The Application of Microseismic Monitoring in Unconventional Reservoirs
Geomechanical models have been introduced to qualify the impact of key parameters that control the extent and complexity of productive stimulated rock volume.
The model was calibrated and showed a similar half lengths and coverage area. This study was based on a set of calibrated Discrete Fracture Network (DFN) properties derived from a sensitivity analysis, and could be applied for stimulation design optimization.
Information Required:
- Geomechanical testing reports
- All available wireline logs (cavern and offset wells)
- Surface and downhole caverns map with detail downhole and surface distances between them
- Directional survey (digital)
- Actual sonar (digital)
- Production casing information (type, grade, weight, threads)
- Information about any casing damage
- Last MIT report
- Hydrogeology
- Mineralogical, core reports
- Drilling reports (with focus on: drilling problems, tight hole, water inflow)
- Any other known operations that may affect geomechanical results.
Geomechanical analysis will be carried out in the following steps:
- Building of 3D model (one cavern of group of caverns) based on stratigraphic and petrological data included in geophysical logs,
- Model calibration with use of geomechanical parameters from rocks laboratory tests,
- Evaluation of cavern stability and integrity,
- Evaluation of cavern closure and casing strain,
- Modelling of multiple caverns interactions,
- Evaluation of surface subsidence,
- Final report preparation.
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