Aurelian Pleased With Results from Trzek-2
Aurelian Oil & Gas has announced that the pilot section of the Trzek-2 well in its Siekierki Tight Gas project has now been completed and the sidetrack to drill the horizontal section has commenced.
It said the results confirmed a 100.4 metre gas column and indicated both improved reservoir porosity and permeability, which further de-risked its Siekierki tight gas project and vindicates the company's internal technical methodology for predicting 'sweet spots'.
The pilot was drilled to obtain vertical control of the well and information on reservoir properties. Two cores were obtained in the gas bearing section and pressure data and wireline logs were obtained across the Rotliegendes to total depth at 4079m.
It said Trzek-2 wireline logs and cores confirmed better porosity, improved gas concentration and a zone of better permeability compared to Trzek-1.
Analysis of the data shows improved reservoir properties compared to Trzek-1 and other wells drilled in the Siekierki structure. Summary parameters are gas column 100.4m (Trzek-1 - 91m) net reservoir within gas column 94% (Trzek-1 - 88%), maximum porosity 18.4% (Trzek-1 - 16.2%) average porosity 11.5% (Trzek-1 - 9.5%) gas saturation at top reservoir 69.9% (Trzek-1 - 66.5%).
In addition, although most of the section is tight as expected, a zone of better permeability has also been encountered close to the base of the gas column. This zone is expected to thin and rise towards the centre of the column to coincide with the location of the planned horizontal well.
The horizontal sidetrack drilling is to encounter the Rotliegendes 300m from the current well and to drill up to 1500m horizontally in the reservoir.
Current plans call for Halliburton to undertake a 10 stage hydraulic fracture along the wellbore but this is subject to revision on the basis of data to be obtained during the drilling of the horizontal sidetrack.
Aurelian said that it envisaged that the Trzek-2 Frac and Flow Test will be completed during December, in line with the original schedule and budget of €18.2 million.
It said the results confirmed a 100.4 metre gas column and indicated both improved reservoir porosity and permeability, which further de-risked its Siekierki tight gas project and vindicates the company's internal technical methodology for predicting 'sweet spots'.
Source: Aurelian Oil & Gas