Press Esc to close



For full content view: Log in Now!

  • Lessons learned from CT stimulation of sour gas-producing wells at Ghawar field

    Mustafa R. Al-Zaid, Mohammed S. Al-Ghazal, Fadel Al-Ghurairi, Saad M. Al-Driweesh, Jose Vielma, Alejandro Chacon and Jose Noguera

    Coiled tubing (CT), acid stimulation interventions in openhole, multilateral wells represent one of the industry’s most challenging scenarios. Factors, such as a corrosion, CT limitations, steering tool assemblies and fluid placement, all require innovative solutions to maximize well productivity. In recent years, the number of openhole, multilateral wells drilled in Saudi Arabia has increased significantly. Consequently, this initiative has also increased the requirements for performing acid stimulations, and for enhancing well productivity. A solution to this problem needs to address the corrosion challenges associated with pumping high acid concentrations, in sour and high-temperature environments; reaching target depths, in multiple laterals, with complex well architectures; the use of effective steering tool assemblies to access multiple laterals; and the placement of acid stimulation fluid systems in target zones, across the open holes, to maximize well productivity. This article documents the engineering solutions developed to address these specific challenges.

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