An Interactive 5-Day Training Course
Geomechanics for Unconventional Reservoirs
Geomechanics for Shale Wells and Completions
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Duration
5 Days
Price
$ 3,500
Starting From
01 Feb 2027
Home Geology and Geoscience Geomechanics for Unconventional Reservoirs
Geomechanics for Unconventional Reservoirs
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Geomechanics for Unconventional Reservoirs - GG-UGEOM-PEA27
| Code | Date | Time | Duration | Location | Currency | Early Bird Fee Per Person |
|---|---|---|---|---|---|---|
| GG-UGEOM-PEA27 | 01 - 05 Feb 2027 | 10 AM CST | 4 Hours Per Day |
Online |
USD |
3500 |
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Geomechanics for Unconventional Reservoirs
This training covers geomechanics applied to unconventional reservoirs. It works through stress and property characterisation in mudrocks, anisotropy and its measurement, mechanical stratigraphy and fracture containment, hydraulic fracture initiation and propagation, stress shadow and cluster spacing, natural fracture interaction, depletion and parent-child well interference, induced seismicity and the geomechanical basis of completion design.
Description
In an unconventional reservoir the completion creates the permeability, which means the geomechanics determines the productivity. Where the hydraulic fracture grows, how far it extends, whether it stays in the target interval, how it interacts with natural fractures and with neighbouring stages, and how the stress field changes as the well depletes are all geomechanical questions, and they are the questions that separate a well that pays back from one that does not.
This training covers the subject as it applies to mudrock plays. Stress and property characterisation in mudrocks are established first, covering the particular difficulties of measuring properties in fine-grained anisotropic rock and the stress profile construction required. Anisotropy follows in detail, since mudrocks are strongly anisotropic and ignoring it produces wrong stress and wrong fracture geometry. Mechanical stratigraphy and fracture containment are then developed, covering the stress contrasts between layers and their control on vertical fracture growth. Hydraulic fracture initiation and propagation follow, covering the mechanics, the geometry models and their limitations. Stress shadow and cluster spacing are then addressed as the central completion design issue. Natural fracture interaction follows. Depletion and parent-child interference are then developed. Induced seismicity is addressed. The training closes with the geomechanical basis of completion design.
Stress contrast between layers controls fracture height more than anything else. A hydraulic fracture grows vertically until it meets a layer with a higher minimum horizontal stress, where further growth requires more pressure than the fracture can supply. A stress contrast of a few megapascals is sufficient to contain a fracture. This means that the vertical placement of the well and the perforation clusters, relative to the stress profile rather than to the organic richness profile, determines whether the fracture stays in the pay. Many disappointing completions are explained by this and by nothing else.
The stress shadow of one fracture changes where the next one goes. Opening a hydraulic fracture increases the stress in the rock around it, and that increase persists for the duration of the treatment. A subsequent fracture initiated nearby encounters the altered stress field and may be suppressed, deflected or diverted into an unintended path. This is the mechanical basis for cluster spacing: too close and the clusters compete, with some taking most of the fluid and others taking none; too far apart and the rock between them is left unstimulated. The optimum depends on the stress contrast, the fracture dimensions and the treatment design.
Mudrock anisotropy is large and treating the rock as isotropic produces wrong answers. Horizontal Young's modulus in a laminated mudrock is commonly thirty to fifty per cent higher than vertical, and the anisotropic stress calculation gives a different minimum horizontal stress from the isotropic one, often by an amount comparable to the stress contrasts that govern fracture containment. Anisotropic properties require either cross-dipole sonic data with the appropriate processing, or core measurements on samples cut at several angles to bedding, and both belong in a mudrock geomechanics programme.
Finally, depletion makes a well a geomechanical neighbour to everything around it. Production from a horizontal well reduces pore pressure in a region around it, which reduces the local horizontal stresses and creates a pressure sink. A later well fractured nearby will have its fractures drawn into the depleted region, where they may connect directly to the older well, taking fluid and producing the parent-child interference that has become a major issue in developed plays. Predicting this requires a depletion-updated stress model, not the original one.
By the end of this training, participants will be able to:
- Characterise stress and mechanical properties in mudrock reservoirs
- Measure and apply elastic anisotropy in stress calculations
- Build mechanical stratigraphy and identify stress barriers
- Predict hydraulic fracture containment from the stress profile
- Apply fracture initiation and propagation concepts
- Assess stress shadow effects and their consequences for cluster spacing
- Evaluate hydraulic and natural fracture interaction
- Predict depletion induced stress change around producing wells
- Assess parent-child well interference risk
- Apply geomechanical reasoning to completion and spacing design
The training works on unconventional play data sets with completion and production outcomes. Participants build anisotropic stress profiles, identify containment barriers and predict fracture height, then compare against microseismic and diagnostic data. Cluster spacing designs are assessed against stress shadow calculations. Depletion stress models are built and used to assess interference risk for infill locations.
