Introduction
In order to ascertain whether a structure contains oil or gas, a well has to be drilled through it. One can get important information from the well, such as drill cuttings, cores and different logs.
From these data one can ascertain whether there is oil or gas in the well, and further information about the quality of the reservoir, If the results are promising, one or more zones in the well are sometimes tested – either with a wireline formation tester – so-called mini test – or a drill- stem test (DST). If the results of the test are good, more appraisal wells are drilled to map the extent of the field.
Primarily in this Basic Drilling Technology training course we emphasize the modern ways of drilling in a cost-effective approach while we explain how the field is thoroughly evaluated. This includes estimating the volume of hydro – carbons in the field, consideration of drive mechanism and the expected formation pressures. This forms the basis for the field development plan. Cash flow, capital and operating expenditure for the field are estimated following the drilling sequence and the production tests, so that the profitability can be considered. If the economic evaluation of the field seems positive, it is deemed commercially viable and can therefore be developed.
This Basic Drilling Technology training course will clarify in-depth the drilling of Exploration wells. Also, we meet other terms for these wells like Wildcat, Appraisal wells, Development wells or production wells. During the training course the drilling rigs will be presented together with full description of basic components of the rig.
The Basic Drilling Technology training course will feature:
- Introduction to special drilling for highly deviated wells or horizontal ones and the practical means and tools to achieve these demanding works.
- Estimated TD, production potential.
- Geological prognosis considerations prior to start drilling activities
- Casing and cementing design
- Coring and open hole logging
Course Objectives
By the end of this Basic Drilling Technology training course, delegates will learn:
- Differences of Drilling onshore or offshore and the influence in the cost of well
- Describe the inherent risks while drilling and need for careful on time diagnostics, action under good supervision for safe drilling.
- Describe the possible implications while drilling high pressures zones.
- Selection of proper drilling fluid for each section of the well to be drilled
- Mud logging services
- List and describe the surface drilling equipment requirements; BOP, D/P and accessories
- Describe well pressure control and safety issues originated from geological anomalies
- Well control and circulation methods to kill the well
- The running of Open hole logging per each drilled section
Who Should Attend?
This Basic Drilling Technology training course is suitable to a wide range of professionals and will greatly benefit:
- Drilling Engineers
- Drilling Supervisors
- Drilling Foremen
- Production supervisors and foremen
- Completion supervisors and engineers
- Workover and well service supervisors
- Service Co engineers
- Economists and procurement engineers
- Geologists
- Mud engineers
- Mud technicians
Course Outline
Pre-Drilling Considerations
- Reservoir Considerations
- Work program
- Permission to Drilling
- Cost and time estimate
- AFE Approval
- Rig Selection according to type of the well and estimated TD
- Description of rig components
- Provision of materials
- DST considerations and or completion requirement
- Pad preparation for rig reception.
- Offshore cases
Drilling Design
- Pore pressure calculations
- Geological prognosis
- Drilling Fluids program
- Casing and cementing design
- Coring services
- Open hole logging per section drilled
- Personnel and supervision
Actual Drilling Operation
- Drilling monitoring
- Minimum Drilling Parameters required
- Bits selection
- Drilling problems
- Technical accidents
- Circulation losses
- Pipe stuck
- Fishing operations
- Cement plug around lost in hole pipes
- Kicking over fish and continuation of drilling
- LOT and FIT tests
- Secure section drilled by running casing prematurely and cement in place
Well Control Procedures
- BOP stuck
- Kick problems
- Well Killing operations and methods
- Flow checks and pore pressure estimation
- Cement plugs
- Contingency plan and deviation from original program
- Amendment program for drilling continuation
- Liner running procedures
- Well testing, DST and evaluation of pay zone. Completion preparations if development well
Special Drilling Applications
- Highly deviated wells
- Horizontal wells
- Logging while drilling (MWD), (LWD)
- Under balance drilling
- Drilling with air
- Drilling with foam
- Drilling Reports
- Mud logging services when necessary
- Suspension of the well till completion
- Final abandonment if the well is dry
- Rig release
- Final report. Post drilling summary
- Economics and comparison versus estimated ones