Multi-scale fracture prediction and characterization method of a fractured carbonate reservoir

Zhang, Xiaoxia; Yu, Jiajie; Li, Nianyin; Wang, Chao

doi:10.1007/s13202-020-01033-w

Cited by 12 publications

(3 citation statements)

References 20 publications

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“…The variance attribute is a seismic attribute that describes the variability of seismic amplitudes in neighboring seismic traces. It is more sensitive to fractures caused by faults with strong discontinuities and is suitable for identifying faults at medianscale (Zhang et al, 2021). Curvature can provide information about the spatial distribution of structural features in a rock formation, and is most sensitive to fractures developed by fold; it is suitable for identifying large-scale fractures (Al- Dossary and Marfurt, 2006).…”

Section: Composite Attribute Building and Fracture Identificationmentioning

confidence: 99%

DFN modelling constrained by multiple seismic attributes using the steering pyramid technology

Wang,

Xu,

et al. 2023

Front. Earth Sci.

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Fracture modelling is essential for understanding fluid flow in fractured hydrocarbon reservoirs, particularly in the phase of production; however, traditional discrete fracture network (DFN) modelling methods lack constraints that reflect characteristics of fracture development. Fractures or fracture networks exhibit a high degree of randomness; as such, it is difficult to model fracture characteristics. This paper proposes a new approach for DFN modelling constrained by seismic attributes. Firstly, the steerable pyramid method is adopted to improve seismic data resolution; secondly, multiple seismic attributes are extracted and combined into a composite attribute to characterize fracture spatial distribution; finally, a DFN modelling method is established by using the composite attribute as a location constraint. To verify the effectiveness of the approach, a case study is conducted in the Bonan Depression, in East China. The results show that, compared with the traditional DFN modelling methods, the DFN modelling with the location constraint create a more realistic fracture model which accurately reflects fracture distribution characteristics. The application demonstrates the potential of wide application prospects in fractured reservoirs.

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Section: Composite Attribute Building and Fracture Identificationmentioning

confidence: 99%

DFN modelling constrained by multiple seismic attributes using the steering pyramid technology

Wang,

Xu,

et al. 2023

Front. Earth Sci.

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“…Several studies have linked different karst development to the gradual and progressive enlargement of conductive fractures and faults which facilitate the flow of surface and deep-source fluids (Kacaroglu 1999, Diabat et al 2015. This dissolution in the carbonate reservoirs controls the size of pores, which may vary from small micro-scale cracks to meter-scale cave features (Xiaoxia et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Paleokarst features in the Aptian carbonates of the Barra Velha Formation, Santos Basin, Brazil

Nworie,

Chinelatto,

Vidal

2023

Braz. J. Geol.

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Seismic data, borehole image logs, and conventional well logs were used to investigate the distribution and characteristics of paleokarst features in the Aptian carbonates of the Barra Velha Formation in a pilot area of the Santos Basin, Brazil. Multiple seismic attributes were used to enhance details on the seismic data and highlight key seismic parameters including strata deformation and geometry, continuity of seismic events, and fault patterns. The study found that karst structures are controlled by faults and fractures along structural highs, which served as a conduit for the flow of dynamic fluids that dissolved the carbonate materials. Several closed, circular depressions and bright spots identified in the northeastern portion of the study area represent possible sinkhole structures. Epigenic and hypogenic processes due to the action of meteoric water, hydrothermal activity, and intra-formation acidity along regional unconformities in the Barremian-Aptian may have been responsible for the dissolution. Limitations of this study are related to the difficulty of integrating multiple datasets with various scales. However, the higher confidence for the occurrence of the karst features is provided by borehole images at the sub-seismic scale. The findings of this study hold significant relevance for the strategic planning of energy development and carbon sequestration initiatives in the Brazilian continental margins, thereby aiding in informed decision-making.

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“…However, they did not generate a 3D model to display these parameters across the field. Fracture modeling in this complex structural basin reveals how faults and fractures impact reservoir properties and production rates (Zhao et al 2014;Xiaoxia et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Discrete fracture modeling by integrating image logs, seismic attributes, and production data: a case study from Ilam and Sarvak Formations, Danan Oilfield, southwest of Iran

Hosseinzadeh

Kadkhodaie

Wood

et al. 2022

J Petrol Explor Prod Technol

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Understanding the fracture patterns of hydrocarbon reservoirs is vital in the Zagros area of southwest of Iran as they are strongly affected by the collision of the Arabian and Iranian plates. It is essential to evaluate both primary and secondary (fracture) porosity and permeability to understand the fluid dynamics of the reservoirs. In this study, we adopted an integrated workflow to assess the influence of various fracture sets on the heterogeneous carbonate reservoir rocks of the Cenomanian–Santonian Bangestan group, including Ilam and upper Sarvak Formations. For this purpose, a combination of field data was used including seismic data, core data, open-hole well-logs, petrophysical interpretations, and reservoir dynamic data. FMI interpretation revealed that a substantial amount of secondary porosity exists in the Ilam and Sarvak Formations. The upper interval of Sarvak 1-2 (3491 m to 3510 m), Sarvak 1-3 (3530 m to 3550 m), and the base of Sarvak 2-1 are the most fractured intervals in the formation. The dominant stress regime in the study area is a combination of compressional and strike-slip system featuring reverse faults with a NW–SE orientation. From the depositional setting point of view, mid-ramp and inner-ramp show a higher concentration of fractures compared to open marine environment. Fracture permeability was modeled iteratively to establish a realistic match with production log data. The results indicate that secondary permeability has a significant influence on the productivity of wells in the study area.

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Multi-scale fracture prediction and characterization method of a fractured carbonate reservoir

Cited by 12 publications

References 20 publications

DFN modelling constrained by multiple seismic attributes using the steering pyramid technology

DFN modelling constrained by multiple seismic attributes using the steering pyramid technology

Paleokarst features in the Aptian carbonates of the Barra Velha Formation, Santos Basin, Brazil

Discrete fracture modeling by integrating image logs, seismic attributes, and production data: a case study from Ilam and Sarvak Formations, Danan Oilfield, southwest of Iran

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