CONTROLLED RETRACTABLE IGNITION POINT (CRIPS)

Underground coal gasification is achieved through the drilling a series of wells that utilise the latest long reach and horrizontal drilling and completion techniques borrowed from the oil and gas industry. The production well is, in drilling terms the simplest, collecting the produced gas and bring it back to our surface facilities.

The injection wells are typically long reach will considerable horrizontal sections through the coal seam of up to five hundered metres. The gasification reactor is initiated close to the production well. The injection well is completed with a simple slotted liner and an ignition source run in to the well on coiled tubing, similar to the way an oil well would be perforated. Depending on the use of the gas (either power generation, or diesel) As the reaction progresses, more coal is gasified and the reactor cavity grows around the ignition point. As coal is depeted the ingition point is withdrawn and the process begins again further from the production well.

CRIPS >>				LONG WALL (CRIPS) >>
		For the bulk of our UK assets BCG Energy will be using a modified CRIPS Gasification method in a six well template, four of these wells will be used for injection, one for production and another for CO2 sequestration.				The geology ofsome seams may allow us to use a Long Wall CRIPS method where by two parrelll wells are drilled, one injection and one production, gasifiaction then takes place alone the lcoal face between both wells, rather than arround a single well.