The Role of Thermophysical Profiling for Core Sampling for Laboratory Investigations of Source Rocks

Чехонин, E.; Shakirov, A.; Popov, Evgeny; Romushkevich, R.; Popov, Y.; Bogdanovich, N.; Rudakovskaya, S.

doi:10.3997/2214-4609.201900478

EAGE/SPE Workshop on Shale Science 2019 2019

DOI: 10.3997/2214-4609.201900478

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The Role of Thermophysical Profiling for Core Sampling for Laboratory Investigations of Source Rocks

E. Чехонин¹,

A. Shakirov²,

Evgeny Popov³

et al.

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“…Despite the above features, the integration of scratching data and thermal profiling is of practical interest, particularly for unconventional formations [10,12,14,17,20,[41][42][43][44], since it allows us to refine the rock typing, quantitatively evaluate heterogeneity in strength and thermal properties, determine the locations of sampling for further laboratory studies (accounting for rock heterogeneity and thermal anisotropy), and establish for individual intervals the dependence of the "UCS-thermal conductivity" relationship to further use them for predicting UCS with the results of optical scanning.…”

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confidence: 99%

Integration of Thermal Core Profiling and Scratch Testing for the Study of Unconventional Reservoirs

et al. 2021

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Core analysis provides the essential information necessary for the characterization and development of hydrocarbon reservoirs. High core-scale heterogeneity and anisotropy, natural in unconventional reservoirs, complicate reservoir characterization and dictate the sampling methodology used. Continuous high-resolution thermal measurements with an optical scanner and scratcher along the core column can yield benefits in a sampling strategy. This article describes some features of the suggested integration of non-destructive thermal profiling with partially destructive scratch testing applied for the study of rocks from the Bazhenov Formation (West Siberia, Russia). The spatial variation in the unconfined compressive strength and thermal conductivity components parallel and perpendicular to bedding for more than 1000 samples are demonstrated and discussed on core and log scales. The relationships between these properties are established for different rock types composing the formation. The joint analysis allows specialists to correctly define multiscale heterogeneities and facies that would be difficult or impossible to observe with logging data analysis or geological description alone. The established relationships make it possible to partially replace the semi-destructive scratch test with non-destructive optical scanning, providing UCS estimation. One more important outcome of the present work is the lessons learned regarding how to organize future works. The integration of thermal core profiling and scratch testing data looks promising for unconventional reservoir characterization.

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Integration of Thermal Core Profiling and Scratch Testing for the Study of Unconventional Reservoirs

et al. 2021

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Advanced techniques for determining thermal properties on rock samples and cuttings and indirect estimating for atmospheric and formation conditions

Popov

Goncharov

Popov

et al. 2019

IOP Conf. Ser.: Earth Environ. Sci.

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A set of advanced methods and instruments was developed to improve essentially quality of experimental data on reservoir thermal properties (thermal conductivity, thermal diffusivity, volumetric heat capacity, coefficient of linear thermal expansion) at atmospheric and reservoir thermobaric conditions. The new thermal core logging technique provides continuous high-resolution profiling rock thermal properties along wells accounting for rock anisotropy and multi-scale heterogeneity. Integration of the technique application results with standard well logging data leads to possibilities of high resolution profiling porosity, rock matrix thermal properties, elastic wave velocities and modulus, rock density, etc. New approaches are described that allow indirect determination of the reservoir thermal properties from standard petrophysical logging data accounting for formation anisotropy. A new laser optical scanning instrument, enhanced theoretical modeling of effective thermal properties and special workflow opened a way to determination of combination for rock thermal properties on rock cuttings at formation temperatures. The new experimental basis improves reliability of data on physical properties of reservoirs, results of specific heat flow determination and reservoir thermal regime modeling within prospecting, exploration and development of geothermal energy fields.

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Advanced Methods of Thermal Petrophysics as a Means to Reduce Uncertainties during Thermal EOR Modeling of Unconventional Reservoirs

et al. 2021

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Within the vast category of unconventional resources, heavy oils play an essential role as related resources are abundant throughout the world and the amount of oil produced using thermal methods is significant. Simulators for thermo–hydro–dynamic modeling, as a mandatory tool in oilfield development, are continuously improving. However, the present paper shows that software capabilities for the integration of data on the rock thermal properties necessary for modeling are limited, outdated in some aspects, and require revision. In this paper, it is demonstrated that a characteristic lack of reliable data on rock thermal properties also leads to significant errors in the parameters characterizing oil recovery efficiency. A set of advanced methods and equipment for obtaining reliable data on thermal properties is presented, and a new, vast set of experimental data on formation thermal properties obtained from the Karabikulovskoye heavy oil field (Russia) is described. The time-dependent results of modeling oil recovery at the field segment using the steam-assisted gravity drainage method with both published and new data are discussed. It is shown that the lack of experimental data leads to significant errors in the evaluation of the cumulative oil production (up to 20%) and the cumulative steam/oil ratio (up to 52%).

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The Role of Thermophysical Profiling for Core Sampling for Laboratory Investigations of Source Rocks

Cited by 3 publications

References 0 publications

Integration of Thermal Core Profiling and Scratch Testing for the Study of Unconventional Reservoirs

Integration of Thermal Core Profiling and Scratch Testing for the Study of Unconventional Reservoirs

Advanced techniques for determining thermal properties on rock samples and cuttings and indirect estimating for atmospheric and formation conditions

Advanced Methods of Thermal Petrophysics as a Means to Reduce Uncertainties during Thermal EOR Modeling of Unconventional Reservoirs

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