This codebook.txt file was generated on 2018/04/05 by Joseph F. Labuz ------------------- GENERAL INFORMATION ------------------- 1. Title of Dataset Experimental data on pore moduli of porous 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: 2016/02/01 to 2016/12/16 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 2. Links to publications that cite or use the data: Currently in review. 3. Links to other publicly accessible locations of the data: NONE 4. Links/relationships to ancillary data sets: NONE 5. Was data derived from another source? NO 6. Recommended citation for the data: Tarokh, Ali; Labuz, Joseph F. (2018). Experimental data on pore moduli of porous rock. Retrieved from the Data Repository for the University of Minnesota, https://doi.org/10.13020/D6RX0J. --------------------- DATA & FILE OVERVIEW --------------------- 1. File List A. Filename: Figure 3 Data Short description: Comparison between the elastic solution and strain gage readings B. Filename: Figure 4 Data Short description: Volumetric responses during a constant pore pressure C. Filename: Figure 5 Data Short description: Volumetric responses during a constant mean stress D. Filename: Figure 6 Data Short description: Volumetric response of rock during a constant mean stress and pore pressre E. Filename: Figure 7 Data Short description: Bulk and pore volume strains of rock during an unjacketed experiment F. Filename: Figure 8 Data Short description: Pore volume strains during constant mean stress and pore pressure G. Filename: Figure 9 Data Short description: The drained bulk response as a function of effective stress H. Filename: Figure 10 Data Short description: Effect of the variation of Skempton coefficient on unjacketed pore modulus of rock 2. Relationship between files: All in sequence and related to a submitted manuscript. 3. Additional related data collected that was not included in the current data package: NONE 4. Are there multiple versions of the dataset? yes/no: NO -------------------------- 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 140 MPa (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: [Figure 3] ----------------------------------------- 1. Number of variables: 3 2. Number of cases/rows: 6 columns and 355 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: Axial strain (ɛz) Description: Change in length over initial length in (axial) z-direction. C. Name: Circumferential strain (ɛθ) Description: Change in circumference over initial circumference. ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: [Figure 4] ----------------------------------------- 1. Number of variables: 5 2. Number of cases/rows: 12 columns and 21 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: Pore pressure (p) Description: Fluid pressure in the pore space. C. Name: Total volume change (Vtotal) Description: The total volume recorded externally with a syringe pump. D. Name: Cylinder volume change (Vcylinder) Description: The hollow cylinder volume computed from the elastic solution E. Name: System volume change (Vsystem) Description: The system volume computed from subtracting the cylinder volume change from the total volume change. ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: [Figure 5] ----------------------------------------- Please note there are two figures: 5a and 5b 1. Number of variables: 5 2. Number of cases/rows: 11 columns and 41 rows 3. Missing data codes: NA 4. Variable List A. Name: Pore pressure (p) Description: Fluid pressure in the pore space. B. Name: Total volume change (Vtotal) Description: Total volume recorded externally with a syringe pump. C. Name: Cylinder volume change (Vcylinder) Description: The hollow cylinder volume computed from the elastic solution D. Name: System volume change (Vsystem) Description: The system volume change computed by subtracting the cylinder and fluid volume changes from the total volume change. E. Name: Fluid volume change (Vfluid) Description: The fluid volume computed by knowing fluid's bulk modulus and initial fluid volume. ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: [Figure 6] ----------------------------------------- Please note there are two figures: 6a and 6b 1. Number of variables: 6 2. Number of cases/rows: 9 columns and 21 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 pore pressure (Δp) Description: Change in the fluid pressure in the pore space of rock. C. Name: Change in total volume change (ΔVtotal) Description: Change in total volume recorded externally with a syringe pump. D. Name: Change in system volume change (ΔVsystem) Description: Change in system volume change computed by the differences between total volume changes and other relevant volume changes. E. Name: Change in fluid volume change (ΔVfluid) Description: Change in fluid volume computed by knowing fluid's bulk modulus and initial fluid volume. F. Name: Change in pore volume of rock(ΔVrock pore) Description: Change in pore volume of rock, computed by the differences between total volume changes and fluid and system volume changes. ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: [Figure 7] ----------------------------------------- Please note there are two figures: 7a and 7b 1. Number of variables: 4 2. Number of cases/rows: 11 columns and 42 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: Change in pore volume of rock(ΔVpore) Description: Change in pore volume of rock computed from previous steps. C. Name: Change in bulk volume strain(Δɛ) Description: Change in bulk volume over initial bulk volume. D. Name: Change in pore volume strain(Δɛp) Description: Change in pore volume over initial pore volume. ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: [Figure 8] ----------------------------------------- Please note there are two figures: 8a and 8b 1. Number of variables: 5 2. Number of cases/rows: 9 columns and 42 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: Change in pore volume of rock(ΔVpore) Description: Change in pore volume of rock computed from previous steps. C. Name: Change in pore volume strain(Δɛp) Description: Change in pore volume over initial pore volume. D. Name: Mean stress (P) Description: Summation of three principal stresses divided by three. E. Name: Terzaghi effective stress (P') Description: Difference between mean stress and pore pressure. ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: [Figure 9] ----------------------------------------- Please note there are two figures: 9a and 9b 1. Number of variables: 3 2. Number of cases/rows: 7 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: Pore pressure (p) Description: Fluid pressure in the pore space. C. Name: Change in bulk volume strain(Δɛv) Description: Change in bulk volume over initial bulk volume. ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: [Figure 10] ----------------------------------------- 1. Number of variables: 8 2. Number of cases/rows: 7 columns and 102 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: Pore pressure (p) Description: Fluid pressure in the pore space. C. Name: Terzaghi effective stress (P') Description: Difference between mean stress and pore pressure. D. Name: Skempton coefficient (B) Description: Change pore pressure over change in mean stress in an undrained test. E. Name: Fluid bulk modulus (Kf) Description: Change in fluid pressure over its volume strain. F. Name: Drained pore modulus (Kp) Description: Change in mean stress over pore volume strain in a drained test. G. Name: Unjacketed pore modulus (Ks'') Description: Change in pore pressure over pore volume strain when changes in mean stress and pore pressure are equal. H. Name: Critical Skempton coefficient (Bc) Description: A skempton coefficient that makes the unjacketed pore modulus to go to infinity.