Tag: North Sea

UK North Sea Summary Part II: Reserves, Recent Production and Future Projections

George Kaplan 61 Comments
A Guest Post by George Kaplan

Reserves

The OGA issues UK oil and gas reserve values each year, but only in total, not for individual fields as is done in Norway, Mexico, GoM and Brazil (which reports by basin rather than field). The reserves are not backdated to discovery date so it’s not possible to generate anything like a true creaming curve, but they are split into categories of proved, probable and possible, and, since 2015, contingencies. Operators in the UK North Sea have up to five years to announce estimated resources in discoveries so there may be uncertainties for recent years, unlike in the Norwegian section where estimate must be declared as soon as they are known.

Read More

UK North Sea Summary Part I: Licensing, Drilling, Discoveries and Development

George Kaplan 65 Comments
A Guest Post by George Kaplan

Discoveries and Development

The global peak in oil and gas production for UK occurred in 1999 and 2000, probably delayed by four or five years by the Piper Alpha tragedy, and will not be approached, far less exceeded, again. There have been two other local peaks, each one preceded by about ten to twelve years by a local peak in the number of discoveries. The UK Oil and Gas Authority does not publish individual field resources, but it’s a fair bet that the large fields were discovered early on and most of the recent discoveries are small, near field tie-ins.

Read More

UK Offshore Production: Summary for First Quarter 2018

George Kaplan 172 Comments

A Guest Post by George Kaplan

UK C&C

It was expected by many, me included but more importantly UKOGA and a couple of the bigger oil and gas consultancies, that UK offshore oil production would increase significantly from 2017 to exceed 1000 kbpd for the yearly average in 2018. So far this is proving a bit of a challenge. March production was 934 kbpd, down 7% m-o-m and 2% y-o-y (but up 0.8% for the first quarter compared with 2017). It’s possible that some fields have not reported but those showing zero for the month are not big producers. The biggest single field drop came from Clair but most fields saw declines, even the newer ones. Jodi data indicates there will be a rise shown for April to slightly above 1000 kbpd and then a fall back to around March numbers in May (note edit based on July Jodi data); there is usually a summer dip because of maintenance shutdowns (plus this year some strikes at Total platforms will impact).

chart/

Two of the largest oil producers, Buzzard and the Golden Eagle Area Development, both operated by Nexen, have started accelerated decline following increasing water breakthrough (especially noticeable in GEAD over the past year). The newest large field is Scheihallion. This is a redevelopment with its neighbouring field, Loyal, through the Glen Lyon FPSO (also called the Quad 204 project), which was started last year. So far the combined decline in Buzzard and GEAD is almost matching growth in Scheihallion.

The Clair Ridge platforms, which will also exploit the remaining heavy oil in the Clair field, were installed last year but there have been multiple delays and production is not now expected until later this year. Once it is ramped up, which could take three or four years despite it having some predrilled wells, the project will be the largest producer at 100 to 120 mmbpd and has an eight year plateau, while Scheihallion/Loyal will plateau and decline quickly.

chart/
Read More

UK Offshore Production, 2017 Summary and Projections

George Kaplan 151 Comments

A Guest Post by George Kaplan

2017 trends for UK offshore production were disrupted by the stoppage in the Forties pipeline in December, which took several hundred thousand barrels of oil equivalent per day off line. Overall average oil production for the year dropped 61 kbpd (6.4%) and natural gas (including NGPLs) barely changed with an 800 boed drop. With the Forties issue exit rates don’t mean anything, but the running average oil production was on an upward trend in the second half of the year, which will continue through 2018, barring further major outages, while natural gas was noticeably declining and might struggle to maintain 2017s rate this year.

2016 reserve numbers fell for both oil and gas with few discoveries and some negative adjustments. Oil and gas production will decline from 2018, with accelerated falls from sometime in the mid-2020s without major new discoveries (which may include onshore shale gas, but that is not covered here).

UK C&C

chart/

chart/

Through 2015 and 2016 a lot of smaller, short cycle developments came on line as a result of the boom from the high price years from 2011. Now larger projects started in those years are ramping up. The largest is the Glen Lyon FPSO, which is part of a revamp of two mature fields: Scheihallion and Loyal. Additionally at the end of 2017 Kraken, Catcher (including Burgman and Varadero fields) and WIDP (for fields Harris and Barra) were started and will continue to ramp up through early 2018. Clair Ridge was commissioned in late 2017, it has dry trees and a single platform drilling rig; production will ramp up as the wells are completed (they may need to complete production/injection pairs before being able to produce from each block, which may slow things down a bit). Statoil’s heavy oil field, Mariner with nameplate 55 kbpd, will also start up in 2018, after some delays. The Captain field has started trials of polymer injection, which is intended to ramp up through 2021, and, if successful, will maintain current production rates at around 25 to 30 kbpd.

The availability from some of the larger, mature producers seems to be increasingly impacted by unplanned outages, possibly just due to chance or their age, but maybe also impacted by cost cutting in response to the price drop in 2015. Apart from the Forties pipeline issue, in January the Chevron-operated Erskine field was taken offline by a wax pipeline blockage while pigging, there have been a couple of instances of fields being partially evacuated because of water quality issues, and the Ninian platform was evacuated ahead of a major storm because of doubts over its structural integrity.

Mature Field Decline

chart/
Read More

Norway Oil and Gas: Reserves, Production and Future Projection

George Kaplan 115 Comments

A guest post by George Kaplan

Norwegian oil production peaked in 2000 to 2001; gas production may be peaking about now. Oil hit a low in 2013 and then recovered towards a new local peak, probably concurrent with the gas.

Drilling and Development

The most surprising thing I find with their industry is that the drop in oil price made almost no difference the drilling activity shown here (all data here and below taken from the NPD – Norwegian Petroleum Directorate – which provides more data than just about any other such organisation).

chart/

The chart shows numbers of wells drilled, as stacked bars, and number of operating rigs (unstacked) against the left hand axis, other curves are ratios of total against the right axis. Read More