Camden gas project SIS drilling program update
Posted: 5 December 2006
Sydney Gas Ltd reported that the Camden Joint Venture successfully completed drilling the main branch of a second SIS well, Glenlee 15 (GL15), at Camden on 1 December 2006.
The well intersected the Upper Permian Bulli seam at the measured depth (MD) of 871m with an average thickness of approximately 4m.
Total length of the well is approximately 2,032m of which approximately 1,161m has been drilled horizontally through the coal seam. Earlier, the first SIS well GL14 was completed on 2 November 2006 after drilling 1,160m in-seam through the Bulli seam.
Both GL14 and GL15 SIS wells were drilled from the same surface location where a previous vertical well, GL10, is located.
It is anticipated that further application of this technique will allow commercial exploitation of gas reserves that would otherwise be difficult to access because of land use constraints.
GL15 has been drilled to test the horizontal production performance of the Bulli seam; nearby vertical wells have already demonstrated good production potential.
A higher flow rate and hence higher ultimate recovery is expected from a SIS well compared to a vertical well due to a larger drainage area to be swept by a SIS well. Reservoir simulation studies indicate well performance of 2-6 times that of a vertical well depending on reservoir heterogeneity.
To reduce overall cost per GJ and optimise the productivity of the nearby area, the Joint Venture plans to drill a new lateral of up to 500m for GL15 that will increase the in-seam length of the well and potentially remove the need for drilling an additional vertical well in the area.
Both the above wells along with earlier drilled directional wells LB11, GL16, GL12 and GL13 will be dewatered and production tested before being tied into the gas gathering system to produce gas to the Rosalind Park Gas Plant.
The Joint Venture is planning to drill additional SIS wells during this financial year, and is identifying locations where we believe the technology will be applicable.
AGL Energy Ltd is the operator of the Camden Gas Project in a 50-50 joint venture with Sydney Gas Ltd.
Posted by Richard Price, Editor, EnergyME.com
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