An Interactive 5-Day Training Course
Well Prognosis & Pre-Drill Prediction
Predicting the Well Section Before Drilling
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Duration
5 Days
Price
$ 3,500
Starting From
13 Sep 2027
Home Geology and Geoscience Well Prognosis & Pre-Drill Prediction
Well Prognosis & Pre-Drill Prediction
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Well Prognosis & Pre-Drill Prediction - GG-PROG-PEA27
| Code | Date | Time | Duration | Location | Currency | Early Bird Fee Per Person |
|---|---|---|---|---|---|---|
| GG-PROG-PEA27 | 13 - 17 Sep 2027 | 10 AM CST | 4 Hours Per Day |
Online |
USD |
3500 |
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Well Prognosis & Pre-Drill Prediction
This training covers well prognosis and pre-drill prediction. It works through stratigraphic prognosis construction, depth prediction and its uncertainty, pore pressure and fracture gradient prediction, temperature and fluid prediction, lithology and drilling hazard prediction, data acquisition programme design, prognosis documentation, real-time updating during drilling and post-well analysis and learning.
Description
A well prognosis is the prediction of what a well will encounter, and it is used by everyone involved in the well. The drilling engineer designs casing and mud programmes from the predicted pressures. The geologist plans data acquisition against the predicted section. The operations team sets contingencies against the predicted hazards. When a prognosis is wrong, the consequences range from a wasted logging run to a well control incident, and most of the error is avoidable.
This training covers the full prognosis. Stratigraphic prognosis is established first, covering correlation from offset wells and seismic, formation top prediction, thickness estimation and the treatment of lateral variation. Depth prediction follows, covering velocity models, depth conversion, the uncertainty in each top and the way that uncertainty should be expressed to the drilling team. Pore pressure prediction is then developed in detail, covering generation mechanisms, prediction from seismic velocities and offset well data, the normal compaction trend approach, centroid and lateral transfer effects, and the specific settings where prediction commonly fails. Fracture gradient and the mud weight window follow. Temperature and fluid prediction are then addressed. Lithology prediction and drilling hazard identification follow, covering losses, instability, shallow hazards, overpressured sands and hydrogen sulphide. Data acquisition programme design is then developed against the well objectives. The training closes with prognosis documentation, real-time updating and post-well analysis.
A prognosis should carry uncertainty, not just depths. A formation top predicted at two thousand five hundred metres is of limited use to a drilling team; the same top predicted at two thousand five hundred metres with a range of plus or minus eighty metres tells them when to start looking, when to slow down and when something has gone wrong. The uncertainty also drives decisions directly: casing points are set with contingency against depth uncertainty, and coring and logging programmes depend on knowing the range within which the target will appear.
Pore pressure prediction fails in characteristic situations, and knowing them is most of the skill. The standard approach infers pressure from the departure of velocity or resistivity from a normal compaction trend, which works where overpressure is caused by disequilibrium compaction in shales. It understates pressure where overpressure is generated by other mechanisms such as fluid expansion or gas generation, and it fails entirely for lateral transfer effects, where a dipping permeable body connects deep and shallow positions and carries deep pressure up to a shallow depth. The centroid effect is the classic version and it has caused numerous well control incidents.
The mud weight window narrows with depth and sometimes closes. Pore pressure rises and fracture gradient falls towards each other in many settings, leaving a narrow margin in which mud weight must be maintained, and in depleted reservoirs or beneath certain structures the window can effectively close. Predicting this before the well is planned determines the casing design, and discovering it while drilling determines whether the well reaches its target. This is a pre-drill analysis with direct and expensive consequences.
Finally, a prognosis is a live document. As the well drills, each formation top encountered, each pressure measurement and each drilling observation either confirms the prediction or shows where it was wrong, and the remaining prognosis should be updated accordingly. A well that comes in two hundred metres high at the first marker will likely be high at the target too, and acting on that at the time rather than afterwards is what keeps the casing points, the coring point and the data acquisition on plan.
By the end of this training, participants will be able to:
- Construct a stratigraphic prognosis from offset well and seismic data
- Predict formation depths and express the uncertainty usefully
- Predict pore pressure and recognise where standard methods fail
- Assess centroid and lateral transfer effects
- Predict fracture gradient and define the mud weight window
- Predict temperature and fluid type and properties
- Predict lithology and identify drilling hazards
- Design data acquisition programmes against well objectives
- Document a prognosis in a form the whole well team can use
- Update the prognosis in real time and conduct post-well analysis
The training is worked by building full prognoses for wells whose results are known but withheld. Participants predict the section, the depths with uncertainty, the pressures and the hazards, then compare against the actual result and identify the source of each error. Pore pressure prediction is practised in settings where the standard method fails, including a centroid case. Prognoses are documented to drilling team standards and defended. Post-well analysis is carried out on real wells that went badly.
