Stay Connected

ESTIMATING DRILLING COSTS-2: Indices describe complexity of drilling directional, extended-reach wells

08/13/2007
Using indices to describe and compare drilling complexity and analyzing the efficiency of the energy applied to formations while drilling can improve performance.The first part of this series reviewed the two main predictive models used to evaluate drilling costs in the US Gulf of Mexico: the joint association survey (JAS) and the mechanical risk index (MRI; OGJ, Aug. 6, 2007, p. 39).This second part of the survey on drilling cost and complexity estimation models reviews the indices used to characterize the complexity of drilling directional and extended-reach wells: the directional difficulty index (DDI) and difficulty index (DI).This article reviews the structural basis of the models an...
read-story

Why Register?

Non-subscribers can only view whitepapers by providing name, home and email address, phone number and other information and comment on/rate articles.

Why Subscribe?

Oil & Gas Journal subscribers with login credentials can access these premium features of OGJ Online:

  • Current Issue – an html version of the current week's issue of Oil & Gas Journal.
  • Past Issues – An Electronic OGJ Archive. A keyword-searchable archive of all issues of Oil & Gas Journal dating back to 1990; also searchable by issue date.
  • Market Journal – a weekly round-up of the oil and gas markets, with observations from leading analysts.
  • Editor's Perspective – a short article of insight and opinion by the Editor of Oil & Gas Journal.
  • OGJ Industry Stats – quick access to current industry statistics from Oil & Gas Journal.
  • OGJ Survey Downloads - quick access to exclusive reports from Oil & Gas Journal.

 

Subscriber Help or Subscribe

Oil & Gas Journal Subscribers: Have your subscription number (from the mailing label on the cover of your Oil & Gas Journal) and e-mail address ready to set up your online account through Customer Service Assistant.

If you're not an Oil & Gas Journal subscriber, start a subscription and gain access to the subscriber areas of OGJ Online now.