Technology

Understanding electro-magnetic surveys

Electromagnetic surveying is one of the least well understood of the non-seismic exploration techniques. There are various acquisition choices to be made – for example it can be undertaken using…

The Next Generation Subsurface Modelling

Modelling reservoirs using a 3D grid is a common tool for both the geologist and the reservoir engineer. As models increase in structural and stratigraphic complexity the process of creating…

Providing In-depth Knowledge

Making depth conversions more reliable has become an obsession for a dedicated geophysicist. As a result the Norwegian consultancy Aker Geo now claims to have the very best tool to…

The Valhall LoFS Project

The Valhall permanent seismic array (Life of Field Seismic; LoFS) has successfully provided easy access to high quality 4D images for the purpose of improving oil recovery. This article provides…

Mid Cretaceous Source Rock Enigma

Large-scale volcanism caused by a superplume in the mantle was possibly responsible for wide-spread deposition of excellent source rocks in Mid-Cretaceous times. Organic rich source rocks buried deep in sedimentary…

The Snorre Field Pilot

In 2008 the Optowave fibre-optic seismic sensor cable was trenched at the StatoilHydro-operated Snorre field with the aim of achieving insight into installation, data acquisition and monitoring procedures. The Snorre…

Deep-Reading Technologies

Deep-reading technologies image the interwell space at higher resolution and provide a new scale of characterization that was previously not possible. In recent years, more oil and gas reserves have…

Shooting Seismic in Linked Circles

“Coil shooting” is a cost-effective technique towards better imaging over small to medium sized exploration areas. Encouraging results may lead to a rapid increase in the next 5+ years. Seismic…

Volumetric Curvature: The Next Step in Seismic Attributes

In 1828, Johann Gauss developed his theorema egregium, latin for remarkable, to deal with curvature in 3-dimensional space. Now, through the use of volumetric curvature attributes, geoscientists apply this remarkable…

A Revolution in Resolution

The need to maximise recovery has spelt success for a seismic technique which hugely increases reservoir knowledge. Z-Seis is a specialist seismic company concentrating exclusively on the acquisition and processing…

Low-frequency Seismic Noise: The Music of Oil?

Passive low-frequency seismic is an area of active research and development, and is rapidly being taken up as a new direct hydrocarbon indicator (DHI) technique for exploration. The interest in…