BG Group Upgrades Ngisi Gas Discovery

Africa-focused Ophir Energy announced Wednesday that the Ngisi-1 appraisal well, operated by BG Group, has successfully found further gas pay in Block 4, offshore Tanzania.

The Ngisi-1 well was drilled by the Deepsea Metro 1 (UDW drillship) approximately three miles northeast of the Chewa-1 well. The Ngisi-1 well was designed to appraise the Chewa gas discovery drilled in 2010 and to penetrate the Ngisi exploration prospect.

Ophir reported that gas pay was encountered in the Ngisi prospect within a high net-to-gross reservoir interval, while penetration into the Chewa reservoir also encountered gas pay as predicted and confirmed widespread, excellent reservoir characteristics.

As a result, said Ophir, the mean recoverable resources of the Chewa-Pweza-Ngisi hub has been increased from 3.7 trillion cubic feet to 4.5 tcf.

Ophir added that the drilling result has also further demonstrated the feasibility of drilling highly-deviated wells, which will be incorporated into development planning of the assets. Ophir and BG Group successfully drilled their first deviated well in December 2012 in the Jodari Field.

Ophir CEO Nick Cooper commented in a company statement:

"The successful Ngisi drilling results provide critical mass for the aggregation and development of the gas discoveries in Block 4. These will be piped ashore and combined with the Block 1 resources for Tanzania's LNG development."

The Deepsea Metro 1 drillship will now drill the Mkizi-1 exploration well in Block 1. Mkizi is a 0.6 tcf prospect of Tertiary age.


Have a news tip? Share it with Rigzone!


Click on the button below to add a comment.
Post a Comment
Generated by readers, the comments included herein do not reflect the views and opinions of Rigzone. All comments are subject to editorial review. Off-topic, inappropriate or insulting comments will be removed.

Related Companies
For More Information on the Offshore Rig Fleet:
RigLogix can provide the information that you need about the offshore rig fleet, whether you need utilization and industry trends or detailed reports on future rig contracts. Subscribing to RigLogix will allow you to access dozens of prebuilt reports and build your own custom reports using hundreds of available data columns. For more information about a RigLogix subscription, visit

Our Privacy Pledge

More from this Author
Rigzone Staff
e-mail us at
 -  Aker Solutions to Buy Brazilian C.S.E (Oct 21)
 -  Sea Trucks Group Secures Work Offshore... (Oct 21)
 -  Shell Divests Non-Core Oil, Gas Proper... (Oct 21)
 -  Petrofac Appoints New CFO (Oct 21)
 -  Wheatstone LNG Development Start-Up in... (Oct 20)

Most Popular Articles

From the Career Center
Jobs that may interest you
United States Sonora: Operator, Plant-Multi-Chem, I
Expertise: Geoscience Technician
Location: Sonora, TX
United States Sonora: Operator, Plant-Multi-Chem, I
Expertise: Geochemist
Location: Sonora, TX
Senior Client / Program Manager
Expertise: Geologist|Reservoir Engineering
Location: Seattle, WA
search for more jobs

Brent Crude Oil : $50.79/BBL 1.30%
Light Crude Oil : $49.96/BBL 1.10%
Natural Gas : $2.77/MMBtu 2.12%
Updated in last 24 hours