Geological and Geomechanical Modeling of the Haynesville Shale: A Full Loop for Unconventional Fractured Reservoirs

Bayer, W. Sebastian; Wunderle, Marcus; Araujo, Ewerton; Alcalde, Rene; Yao, Calvin; Suhy, Fred; Jo, Thomas; Bases, Fleur; Sani, Abu M.; Ma, Yiwei; Bansal, Abhishek; Peterson, Eric W.; Goudge, Rohan; Awasthi, Ankur; Bhatia, Mukul

doi:10.15530/urtec-2016-2460295

Cited by 5 publications

(4 citation statements)

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“…In order to study a regional unconventional play, oil and gas exploration and production companies usually combine multiple 3D seismic surveys into a single project, map the stratigraphic horizons and structural features (e.g. faults) across these surveys in the time domain, and then construct velocity models to convert the horizon surfaces to the depth domain as discussed in Bayer (2016). The next step is to calibrate the horizons using both vertical and horizontal wells.…”

Section: Resultsmentioning

confidence: 99%

Structural and Stratigraphic Modeling Techniques in Shale and Tight Oil Basin Reservoir Studies

Dommisse¹

2022

Preprint

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The validity of regional and basin-wide geomodels of unconventional and tight-oil plays depends on the accuracy and precision of the available structural and stratigraphic frameworks. Integrated reservoir models, combining seismic, log, core, and production data, are critical tools necessary for capturing the basin fill history and for predicting the 3D facies architecture.For researchers, the lack of publicly available 3D seismic surveys is an impediment to creating accurate models of faults and stratigraphic zones. Three approaches were used to overcome this deficit: 1) well log correlation of detailed stratigraphic zones using densely spaced vertical wells; 2) calculation of trend surfaces from thousands of geosteered 3D horizontal well position logs; and 3) residual analysis of regional and local horizontal well trend surfaces to identify faults.Independent data and identification methods were used to confirm the validity of these new surfaces and faults, including 3D seismic interpretations (where available), well log-based fault correlations, and analysis of seismicity. The resulting horizons were used to define the more accurate structure and stratigraphy used in the 3D geocellular models.Examples of the approaches to refining geomodels are illustrated for the main North American unconventional reservoir and tight oil plays, including the Eagle Ford, Bakken, Barnett, Haynesville, Fayetteville, Marcellus, and the Midland and Delaware Basins.

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Section: Resultsmentioning

confidence: 99%

Structural and Stratigraphic Modeling Techniques in Shale and Tight Oil Basin Reservoir Studies

Dommisse¹

2022

Preprint

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“…Table 2 shows a summary of breakdown pressures for cave mines and a case of shale reservoir, using empirical information, poroelastic assumption (Detournay & Cheng 1993) and elastic assumption (Jaeger et al 1976). Based on field studies, a high pore pressure value is considered for Haynesville, and a poroelastic parameter (⅓) typical for sandstones (Bayer et al 2016).…”

Section: Geotechnical Environmentmentioning

confidence: 99%

“…Stress shadow is being extensively studied in the petroleum industry over the time (Sneddon 1945), given its impact in the hydraulic fracturing performance. In the case of Petroleum stress shadow effect can be negative, producing a less effective impact on permeability enhancement (Bayer et al 2016).…”

Section: Stress Shadow Effectmentioning

confidence: 99%

Hydraulic fracturing in cave mining: Opportunities for improvement

Rimmelin¹,

Chitombo²,

Valdivia³

2020

MassMin 2020: Proceedings of the Eighth International Conference &Amp; Exhibition on Mass Mining

