Amersfoort Project

image/svg+xml 56ER 80TCPappl. 271ERappl. 38ER 270ERappl. 270ERappl. 64TCP MAJUBA PS4,100MW AMERSFOORT VOLKSRUST 400 400 400 400 400 400 765 400 0 20 40 60km KA-11PT KA-07PT KA-05PT KA-03PT KA-03PT2 KA-10PT KA-06PT KA-04PT Click on these icons to view videos Pilot Wells Exploration core andpercussion drill holes Power Stations Drill hole defined gaszone and expansion Lilly Gas Pipeline HV Powerlines Legend:

KA-03PT was named “The Beast” because of the roar of high pressure gas in the flare stack. This is a video of Kinetiko Energy Limited pilot test KA -03PT shot during daylight flaring. The second video of KA-03PT is of the initial gas flowing from shallow sandstones during testing of the upper part of the hole.

The hole was drilled to a depth of 370m and cased and cemented to a depth of 150m. with a production open hole interval between 150 and 370m. Casing and cement was set to 150m. Gas and water flow performance from the well suggests that much of this early gas production is from the sandstones and that over a longer period of dewatering the coal seam contributed component will increase.

Initial flows of gas were in excess of 350,000 scf/day. This well has been flowing gas at commercial rates continuously for over 9 months and has produced over 2.2 million scf of gas. With the low cost of drilling and equipping these basic wells, the cost of this well would have been recouped in less than 6 months if the gas had been sold at prevailing South African gas prices.

KA-03PT2 developed shut in gas pressures of over 145 bar however water unloading from a fracture in the sandstones meant that hydrostatic pressures could not be unloaded completely with pumping. Despite water levels in the hole providing a hydrostatic head of over 200m gas flowed spontaneously with no water pumping at a rate of 24,000scf/d for a test period of 7 days. A work over solution at a future time to cement the water producing fracture would likely see this well begin to produce at a much higher rate.

This is a video of Kinetiko Energy Limited pilot test KA -0PT5.. Although the well flowed enough gas to flare there was little pressure build up. While this is indicative of the presence of gas the lack of pressure was interpreted as being due to diversion of gas from deeper in the hole into shallow sandstones intersected in an adjacent core hole. Cementing back of the nearby core hole and redesign of the cemented casing depth in a new pilot well in this vicinity is indicated.

Gas flowed spontaneously from KA-06PT prior to water pumping. The well was subsequently operated with pumping for a test period of 12 days with flow rates of around 10,000scf/d. Shut in pressures indicate a reservoir pressure in excess of 16 bar indicates which is very encouraging for further drilling in this locality. The first video shows gas flaring spontaneously during drilling. The second video shows flow flare testing a day after a pressure shut in test.

Shut in pressures of nearly 17 bar were obtained in KA-07PT and gas was successfully flared. However despite the high reservoir pressures the gas flow was minimal over a test duration of several weeks. This indicates a local problem with dolerite compartmentalisation allowing only a small zone of gassy sandstone and coal seam to feed the well. However the reservoir pressures are again very encouraging and it is anticipated that other test wells in the locality have a high probability of producing significant and sustainable gas flows.The videos show the pressure build up test and the production test flaring.

KA-10PT was drilled to a depth of 440m and flow tested for four days. The well was flowing consistently above 50,000scf/d and rising but problems with well control instrumentation and pumping caused the test to be terminated. These very encouraging results however indicate that additional test wells in the area are likely to produce substantially higher flows with longer testing periods. The first video shows the well flaring, the second shows the flare and then the real time data collection on the flow skid.

Pilot test well KA-11PT was located in the northern extremity of the Amersfoort exploration right . Gas flowed spontaneously from the well when the gas discharge line was opened during drilling to test for gas, this was flared as shown in the video. However the quantity of water influx to the hole made it impractical to conduct a protracted production test. The very high quality of the water suggests that the drill hole is allowing shallow near surface water to flood the hole. This may be due to near surface fractures unloading into the well. A deeper casing set in a nearby location may be successfull.