This codebook.txt file was generated on <20180405> by ------------------- GENERAL INFORMATION ------------------- 1. Title of Dataset Experimental data on poroelastic moduli of transversely isotropic rock 2. Author Information Principal Investigator Contact Information Name: Joseph F. Labuz Institution: University of Minnesota Address:500 Pillsbury Drive SE, Minneapolis, MN 55455 Email: jlabuz@mn.edu Associate or Co-investigator Contact Information Name: Ali Tarokh Institution: University of Minnesota Address:500 Pillsbury Drive SE, Minneapolis, MN 55455 Email: tarok001@umn.edu 3. Date of data collection, format YYYYMMDD 20160201 to 20161215 4. Geographic location of data collection: Rock Mechanics Laboratory, Department of Civil, Environmental, and Geo- Engineering University of Minnesota, MN, USA 5. Information about funding sources that supported the collection of the data: Partial support for this research was provided by the MSES/Kersten Chair -------------------------- SHARING/ACCESS INFORMATION -------------------------- 1. Licenses/restrictions placed on the data: CC0 1.0 Universal http://creativecommons.org/publicdomain/zero/1.0/ 2. Links to publications that cite or use the data: NONE 3. Recommended citation for the data: Tarokh, Ali; Labuz, Joseph F.. (2021). Experimental data on poroelastic moduli of transversely isotropic rock. Retrieved from the Data Repository for the University of Minnesota, https://doi.org/10.13020/s9ce-z534. --------------------- DATA & FILE OVERVIEW --------------------- These data present volumetric and deviatoric poroelastic moduli from a series of drained, undrained, and unjacketed tests in uniaxial, hydrostatic, and axisymmetric compression for a porous sandstone. These data enable the direct and independent measurement of all eight parameters that fully describe the mechanical response of a transversely isotropic rock. 1. File List A. Filename: Data for Figure 3 Short description: Transversely isotropic elastic parameters B. Filename: Data for Figure 4 Short description: Triaxial compression strength results C. Filename: Data for Figure 5 Short description: The drained bulk response D. Filename: Data for Figure 6 Short description: The unjacketed response E. Filename: Data for Figure 7 Short description: Biot coefficient F. Filename: Data for Figure 8 Short description: Fluid volume change during the drained compression G. Filename: Data for Figure 9 Short description: Unconstrained specific storage coefficient 2. Relationship between files: All in sequence and related prepared to be submitted in a manuscript. 3. Additional related data collected that was not included in the current data package: NONE -------------------------- METHODOLOGICAL INFORMATION -------------------------- 1. Description of methods used for collection/generation of data: Data were collected during experiments using MTS load frame and Teledyne ISCO syringe pump Data acquisition systems. 2. Methods for processing the data: Use of the poroelastic theory and relevant formulas. 3. Instrument- or software-specific information needed to interpret the data: Microsoft Excel 4. Standards and calibration information, if appropriate: NONE 5. Environmental/experimental conditions: Room temperature, high pressures up to 10,000 psi 6. Describe any quality-assurance procedures performed on the data: Performed sensitivity and precision analysis 7. People involved with sample collection, processing, analysis and/or submission: Ali Tarokh ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: [Data for Figure 3] ----------------------------------------- 1. Number of variables: 9 2. Number of cases/rows: 9 columns and 13 rows 3. Missing data codes: NA 4. Variable List A. Name: Confining pressure (σ2 = σ3) Description: The hydrostatic stress applied to the specimen with oil. B. Name: Drained Young's modulus (E') Description: Drained Young’s modulus in the direction normal to the plane of isotropy. C. Name: Drained Young's modulus (E) Description: Drained Young’s modulus in the plane of isotropy. D. Name: Drained Poisson's ratio (ν') Description: Drained Poisson’s ratio in the plane of isotropy to a stress acting normal to it. E. Name: Drained Poisson's ratio (ν) Description: Drained Poisson’s ratio in the plane of isotropy to a stress acting parallel to it. F. Name: Shear modulus (G') Description: Shear modulus in planes normal to the plane of isotropy. G. Name: Shear modulus (G) Description: Shear modulus corresponding to the plane of isotropy. H. Name: Drained Young's modulus (E45) Description: Drained Young’s modulus for 45 degree bedding specimen(= σy/ɛy, see Figure 1c) I. Name: Poisson's ratio (ν45) Description: Drained Poisson's ratio for 45 degree bedding specimen(=-ɛx/ɛy; see Figure 1c) ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: [Data for Figure 4] ----------------------------------------- 1. Number of variables: 2 2. Number of cases/rows: 3 columns and 9 rows 3. Missing data codes: NA 4. Variable List A. Name: Major principal stress (σ1) Description: Major principal stress B. Name: Minor principal stress (σ3) Description: Minor principal stress ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: [Data for Figure 5] ----------------------------------------- 1. Number of variables: 4 2. Number of cases/rows: 5 columns and 29 rows 3. Missing data codes: NA 4. Variable List A. Name: Change in mean stress (ΔP) Description: Change in mean stress, defined as the summation of three principal stresses divided by three. B. Name: Change in axial strain (Δɛa) Description: Change in length over initial length in axial direction. C. Name: Change in circumferential strain (Δɛθ) Description: Change in circumference over initial circumference in lateral direction. D. Name: Change in volumetric strain (Δɛ) Description: Change in bulk volume over initial bulk volume. ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: [Data for Figure 6] ----------------------------------------- 1. Number of variables: 5 2. Number of cases/rows: 5 columns and 17 rows 3. Missing data codes: NA 4. Variable List A. Name: Mean stress (P) Description: Summation of three principal stresses divided by three. B. Name: Normal strain in x direction (ɛxx) Description: Change in length over initial length in x direction. C. Name: Normal strain in y direction (ɛyy) Description: Change in length over initial length in y direction. D. Name: Normal strain in z direction (ɛzz) Description: Change in length over initial length in z direction. E. Name: Volumetric strain (ɛ) Description: Change in bulk volume over initial bulk volume. ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: [Data for Figure 7] ----------------------------------------- 1. Number of variables: 2 2. Number of cases/rows: 2 columns and 14 rows 3. Missing data codes: NA 4. Variable List A. Name: Terzaghi effective stress (P') Description: Difference between mean stress and pore pressure. B. Name: Biot coefficient (α) Description: Change in the fluid volume (leaving or entering the specimen) divided by the change in the bulk volume. ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: [Data for Figure 8] ----------------------------------------- 1. Number of variables: 3 2. Number of cases/rows: 3 columns and 4 rows 3. Missing data codes: NA 4. Variable List A. Name: Terzaghi effective stress (P') Description: Difference between mean stress and pore pressure. B. Name: Change in fluid volume (ΔVf) Description: Change in the fluid volume during drained compression. C. Name: Change in bulk volume (ΔV) Description: Change in the bulk volume during drained compression. ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: [Data for Figure 9] ----------------------------------------- 1. Number of variables: 2 2. Number of cases/rows: 2 columns and 20 rows 3. Missing data codes: NA 4. Variable List A. Name: Change in pore pressure (Δp) Description: Change in the fluid pressure in the pore space of rock. B. Name: Fluid volume change under constant mean stress (ΔVf(2)) Description: Volume of fluid entering or leaving the rock while pore pressure changes and mean stress is constant.