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Hydraulic Fracturing (HF) in cave mining is commonly used in competent rock under high stresses and seismic conditions, to manage risks associated with induced seismicity and cave propagation. The HF process is done using up holes drilled from the undercut level (e.g. El Teniente -Codelco) or down holes from an upper level (e.g. Newcrest mining). Discrete fractures assumed to be in the order of 20 to 40 m in diameter are then created every 1.5 m or 2.5 m along the drill holes, using water at higher pressures. In comparison, other industry experience such as Petroleum, HF is based on similar principles in terms of the drill hole alignment with the principal stresses and the use of water at high pressures, but more efficient during the process of the creation of the network of fractures. The network of fractures thus created covers a volume rather than discrete fractures and could be as long as 100 m. Currently, petroleum HF process is carried out from the surface down to 3,000 m in depth. Also, the use of additional materials such as "sand" to improve the propagation of fractures is another example of Petroleum practices that can be used in Cave Mining. Another point of discussion relies on the current practices in Cave mining, in which, stress anisotropy is not considered to address important topics such as efficiency of the HF process and spatial distribution of the HF holes, for a better coverage of the rock mass. Hydraulic Fracturing is increasingly becoming an essential enabling tool in deep hard rock cave mining, and some of the current HF practices used in the Petroleum industry offer an opportunity to improve the cave mining HF processes. This paper proposes the use of known rock mechanics principles for the cave mining industry to adopt practices used in the Petroleum to achieve the intended outcomes from HF as currently used in cave mining.

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“…When establishing the reservoir DFN model, the natural fracture modelling idea of shale reservoirs is mainly based on seismic ant tracking attributes, imaging logging, outcrop, and core observations for multiscale fracture modelling [41][42][43]. The constraints in DFN modelling can be the fracture density explained by logging, or the fracture density volume data obtained from seismic attributes [44,45].…”

Section: Introductionmentioning

confidence: 99%

Characterization and Modelling of Multiscale Natural Fractures in Shale Reservoirs: A Case Study from a Block in the Southern Sichuan Basin

Gai¹,

Jia

Wei

et al. 2022

Geofluids

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Natural fractures are vital to the efficiencies of drilling and completion operation. The purpose of this paper is to characterize and model multiscale natural fractures in shale reservoirs. Based on the seismic and log responses, as well as outcrop and core observations, we divide natural fractures into Macro, Meso, and Micro three scales. Macroscale fractures are the faults picked directly in seismic profiles. Also, Mesoscale fractures are the natural fracture corridors analyzed by ant tracking technique in 3D seismic data. Furthermore, Microscale fractures are the fractures observed in imaging logs and cores. The fracture intensity is obtained by the correlation between ant tracking attributes and fracture density in borehole. The fracture aperture, dip, and azimuth are three main parameters, which are recognized by the loggings and cores. Stochastic modelling is applied to factures. We find that faults identified by the ant tracking result are excellent in line with Macroscale faults interpreted directly from seismic data. In addition, Mesoscale fractures are indicated from the ant tracking result, which are in accord with breakpoint in the well and in keeping with tectonic history of the area. Such high consistency indicates the ant tracking result is reliable. Moreover, image logs and cores reveal that it mainly develops high angle natural fractures and the fracture aperture is about 1 mm. The fracture strike includes three sets (NNW-SSE, NE-SW, and NNE-SSW). The distribution of the natural fractures in discrete fracture network (DFN) system is distributed controlled by the ant tracking result. Comparing the histograms of DFN results and fracture characterized by seismic and logging responses, as well as outcrop and core observation, it suggests that the major part of the observed natural fractures is retained into our DFN model.

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Geological and Geomechanical Modeling of the Haynesville Shale: A Full Loop for Unconventional Fractured Reservoirs

Cited by 5 publications

References 0 publications

Structural and Stratigraphic Modeling Techniques in Shale and Tight Oil Basin Reservoir Studies

Structural and Stratigraphic Modeling Techniques in Shale and Tight Oil Basin Reservoir Studies

Hydraulic fracturing in cave mining: Opportunities for improvement

Characterization and Modelling of Multiscale Natural Fractures in Shale Reservoirs: A Case Study from a Block in the Southern Sichuan Basin

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