Organisations sending participants to this training will:
- Place wells and clusters using the stress profile
- Improve fracture containment within target intervals
- Design cluster spacing on a mechanical basis
- Predict and manage parent-child interference
- Reduce stimulation spend wasted outside the target
- Improve the geomechanical basis of completion design
Participants will:
- Build anisotropic stress profiles in mudrocks
- Predict fracture containment
- Assess stress shadow and cluster competition
- Model depletion stress change
- Evaluate interference risk
- Contribute to completion design decisions
- Geomechanics staff working unconventional plays
- Completion and stimulation engineers
- Reservoir engineers in unconventional assets
- Geoscientists supporting unconventional development
- Petrophysicists working mudrock properties
- Well planners and spacing analysts
- Technical staff reviewing completion designs
Module 1 - Mudrock Properties and Stress
- Mudrock composition and its mechanical effects
- Clay, quartz and carbonate content
- Organic content and its mechanical role
- Elastic property measurement in mudrocks
- Log based property derivation
- Core testing of mudrocks and its difficulties
- Strength in mudrocks
- Brittleness indices and their limitations
- Minimum horizontal stress estimation
- DFIT interpretation in low permeability rock
- Stress profile construction
- Calibration against treatment pressures
Module 2 - Anisotropy
- Transverse isotropy in laminated mudrocks
- Anisotropic elastic constants
- Thomsen parameters
- Cross-dipole sonic measurement
- Processing for anisotropic properties
- Core measurement at multiple angles
- Vertical against horizontal modulus
- Anisotropic stress calculation
- Difference from isotropic results
- Anisotropy effects on fracture geometry
- Strength anisotropy and bedding failure
- Practical anisotropy workflows
Module 3 - Mechanical Stratigraphy and Containment
- Mechanical layering definition
- Stress contrast between layers
- Barrier identification from the stress profile
- Magnitude of contrast required for containment
- Modulus contrast and its role
- Interface slip and fracture arrest
- Toughness contrast effects
- Vertical fracture growth prediction
- Landing zone selection from stress
- Target interval against stress barrier position
- Microseismic evidence of containment
- Diagnostics for fracture height
Module 4 - Fracture Initiation and Propagation
- Breakdown pressure and initiation
- Perforation and near wellbore effects
- Fracture orientation and the stress field
- Transverse against longitudinal fractures
- Fracture propagation mechanics
- PKN, KGD and radial geometry models
- Pseudo three dimensional models
- Planar three dimensional models
- Fluid efficiency and leak-off
- Net pressure analysis
- Treatment pressure diagnostics
- Model limitations in mudrocks
Module 5 - Stress Shadow and Spacing
- Stress shadow concept and magnitude
- Poroelastic and mechanical components
- Shadow extent and its decay
- Cluster competition and fluid distribution
- Dominant cluster behaviour
- Cluster spacing selection
- Stage length and cluster count
- Limited entry design
- Sequential against simultaneous fracturing
- Zipper fracturing and its mechanics
- Well spacing and stress interaction
- Diagnostics for cluster efficiency
Module 6 - Natural Fracture Interaction
- Natural fractures in mudrocks
- Fracture characterisation in unconventional plays
- Hydraulic and natural fracture intersection
- Crossing, arrest and diversion
- Controls on the interaction outcome
- Fracture complexity and its evidence
- Shear stimulation of natural fractures
- Critically stressed fracture reactivation
- Microseismic evidence of complexity
- Complex against planar fracture networks
- Implications for conductivity and proppant
- Modelling fracture networks
Module 7 - Depletion and Interference
- Pore pressure depletion around a well
- Depletion geometry and its extent
- Stress reduction from depletion
- Stress path coefficients in mudrocks
- Depletion updated stress models
- Fracture growth into depleted zones
- Parent-child interference mechanisms
- Frac hits and their consequences
- Pressure communication between wells
- Timing and sequencing to reduce interference
- Pressure management before infill fracturing
- Infill well placement under depletion
Module 8 - Induced Seismicity and Design
- Induced seismicity in unconventional operations
- Fault reactivation mechanisms
- Pressure and poroelastic triggering
- Basement fault risk
- Seismic hazard screening
- Monitoring and traffic light systems
- Operational mitigation measures
- Geomechanical inputs to completion design
- Landing zone and cluster placement
- Spacing design on mechanical grounds
- Integrating diagnostics into design updates
- Reviewing a completion design geomechanically
Upon successful completion of this training course, delegates will be awarded an official Certificate of Completion issued by the Petroleum Engineers Association (PEA), an ISO 9001:2015 certified training organization. The certificate carries 10 Credits and formally records the total learning hours completed.
Each certificate is signed by the Course Facilitator and the CEO of the Petroleum Engineers Association, and serves as verifiable proof of professional training that delegates can present to employers and professional bodies worldwide.
Frequently Asked Questions
All course bookings made through PEA are strictly non-refundable. By registering for a course, you acknowledge and accept that all fees are payable in full and are not subject to refund under any circumstances, including changes in personal or professional commitments or partial attendance.
PEA reserves the right to make reasonable adjustments to course content, trainers, or schedules where necessary, without entitling delegates to a refund. Comprehensive details of each course — including objectives, target audience, and content — are clearly outlined before enrolment, and it is the responsibility of the delegate to ensure the course's suitability prior to booking.
For any inquiries related to cancellations or bookings, please contact our support team, who will be happy to assist you.
