New fracture closure-stress calculation leads to improved proppant selection

A proposed calculation of in situ closure stress allows engineers to select more appropriate proppant.For decades, the calculation for in situ closure stress on proppant has involved subtracting flowing bottomhole pressure (FBHP or estimated FBHP) from minimum horizontal stress. Using these results, engineers have selected proppant based on its tested and published strength to withstand being crushed severely or completely.But this traditional calculation leads to an incorrect and low closure-stress value.The author believes that in situ closure stress on the proppant in the fracture should never be less than the closure pressure or minimum horizontal stress of the formation (determined a...

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.

Stay Connected