Vanoil sees Sudan-like features on Rwandan seismic

By OGJ editors

Vanoil Energy Ltd., Vancouver, BC, said that 2D and 3D seismic to be shot in the second and third quarters of 2012 will lead to more advanced reservoir characterization techniques being applied for the purpose of choosing an optimum drillsite on blocks 3A and 3B in Rwanda.

Vanoil in 2011 contracted Sproule International Ltd. and Geoseis Inc. to interpret 2,850 line-km of seismic data. The data included 2,000 line-km of legacy seismic shot in 1975 by Chevron that has proved to be of immense value after reprocessing for structural analysis but lacking the offset range for amplitude analysis.

Vanoil acquired 850 line-km of prospect grade seismic data in 2010 and 2011 at a cost of $8.5 million that has adequate offsets for the purpose of mining geological data from seismic amplitudes. The data have been relative amplitude and amplitude versus offset processed by Statcom Ltd.

Structural leads identified by Sproule and Geoseis are coincident with some of the AVO anomalies. This correlation has derisked and ranked the Sproule-identified 27 leads. The complete seismic data set has been further subjected to advanced reservoir characterization techniques ranking the 27 leads by their fault sealing and hydrocarbon charge attributes.

This has led to delineation of a 1,700 sq km area on the south and southwest flanks of the South Anza basin. The area is an analog to the Melut basin in Sudan and is characterized by 15 leads that are grouped into eastern, southern, and western lead areas.

The eastern lead area bears strong similarities to Adar-Yale oil field in Sudan. It is composed of a string of six leads that start from the South Anza basin depocenter up along rollover structures and ending on a horst block of a Karoo graben. Stratigraphic sequence analysis of seismic data and correlation near the Bahati and Endela wells, which are 15 km from east focus leads and 20 km from the western focus leads, respectively, clearly correlates the likely source and possible reservoir facies.

This is a fundamentally different interpretative approach, AAPG approved, from past practices due to advent of seismic sequence and facies analysis techniques in the 1980s. The structural considerations alone have been the criteria for choosing drillsites in past failed exploration programs, Vanoil said.

In order to properly place the more than 75 sq km, $3.5 million 3D seismic survey on one or two of the 15 leads, a 78 km, $800,000 2D seismic survey has been designed and shot in Block 3B along a string of six leads identified 15 km from the Bahati well. The 2D survey was to be shot in the last quarter of 2011, but heavy rains and adverse health and safety issues led to its postponement.

Related Articles

Tullow Oil provides production update on Jubilee, other fields

07/01/2015 Tullow Oil PLC reported that gross production for the Jubilee field offshore Ghana averaged 105,000 b/d in this year’s first half, up from 102,000 ...

Security through change


At the start of this month the US Army published its "Energy Security & Sustainability (ES2) Strategy" report. 

Mubadala starts production at Nong Yao in Gulf of Thailand

06/29/2015 Mubadala Petroleum, Abu Dhabi, started production on June 17 from its Nong Yao oil field in the G11/48 concession of the southern Gulf of Thailand.

OGJ Newsletter


Junex provides update on Galt oil property drilling

06/26/2015 Junex Inc., Quebec City, Que., said it is finalizing construction of the surface drilling pad for the Junex Galt No. 5 horizontal well that the com...

Lundin spuds three wells offshore Norway

06/24/2015 Lundin Norway AS, a wholly owned subsidiary of Lundin Petroleum AB, spudded three wells: its second Alta appraisal well in the Barents Sea, an appr...

WPX Energy adds to acreage in Gallup oil play

06/22/2015 WPX Energy Inc., Tulsa, has added to its San Juan Gallup acreage in New Mexico with the purchase of another 14,300 net acres from an undisclosed se...

YPFB Andina makes oil discovery in Bolivia’s Boqueron field

06/22/2015 YPFB Andina reported an oil discovery in Boqueron field in Bolivia’s Santa Cruz region. The Boqueron 4D well reached a total depth of 3,237 m and h...

