RE: Interesting19 May 2022 23:46
SpeedF,
With regard to the cpr there really is a lot going on.
My reading of the situation based on the limited published data for each reservoir is as follows.
1. The A sand had been expected to pinch out towards the anchois north fault, but in fact was encountered at the anchois 2 well location and recovered gas . The last map showed the reservoir extending to the anchois north fault and continuing into anchois north. Increase from audited reserve expected.
2. Sand B , an extra 25 meter net gas pay sand encountered not previously included in audited reserves. A review of the seismic profile does indicate to me that extra B sand is not latterly extensive across the field, so will need to be re mapped and possibly seismic reprocessed to map fully. Extra reserves not included in audited reserves .
3. The C and M sands have more sands packages than prognosis , likely that some of the extra 50 meters of net pay are in this package zone. Seismic to be reprocessed to laterally map thin reservoir packages. Extra reserves not included in audited reserves to be added here. Clearly these sands also extend into anchois north and can be classified as probable proven reserves in anchois north.
4. The sand comprises of two reservoirs instead of the forecast one reservoir. While gas was found in a small part of the O sand, it looks like it encountered a gas water contact. A review of the seismic profile indicates that the anchois 2 well located may have entered the O sand in a separate fault compartment , and hence down dip the O sand has a separate gas water contact and is mostly gas filled as per the Avo And spectral decomposition maps. I suspect this is the area that reserve auditors require additional work before signing off on gas downdip.
With seven reserveroir sands , it struck me as odd that they mapped seven gas water contacts , which would indicate sealing shales between each reservoir, I suspect they have been too conservative in their interpretation but more time and analysis us required before signing off on further upside.
So lots of good news but more work to do to finalise .
Jimmy