New geothermal data from the Kola superdeep well SG-3

Popov, Y.; Pevzner, Sergei L.; Pimenov, V.; Romushkevich, R.

doi:10.1016/s0040-1951(99)00065-7

Cited by 78 publications

(52 citation statements)

References 14 publications

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“…According to Kukkonen (1989), Popov et al (1999), Slagstad et al (2009), Kukkonen et al (2010 and others, the significant changes in the shallow temperatures can be related to palaeoclimatic effects and/or advective cooling due to groundwater flow. In the case of the Moss area, drilling and logging in the Årvollskogen borehole indicate the presence of a number of fracture zones.…”

Section: Results Of 2d Conductive Thermal Modellingmentioning

confidence: 99%

2D structural and thermal models in southeastern Norway based on the recently drilled Årvollskogen borehole and 2D density, magnetic and thermal modelling

et al. 2014

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Section: Results Of 2d Conductive Thermal Modellingmentioning

confidence: 99%

2D structural and thermal models in southeastern Norway based on the recently drilled Årvollskogen borehole and 2D density, magnetic and thermal modelling

et al. 2014

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“…Scientific and industrial coring programs and the advent of wellbore image logs have revolutionized our understanding of fractures and have revealed that open fractures exist at far greater depths than previously thought possible (National Research Council, ). For example, open fractures with circulating fluids were detected at depths of nearly 12,000 m and pressures of 300 MPa in the Kola Superdeep drill hole in Russia (Popov et al, ), and similar, unexpected fluid‐filled fractures were encountered in the KTB superdeep drill hole in Germany (e.g., Zimmermann et al, ). Open fractures are widespread in hydrocarbon reservoirs at 6‐ to 8‐km depth.…”

Section: The Challenge Of Natural Fractures In the Earthmentioning

confidence: 92%

The Role of Chemistry in Fracture Pattern Development and Opportunities to Advance Interpretations of Geological Materials

Laubach

Lander²,

Criscenti

et al. 2019

Reviews of Geophysics

228

106

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Fracture pattern development has been a challenging area of research in the Earth sciences for more than 100 years. Much has been learned about the spatial and temporal complexity inherent to these systems, but severe challenges remain. Future advances will require new approaches. Chemical processes play a larger role in opening‐mode fracture pattern development than has hitherto been appreciated. This review examines relationships between mechanical and geochemical processes that influence the fracture patterns recorded in natural settings. For fractures formed in diagenetic settings (~50 to 200 °C), we review evidence of chemical reactions in fractures and show how a chemical perspective helps solve problems in fracture analysis. We also outline impediments to subsurface pattern measurement and interpretation, assess implications of discoveries in fracture history reconstruction for process‐based models, review models of fracture cementation and chemically assisted fracture growth, and discuss promising paths for future work. To accurately predict the mechanical and fluid flow properties of fracture systems, a processes‐based approach is needed. Progress is possible using observational, experimental, and modeling approaches that view fracture patterns and properties as the result of coupled mechanical and chemical processes. A critical area is reconstructing patterns through time. Such data sets are essential for developing and testing predictive models. Other topics that need work include models of crystal growth and dissolution rates under geological conditions, cement mechanical effects, and subcritical crack propagation. Advances in machine learning and 3‐D imaging present opportunities for a mechanistic understanding of fracture formation and development, enabling prediction of spatial and temporal complexity over geologic timescales. Geophysical research with a chemical perspective is needed to correctly identify and interpret fractures from geophysical measurements during site characterization and monitoring of subsurface engineering activities.

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“…Since the 1990s, the optical scanning technique [15] was widely applied to measurements of rock thermal conductivity, which has advantages such as high work efficiency, non contact manner, direct measurements on rock-cores (no need to make samples) and being able to estimate anisotropy and inhomogeneity of rocks. So far the successful cases of its utility includes the Vorotilovo deep borehole at the East Europe platform [28] , deep borehole at the Kola peninsula of Russia [29] , and deep borehole at the Sulu-Dabie area of China [30] .…”

Section: Measurement Methods Of Rock Thermal Conductivitymentioning

confidence: 99%

Characteristics of Heat Flow and Lithospheric Thermal Structure in the Junggar Basin, Northwestern China

Rao

Zhu

et al. 2013

Chinese J of Geophysics

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Characteristics of present-day heat flow and thermal structure of lithosphere in basins are essential constraints to reveal the tectonic-thermal evolution process and to reconstruct thermal history of the basins, which are of great significance for research of basin dynamics and evaluation of petroleum resources. This work is based on 11 newly measured high-quality heat flow values from well-log temperature data in 102 boreholes, oil-test temperature data in over 400 new boreholes, and thermal conductivity data of 187 samples from 15 wells measured by optical scanning in the Junggar basin. Our purpose is to analyze features of heat flow and reveal thermal structure of lithosphere in this basin. The results show current geotemperature gradients between 11.6∼27.6 • C/km, 21.3±3.7• C/km on average; and surface heat flow between 23.4∼56.1 mW/m 2 ; 42.5±7.41 mW/m 2 on average; which imply a cold basin with low geotemperature gradients and low heat flow. These values in the Junggar basin are distributed in largely consistent patterns, primarily controlled by the structural shape of the basement. They are the highest at the uplift in the east, next at the Luliang uplift, relatively low in the Wulungu depression, central depression, and the uplift in the west, and lowest in the range-front depression of the North TianShan. Beneath the Junggar basin, the crustal heat flow is 18.8∼26.0 mW/m 2 , mantle heat flow 16.5∼23.7 mW/m 2 , the ratio of the former to the latter is 0.79∼1.58, indicative of a thermal structure of cold crust and cold mantle. The distribution of mantle heat flow values accords with topography of the Moho interface, which are high below uplifts and low beneath depressions in the basin.

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New geothermal data from the Kola superdeep well SG-3

Cited by 78 publications

References 14 publications

2D structural and thermal models in southeastern Norway based on the recently drilled Årvollskogen borehole and 2D density, magnetic and thermal modelling

2D structural and thermal models in southeastern Norway based on the recently drilled Årvollskogen borehole and 2D density, magnetic and thermal modelling

The Role of Chemistry in Fracture Pattern Development and Opportunities to Advance Interpretations of Geological Materials

Characteristics of Heat Flow and Lithospheric Thermal Structure in the Junggar Basin, Northwestern China

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