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oa Effect of Pressure Depletion Dynamicity on Induced Strain due to Hydraulic Fracturing in Child Wells
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, First EAGE/AMGP/AMGE Latin-American Seminar in Unconventional Resources, Nov 2017, Volume 2017, p.1 - 3
Abstract
Pressure depletion caused by production of first well in section (parent well) generates continuous changes in stress magnitude and orientation. Simplistic geomechanical models ignore such effect and usually are built based on original conditions resulting in overestimation of induced strain which will be reflected in oversized hydraulic fracture job that will negatively affect not only the subsequent wells (childs) but also the first well in section itself. Negative effects are usually irreversible, for instance fracture hits and interference and need to mitigated. This work presents a workflow where changes in the pressure field are incorporated and taking into consideration during geomechanical modeling of induced strain using full continuum mechanics, such strain is one of the driving inputs for hydraulic fracture design. As a result, hydraulic fracture designs are adjusted to the reservoir conditions at the time new wells will be drilled and completed, reducing to the minimum such negative effects. Productivity of the well pad using the simplistic approach will be compared to the full continuum mechanics solution using dynamic reservoir simulation.