Press Esc to close



For full content view: Log in Now!

  • Passive surface geochemical survey leads to dry gas discoveries

    A. Viforeanu, W. Wells and J. W. Hodny

    A surface geochemical exploration method that uses a passive hydrocarbon sampling technology has been successful in locating several dry gas deposits in the Transylvanian and Carpathian mountains of Romania. The method is designed to detect organic compounds larger than methane, even though, by definition, dry gas is composed primarily of methane. Since there are numerous noncommercial sources of methane, including near-surface sources, relying solely on methane measurements could lead to unproductive drilling. For the most accurate results, the Romanian surveys focused on locating ethene (an olefin hydrocarbon) and heavier hydrocarbons, compounds found in conjunction with methane in dry gas. Although these compounds constitute only about 1% of the gas that was being explored for, they are important components of the geochemical signature and model. Hydrocarbon samplers were placed in the exploration areas and near existing wells – both producing and dry – to develop a geochemical pattern against which samples from the exploration areas could be compared.

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