Objective
The aim of the project is to demonstrate the feasibility of Underground Coal Gasification at intermediate depth (500-700 metres) in European coals, as the first trial of a European UCG programme. Deviated and in-seam drilling will be used for gasifier construction, and different techniques for gasifier control and development will be tested.
The first important results were the achievement of directional drilling along the coal seam and the placing of the production well to provide good gas connection. Temperature and corrosion control has been an essential component of the well completion and a retractable injection and ignition system for the in-seam well has been demonstrated to work well in the first gasification test. The sub-bituminous coal ignites easily and a substantial cavity sweep has been achieved around the first point . Further success will depend on the ability to control and handle water ingress.
The project has three main phases of activities.
1. PREPARATORY STAGE
During this stage, the geology of the selected site is evaluated, and an analysis of the coal and adjacent strata obtained via exploratory boreholes. The major activities of this phase are the drilling, linking, completion of the process wells, and installation of surface plant and equipment.
2. GASIFICATION ACTIVITIES
The gasification stage will enable the influence of different well configurations to be determined and different gasification scenarios (channel gasification, filtration gasification) to be compared. During the test of long duration, specific parameters, such as reactor lifetime, cavity growth mechanisms, sweep efficiency, energetic efficiency, gas quality, etc., will be determined.
3. POSTBURN ACTIVITIES
The activities during the postburn stage primarily consist of analysis of the data obtained in order to validate and, if necessary, modify gasification models. These activities will be supportedby postburn drilling to verify the cavity shape. Finally, reporting and site restoration will conclude the activities of the field test.
The well layout includes deviated and vertical wells for exploration, process and monitoring.
The layout includes :
- 3 vertical exploratory well.
- A deviated injection well drilled to achieve a horizontal length of 100 metres in the coal seam.
- A vertical production well which be connected to the deviated injection well.
- A second (vertical) injection well drilled at a distance of 30 metres from the in-seam section of the deviated injection well.
- A deviated monitoring well.
This scheme allows the successive realization of two gasification tests :
- a first test along an in-seam channel;
- a second test by filtration, between the lateral injection well and the area already gasified.
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Programme(s)
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Topic(s)
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Funding Scheme
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
44550 Alcorisa
Spain
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.