Explained in Detail

Ephindo’s CBM development follows a number of stages

Exploration
Using seismic surveys we locate and assess the depth and extent of CBM bearing coal seams. Seismic waves reflected back from geological strata generate a three dimensional image of specific segments of the strata to show the size and extent of coal seams. From this information we can assess and plan the extent and number of wells needed to extract the CBM.

Extraction
A series of single vertical wells are drilled to depths of between 300 and 1500 metres below the surface to reach the coal seams. The coals seams are “stimulated” to open up the fissures and cracks within the coal deposits. This releases the pressure contained in the seam and a mixture of gas and water from the coal then flows into and up the well.

The wells are lined with cement to prevent ingress of water from surrounding aquifers and to ensure there is no gas or water leakage. The coal seams and strata of rock above and below are left undisturbed. At the surface the water is collected in a pond and recycled. The gas is treated to remove impurities and compressed ready for transmission by pipeline.

Minimal Mining Impact
Well depths are relatively shallow, requiring smaller rigs and consequently less disturbance to the immediate surrounding area.  Each CBM operation has an extensive formal environmental impact assessment survey conducted. Surveys cover the drilling and operation of each CBM field. During operations the pumping and processing facilities are minimal in their impact on the surrounding landscape.

Post mining operations, complete restitution of the site is carried out, including re-vegetation. Since the coal seams are left undisturbed, CBM development does not require extensive cutting of forest and vegetation, nor removal of overburden, or extensive sub surface excavation – nor associated dust and heavy vehicle usage.

Extensive Resource
Economic Future
Effective Energy
Explained in Detail

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