Press Esc to close



For full content view: Log in Now!

  • 4D seismic drives development geosciences for continued success of Forties field infill drilling

    Philip Rose, Gregg Barker, Klaas Koster and Jeff Pyle

    The Forties field in the UK Central North Sea was purchased by Apache from BP in 2003, at which time it was a giant field in the decline phase of its life. Annualized average production was 41,000 bopd and declining. No new wells had been drilled since 2001, when the previous BP drilling campaign was cancelled. This was a long way from the glory days of the early 1980s, when the field was producing between 400,000 and 500,000 bopd. By 2003, the field had produced a cumulative 2.5 billion bbl of oil, out of an in-place volume between 4.2 to 5 billion bbl, and the field was sold with 144 MMbbl of remaining reserves. Since then, Apache has tested over 100 drilling targets, made over 80 production completions and four injection completions. As a result of the Apache drilling campaign, the annualized average production rate has been held close to 60,000 bopd since 2005, and Apache has produced over 150 MMbbl from the field, of which 75 MMbbl have been produced from Apache-drilled wells. Currently, the field produces between 50,000 and 70,000 bopd, with over 70% from Apache-drilled wells, Fig. 1. Going forward, there is a dynamic, constantly evolving target portfolio, the strength of which has allowed the new 18-slot Forties Alpha Satellite platform to be commissioned for installation in 2012.

This area of the site is restricted. In order to gain access, please either Log In, or subscribe to World Oil.

Two options are available to you for creating an account.

1. Get a Free Trial Subscription to World Oil Magazine and gain immediate access to select content on World Oil Online.

Start a Free Trial Subscription and gain immediate access to the complete current issue of World Oil Magazine. Plus, you’ll receive 3 upcoming issues of World Oil Magazine in print or digital format.* You also receive access to the Energy Events Calendar, Industry Statistics and WO Wire’s news and industry coverage.

Free Trial

2. Purchase a subscription to World Oil magazine and gain immediate and complete access to World Oil Online. As a Total Access subscriber you will have access to all areas of the site available to registered users and free subscribers as well as having access to such premium content areas as:

  • The Archives section containing over ten years of complete magazine archives,
  • The WO DataHub's engineering tables and directories,
  • The World Oil annual forecasts, including past predictions,
  • Select World Oil technical handbooks,
  • And much, much more!


Physical copies of this content may be available for purchase. Visit the Reprints & Back Issues section.

If you are already a paid subscriber and do not have access, please email



Engineering Data Tables

World Oil's specialized upstream Engineering Data Tables featuring the Drill Bit Classifier, Tubing Tables and more. Get Total Access today.


2013 Fracturing Technology

2013 Fracturing Technology