also provided comprehensive information on the original rock fabric/texture, diagenetic processes, porosity types and origins, as well as the spatial distribution of pores (permeability index) within this complex carbonate reservoir. By employing an integrated technique, this study successfully differentiated the carbonate reservoir into distinct rock types, leading to improved reservoir characterization and field development. Additionally, the findings contribute valuable insights for the development and exploration of the Early Miocene carbonate section in the southern Gulf of Suez.

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A spatio-temporal forecasting method of fracture distribution using dynamically exposed rock images in tunnel: Methodology and application

Li,

Xu,

Pan

et al. 2024

Engineering Geology

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Fault and fracture study by incorporating borehole image logs and supervised neural network applied to the 3D seismic attributes: a case study of pre-salt carbonate reservoir, Santos Basin, Brazil

Cited by 21 publications

References 10 publications

The Advances and Challenges of the Ediacaran Fractured Reservoir Development in the Central Sichuan Basin, China

The Advances and Challenges of the Ediacaran Fractured Reservoir Development in the Central Sichuan Basin, China

Reservoir Rock Discrimination Based on Integrated Image Logs and Petrographic Analysis: A Case Study from the Early Miocene Nukhul Carbonate, Southern Gulf of Suez, Egypt

A spatio-temporal forecasting method of fracture distribution using dynamically exposed rock images in tunnel: Methodology and application

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