Watching Government: Considering energy R&D

06/22/2015 Moving from research to development (R&D) became a recurring question as the US Senate Energy and Natural Resources Committee considered 43 sep...
White Papers

Definitive Guide to Cybersecurity for the Oil & Gas Industry

In the Oil and Gas industry, there is no single adversary and no single threat to the information tech...

UAS Integration for Infrastructure: More than Just Flying

Oil and gas companies recognize the benefits that the use of drones or unmanned aerial systems (UAS) c...

Solutions to Financial Distress Resulting from a Weak Oil and Gas Price Environment

The oil and gas industry is in the midst of a prolonged worldwide downturn in commodity prices. While ...
Sponsored by

2015 Global Engineering Information Management Solutions Competitive Strategy Innovation and Leadership Award

The Frost & Sullivan Best Practices Awards recognise companies in a variety of regional and global...
Sponsored by

Three Tips to Improve Safety in the Oil Field

Working oil fields will always be tough work with inherent risks. There’s no getting around that. Ther...
Sponsored by

Pipeline Integrity: Best Practices to Prevent, Detect, and Mitigate Commodity Releases

Commodity releases can have catastrophic consequences, so ensuring pipeline integrity is crucial for p...
Sponsored by

AVEVA’s Digital Asset Approach - Defining a new era of collaboration in capital projects and asset operations

There is constant, intensive change in the capital projects and asset life cycle management. New chall...
Sponsored by

Transforming the Oil and Gas Industry with EPPM

With budgets in the billions, timelines spanning years, and life cycles extending over decades, oil an...
Sponsored by
Available Webcasts

Better Data, Better Analytics, Better Decisions

When Tue, Oct 27, 2015

The Oil & Gas industry has large amounts of data stored in multiple systems which are purpose built for certain tasks. However, good decisions require insights based upon the data in all of these systems. These systems in turn do not talk to each other. So the process of analyzing data, gaining insights, and making decisions is a slow one and often a flawed one. Good decisions require accurate analytics and accurate analytics require superior/sustainable data quality and governance. This webinar focuses on:

  • The importance of data quality and governance
  • How technological advances are making data quality and governance sustainable in order to get the accurate analytics to make solid decisions.

Please join us for this webcast sponsored by Seven Lakes Technologies and Noah Consulting.


Operating a Sustainable Oil & Gas Supply Chain in North America

When Tue, Oct 20, 2015

Short lead times and unpredictable conditions in the Oil & Gas industry can create costly challenges in supply chains. By implementing a LEAN culture of continuous improvement you can eliminate waste, increase productivity and gain end-to-end visibility leading to a sustainable and well-oiled supply chain.

Please join us for this webcast sponsored by Ryder System, Inc.


On Demand

Leveraging technology to improve safety & reliability

Tue, Sep 22, 2015

Attend this informative webinar to learn more about how to leverage technology to meet the new OSHA standards and protect your employees from the hazards of arc flash explosions.


The Resilient Oilfield in the Internet of Things World

Tue, Sep 22, 2015

As we hear about the hype surrounding the Internet of Things, the oil and gas industry is questioning what is different than what is already being done. What is new?  Using sensors and connecting devices is nothing new to our mode of business and in many ways the industry exemplifies many principles of an industrial internet of things. How does the Internet of Things impact the oil and gas industry?

Prolific instrumentation and automation digitized the industry and has changed the approach to business models calling for a systems led approach.  Resilient Systems have the ability to adapt to changing circumstances while maintaining their central purpose.  A resilient system, such as Maximo, allows an asset intensive organization to leverage connected devices by merging real-time asset information with other critical asset information and using that information to create a more agile organization.  

Join this webcast, sponsored by IBM, to learn how about Internet of Things capabilities and resilient systems are impacting the landscape of the oil and gas industry.


Emerson Micro Motion Videos

Careers at TOTAL

Careers at TOTAL - Videos

More than 600 job openings are now online, watch videos and learn more!


Click Here to Watch

Other Oil & Gas Industry Jobs

Search More Job Listings >>
Stay Connected