dspp wrote:pijoe1212 wrote:dspp wrote:
WM,
At present the evidence for the depth of the oil column in Lancaster is rather tentative. Initially HUR postulated 600m or so, and no water production. Unfortunately the very substantial water production from a depth that would appear to be only 300m or so below reservoir top is causing concern. So the effective ('workable') oil column may only be of the order of 300m deep.
Add in the not very good flow from deeper in the Lincoln & Warwick reservoirs and one begins to wonder at the quality of the deeper reservoir. Then look at the relatively poor PI in Lincoln Crestal. By the way the Bach Ho model has indications of this, but it does at least appear to be workable (developable) down to deeper than we have seen so far in any of the Rona.
This all tends to make me wonder about whether there is a layer of usable fractured basement on the top/outside of the Rona structures, but not deeper. So I was wracking my brains for where I know of a relatively thin fractured field overlaying less good stuff, with a decent aquifer. And Auk popped into my mind. As an analogue it is also comparable viscosity and GOR so that makes the fluid flow implications comparable. However I wouldn't want to stretch the analogue too far, these things are never quite like that. Nevertheless that production history graph may give those with little understanding of the implications of cutting water (but still being productive) a better understanding of what could be in store for the future. Hence the concerns.
regards, dspp
i do not have the documentary evidence any longer, nor can i recall the detail, but i think you will find comparables in Zeit bay. not sure what was published at the time or after. i worked to operator provided well data, which was reviewed and processed for process facility engineering input (around 86-88 time period).
Thanks PJ.
I'm very much open to all suggestions of relevant analogues, whether FB or from any other setting (as other settings can still have relevant lessons).
What would be good is if HUR could drag all the analogues out of the cupboard, obtain access to all the relevant published papers etc, and post them up on the HUR website. It ought not to be a bunch of PIs scraping around on the internet. HUR need to get onto the front foot and realise that they need to sell their story to a by-now increasingly sceptical audience. Or else the train set will not be in their hands indefinitely.
regards, dspp
just a quick thought based on a comment on the looney bin BB (but noting a few posters are actually ok peeps! evening AD!). gas re-injection has been dismissed to date. i understand why. however in a downside case (watery well replaced with 8 well and spirit gone walkabout) and IMV by default HUR is on a lone path to be a c.20K bls producer only as a reuslt..is gas re-injection an option rather than WOSP tiein?
i am not trying to introduce more negatives - i see this as a potential positive to mitigate a negative (water) situation..