Changes

::Po is the pore pressure, which is the pressure of fluid inside the rock.

::Po is the pore pressure, which is the pressure of fluid inside the rock.

:::Pr is the reopening pressure.

:::Pr is the reopening pressure.

[[File:GeoWikiWriteOff2021-Tayyib-Figure11.png|framed|center|{{Figure number|11}}The direction of fracture propagation is perpendicular to the minimum horizontal stress. (from Hoeksema, 2015) [7]]]

[[File:GeoWikiWriteOff2021-Tayyib-Figure11.png|framed|center|{{Figure number|11}}The direction of fracture propagation is perpendicular to the minimum horizontal stress. (from Hoeksema<ref>7 Hoeksema, R., 2015, [https://www.slb.com/resource-library/oilfield-review/defining-series/defining-hydraulic-fracturing The defining series: Elements of hydraulic fracturing]: Schlumberger.</ref>)]]

====Hydraulic Testing of Pre-existing Fracture (HTPF)====

====Hydraulic Testing of Pre-existing Fracture (HTPF)====

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7 Hoeksema, R., 2015, The defining series: Elements of hydraulic fracturing. Retrieved from Schlumberger website: https://www.slb.com/resource-library/oilfield-review/defining-series/defining-hydraulic-fracturing.

8 Lin, H., Oh, J., Masoumi, H., Canbulat, I., Zhang, C., & Dou, L., 2018, A review of in situ stress measurement techniques. in Aziz, N., Kininmonth, B. (Ed.). Proceedings of the 2018 Coal Operators' Conference, Mining Engineering, University of Wollongong, 18-20 February 2019 https://ro.uow.edu.au/coal/690

8 Lin, H., Oh, J., Masoumi, H., Canbulat, I., Zhang, C., & Dou, L., 2018, A review of in situ stress measurement techniques. in Aziz, N., Kininmonth, B. (Ed.). Proceedings of the 2018 Coal Operators' Conference, Mining Engineering, University of Wollongong, 18-20 February 2019 https://ro.uow.edu.au/coal/690