history - buffalo18 May 2021 14:24
from nexen 2004 10k filing...
https://www.sec.gov/Archives/edgar/data/16873/000095014205000617/form10k-2004.txt
Since first production in 1999, the Buffalo field, offshore northwest Australia, has produced 53(degree) API crude oil using a fixed wellhead platform linked to a leased floating production storage and off-loading vessel.
We produced our final barrel of crude oil in late-2004, and averaged 2,700 bbls/d before royalties of oil for 2004. Field abandonment began in November 2004 and is expected to be completed in 2005. There were no capital expenditures
in 2004, and other than abandonment expenditures, no further expenditures are expected in 2005 .
.......
This does tell us that they shut this off at 2700 bbls/d and had made no further efforts on this field since the infil drilling they did in 2002.
further historical research...
https://www.tandfonline.com/doi/pdf/10.1071/ASEG2001ab099
Buffalo Oil Field – Geophysical Success Under Big Bank
For Buffalo, and all nearby fields (Laminaria, Elang, BayuUndan, for example), the primary reservoirs are sandstones of
the Callovian (Mid Jurassic) Elang Formation (Figure 3). This unit is typically around 100 m thick and was deposited in
a fluvial - marginal marine - marine environment.
The discovery well, Buffalo-1, was drilled during September 1996 by BHP Petroleum and encountered a 45 m oil column
in good quality Elang Formation sandstones at approximately 3270 m sub-sea. A 27 m interval was production tested,
yielding 52.7o API oil at a stabilized rate of 11,790 stb/d. Buffalo-2, drilled in May 1997, 2.65 km to the east of
Buffalo-1, confirmed that the oil extends into the eastern part of the structure. Analysis of a 44 m core cut in the upper part
of the Elang reservoir confirmed the continuity of quality reservoirs, with porosities averaging 13 percent and
permeabilities ranging from 30 to 2500 millidarcies. Both wells were plugged and abandoned
Well results
Two of the development wells were within 1 m of prognosis at the Top Elang, confirming that the P50 (most likely) interpretation for the majority of the field was correct.