Matra Petroleum exploration update
Posted: 13 December 2006
Matra Petroleum plc provided an update to the exploration activities on its 100 per cent owned Inke Concession in Hungary.
Work completed on the 2D and 3D seismic data within the Inke Concession and the application of the latest seismic imaging techniques has allowed Matra to define two prospects for drilling in early 2007.
This acquisition of new seismic in early 2007 is expected to lead to further drilling towards the end of next year.
The new 3D processing has enabled Matra to more clearly identify channel sands, and where these sands spill over the shelf edge, providing fan type sand deposits and traps deeper in the basin.
The existing 2-D seismic data (outside of the 3-D area) confirms examples of these fan sands draping over underlying highs to form simple anticlines and pinching out to form stratigraphic traps against older structural highs.
“The work completed is an excellent example of applying the latest technology to existing seismic data,” said Peter Hind, Matra’s Managing Director.
“Not only has it allowed us to identify two drilling targets but it has also allowed us to upgrade the prospect inventory on the rest of the block.
“Together with the two-year extension to the concession granted earlier this year, this recent work has allowed us to develop a more aggressive exploration programme for 2007. Subject to exact rig availability, we expect to have started drilling again and to have acquired further seismic data by the end of the first quarter of 2007 which will allow further drilling later in 2007.”
The Horvatkut-1 well, planned for early 2007, will appraise an existing gas discovery that tested gas from two horizons in the Somgysamson-3 well in 1983.
Three potential reservoirs are targeted by this well. The targeted Main Sand tested gas at a rate of 1.27mmscfd in the Somgysamson-3 well (drilled by a previous operator of the concession) but the reservoir was concluded, by the previous operator, to be badly damaged and therefore potentially capable of higher rates.
Additionally the improved seismic imaging shows that this section thickens in the direction of the proposed well location.
Two tests in the Volcanics reservoir of Som-3 each tested gas at 0.27mmscfd and again these intervals were concluded to be damaged. The Upper Sands appear on electric logs of previous wells as multiple thin stacked sands that may be gas bearing but were not tested.
The target horizons are predicted below 1500m and the well will be drilled to a total depth of approximately 1800m.
The application of the latest seismic imaging to define the potentially best reservoir location combined with modern drilling techniques to minimise formation damage and modern logging should combine to reduce the risks associated with encountering a commercial gas reservoir.
Marcali-1, Matra’s second planned well, is located within a sand channel clearly identified by recent 3-D imaging and is within a mapped structure based on the remapped 3-D data.
The Amplitude Variation with Offset (AVO) analysis of the 3D shows a Direct Hydrocarbon Indicator (DHI) over this prospect.
This technique has proved successful in many parts of the world.
Whilst the presence of gas may only be demonstrated by drilling, this technique provides an example of how modern seismic techniques may reduce exploration risks and may have significant implications for the rest of the block.
The target horizon is predicted at approximately 1200m and the well will be drilled to a total depth of approximately 1350m.
This review has provided for an updated inventory of prospects on the Inke Concession and has encouraged Matra to acquire further modern seismic in areas within the block but outside the existing 3-D area.
The application of the techniques used to define the next two drilling prospects within the 3-D area may then be used to fully define and to reduce the risks associated with further drilling.