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Laboratory technique for measuring anisotropy of rock samples resistivity and permeability

UDK: 550.822.3
DOI: 10.24887/0028-2448-2018-6-84-86
Key words: true resistivity, absolute gas permeability, cubic rock samples, anisotropic rock properties
Authors: A.S. Sulima (Tyumen Branch of SurgutNIPIneft, RF, Tyumen), A.V. Avilov (Tyumen Branch of SurgutNIPIneft, RF, Tyumen), S.A. Chukhlantsev (Tyumen Branch of SurgutNIPIneft, RF, Tyumen), V.A. Palaguto (Tyumen Branch of SurgutNIPIneft, RF, Tyumen)

This paper is focused on laboratory technique for measuring anisotropy of rock resistivity and permeability. Sedimentation, postsedimentation mineral changes and rock compaction determine vertical and horizontal rock properties anisotropy. Consideration of the electrical anisotropy enhances the accuracy of well log interpretation in case of directional and horizontal wells. Permeability anisotropy data is required for hydrodynamic simulation, design and control of oil and gas field exploration.

Realistic anisotropy data analysis is possible on large statistical sampling due to rock properties variability. That is why the representative core samples collection studies are required for each hydrocarbon bed characterization. The increasing amount of laboratory studies requires the optimization both the laboratory technique and data storage.

Integrated approaches to measuring anisotropy of rock resistivity and permeability and data storage are shown at the example of workflow of Tyumen Branch of SurgutNIPIneft. Cubical samples are using for measuring permeability and resistivity in three directions. All steps of process are shown. They include choosing of sample place in full core column, sample cutting, measuring, data storage, systematization of data in laboratory information system. Data holding in laboratory information system makes it possible both to process anisotropy data and to compare it with routine and special core analysis. Permanent interaction of different laboratories and data quality control gives an opportunity to optimize the workflow and to minimize the possible errors.

This paper is focused on laboratory technique for measuring anisotropy of rock resistivity and permeability. Sedimentation, postsedimentation mineral changes and rock compaction determine vertical and horizontal rock properties anisotropy. Consideration of the electrical anisotropy enhances the accuracy of well log interpretation in case of directional and horizontal wells. Permeability anisotropy data is required for hydrodynamic simulation, design and control of oil and gas field exploration.

Realistic anisotropy data analysis is possible on large statistical sampling due to rock properties variability. That is why the representative core samples collection studies are required for each hydrocarbon bed characterization. The increasing amount of laboratory studies requires the optimization both the laboratory technique and data storage.

Integrated approaches to measuring anisotropy of rock resistivity and permeability and data storage are shown at the example of workflow of Tyumen Branch of SurgutNIPIneft. Cubical samples are using for measuring permeability and resistivity in three directions. All steps of process are shown. They include choosing of sample place in full core column, sample cutting, measuring, data storage, systematization of data in laboratory information system. Data holding in laboratory information system makes it possible both to process anisotropy data and to compare it with routine and special core analysis. Permanent interaction of different laboratories and data quality control gives an opportunity to optimize the workflow and to minimize the possible errors.


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