![4.4.2.2: Derivation of the Diffusivity Equation in Radial-Cylindrical Coordinates | PNG 301: Introduction to Petroleum and Natural Gas Engineering 4.4.2.2: Derivation of the Diffusivity Equation in Radial-Cylindrical Coordinates | PNG 301: Introduction to Petroleum and Natural Gas Engineering](https://www.e-education.psu.edu/png301/sites/www.e-education.psu.edu.png301/files/Lesson_04/Images/figure_4.07.jpg)
4.4.2.2: Derivation of the Diffusivity Equation in Radial-Cylindrical Coordinates | PNG 301: Introduction to Petroleum and Natural Gas Engineering
![Permeability enhancement through hydraulic fracturing: laboratory measurements combining a 3D printed jacket and pore fluid over-pressure | Scientific Reports Permeability enhancement through hydraulic fracturing: laboratory measurements combining a 3D printed jacket and pore fluid over-pressure | Scientific Reports](https://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fs41598-019-49093-1/MediaObjects/41598_2019_49093_Fig1_HTML.png)
Permeability enhancement through hydraulic fracturing: laboratory measurements combining a 3D printed jacket and pore fluid over-pressure | Scientific Reports
![4.4.1.4: Pseudo Steady-State Flow of Oil to a Vertical Production well | PNG 301: Introduction to Petroleum and Natural Gas Engineering 4.4.1.4: Pseudo Steady-State Flow of Oil to a Vertical Production well | PNG 301: Introduction to Petroleum and Natural Gas Engineering](https://www.e-education.psu.edu/png301/sites/www.e-education.psu.edu.png301/files/Lesson_04/Images/figure_4.05.jpg)
4.4.1.4: Pseudo Steady-State Flow of Oil to a Vertical Production well | PNG 301: Introduction to Petroleum and Natural Gas Engineering
![4.4.1.2: Steady-State Flow of Oil to a Vertical Production Well with Well Damage or Well Stimulation | PNG 301: Introduction to Petroleum and Natural Gas Engineering 4.4.1.2: Steady-State Flow of Oil to a Vertical Production Well with Well Damage or Well Stimulation | PNG 301: Introduction to Petroleum and Natural Gas Engineering](https://www.e-education.psu.edu/png301/sites/www.e-education.psu.edu.png301/files/Lesson_04/Images/figure_4.02.jpg)
4.4.1.2: Steady-State Flow of Oil to a Vertical Production Well with Well Damage or Well Stimulation | PNG 301: Introduction to Petroleum and Natural Gas Engineering
![4.4.1.2: Steady-State Flow of Oil to a Vertical Production Well with Well Damage or Well Stimulation | PNG 301: Introduction to Petroleum and Natural Gas Engineering 4.4.1.2: Steady-State Flow of Oil to a Vertical Production Well with Well Damage or Well Stimulation | PNG 301: Introduction to Petroleum and Natural Gas Engineering](https://www.e-education.psu.edu/png301/sites/www.e-education.psu.edu.png301/files/Lesson_04/Images/figure_4.03.jpg)