Organisations sending participants to this training will:
- Reduce well control incidents from pressure prediction error
- Improve casing design through better pressure and depth prediction
- Reduce non-productive time from unanticipated hazards
- Improve data acquisition success through better depth prediction
- Communicate subsurface uncertainty effectively to well teams
- Capture learning systematically through post-well analysis
Participants will:
- Build complete and useful well prognoses
- Predict pressures and recognise where methods fail
- Express depth uncertainty in a usable form
- Identify drilling hazards before the well is planned
- Update predictions in real time during drilling
- Work credibly with drilling and operations teams
- Operations and wellsite geologists
- Exploration geoscientists preparing well proposals
- Well planners and drilling engineers
- Pore pressure specialists
- Petrophysicists designing logging programmes
- Geoscientists supporting real-time operations
- Technical staff reviewing well plans
Module 1 - Stratigraphic Prognosis
- Offset well selection and review
- Correlation to the proposed location
- Formation top prediction
- Thickness prediction and lateral variation
- Seismic constraints on the prognosis
- Unconformities and missing section
- Faults and expected cut-out or repetition
- Deviated and horizontal well prognosis
- Prognosis in areas with no offset wells
- Analogue use in prognosis
- Documenting the stratigraphic prognosis
Module 2 - Depth Prediction and Uncertainty
- Time to depth conversion for prognosis
- Velocity model construction
- Lateral velocity variation effects
- Depth uncertainty by horizon
- Expressing uncertainty as ranges
- Cumulative uncertainty with depth
- Uncertainty at the target
- Casing point depth contingency
- Coring and logging point uncertainty
- Communicating depth ranges to the well team
- Updating depth prediction while drilling
Module 3 - Pore Pressure Prediction
- Overpressure generation mechanisms
- Disequilibrium compaction
- Fluid expansion and gas generation
- Diagenetic and tectonic mechanisms
- Normal compaction trend construction
- Eaton and equivalent depth methods
- Seismic velocity based prediction
- Offset well calibration
- Direct pressure measurements
- Mud weight and kick history as evidence
- Prediction uncertainty and its expression
- Where standard methods fail
Module 4 - Centroid and Lateral Transfer
- Centroid concept and its mechanism
- Pressure in a dipping permeable body
- Crestal overpressure from deep charge
- Magnitude of the centroid effect
- Lateral transfer in connected reservoirs
- Supra-hydrostatic gas gradients
- Predicting the centroid effect
- Reservoir connectivity and its pressure role
- Depleted reservoirs and reduced pressure
- Shallow overpressured sands
- Well control incidents from transfer effects
- Managing the risk operationally
Module 5 - Fracture Gradient and the Mud Weight Window
- Fracture gradient concept and measurement
- Leak-off and formation integrity tests
- Minimum horizontal stress estimation
- Fracture gradient prediction methods
- Stress regime effects on fracture gradient
- Mud weight window definition
- Window narrowing with depth
- Closed window situations
- Depleted zone fracture gradient reduction
- Casing design implications
- Managed pressure drilling considerations
- Communicating the window to drilling engineers
Module 6 - Temperature, Fluids and Lithology
- Temperature gradient prediction
- Bottom hole temperature estimation
- Temperature effects on equipment and fluids
- Fluid type prediction from the petroleum system
- Gas oil ratio and composition prediction
- Hydrogen sulphide prediction and risk
- Carbon dioxide content prediction
- Lithology prognosis from offsets and seismic
- Hard and abrasive interval prediction
- Reactive shale and swelling clay prediction
- Evaporite and salt interval prediction
- Fluid and lithology effects on well design
Module 7 - Drilling Hazards and Data Acquisition
- Shallow hazard assessment
- Shallow gas and shallow water flow
- Loss zones and their prediction
- Wellbore instability prediction
- Stuck pipe risk intervals
- Salt creep and mobile formations
- Faults and their drilling consequences
- Hazard register for the well
- Data acquisition objectives
- Logging programme design
- Coring and sidewall sampling decisions
- Formation testing and sampling programme
Module 8 - Documentation, Real Time and Post-Well
- Prognosis document structure and content
- Communicating uncertainty to non-geoscientists
- Decision points and contingencies
- Pre-spud meetings and alignment
- Real-time monitoring and updating
- Formation top confirmation and revision
- Updating the remaining prognosis
- Decision making during operations
- Post-well prognosis against actual comparison
- Identifying the source of each error
- Learning capture and dissemination
- Improving prognosis practice over time
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.
