Formation damage traced to contaminated completion fluids

Extensive compatibility tests determined the severity of the problem and developed preventive and remedial measures to deal with organic sludges that choked hydraulic fractures and the critical matrix in the producing reservoirs of the LL-652 oil field, in Venezuela.Organic sludges form when iron-contaminated completion brines are lost to the formation. Although this was believed to be the primary cause of the problem, other plausible damage mechanisms include dehydrated polymer gel damage in proppant packs, fines migration, and water blocks.LL-652 oil fieldChevronTexaco Overseas Petroleum Co. operates LL-652 oil field, in central-northeast Lake Maracaibo, Venezuela, under a 20-year opera...

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