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SPWLA 2007 LWD azimuthal density logging
Finding Yourself in Deep Water (Part 1)
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Technical Articles
The articles below have been writen and contributed to by a number of sources including Task Geoscience team members and people throughout the geoscience industry. We would like to thank all the writers who contributed and all the companies and organisation that provided data.
SPWLA 2007 LWD azimuthal density logging
A logging while drilling (LWD) Azimuthal LithoDensity (ALD) imaging tool was run in horizontal dual lateral wells 110/15-L13 and 110/15-L13z with the aim of identifying fault and fracture intersections. The wells are located in the BHPBilliton operated Lennox Field, in the Liverpool Bay area of the East Irish Sea Basin, United Kingdom Continental Shelf (UKCS).
Get to know your faults
In the last decade, 3-D seismic techniques have completely revolutionised the structural and stratigraphic modelling of reservoirs and have led to a remarkable resurgence, world-wide, in the discovery of new fields. Some fields previously interpreted as lacking any significant structural control have for the first time been shown by 3-D surveys to contain important fault and fracture trends, such as the super-giant Ghawar Field of Saudi Arabia. However, most faulting within reservoirs occurs at a sub-seismic scale and the complexities of fault zones are often not considered. The details of these faults and fractures are best revealed by a combination of borehole images and cores.
This article discusses the occurrence of fault damage zones in which cataclastic fracturing has a profound influence upon reservoir properties. Examples are given of modern techniques of borehole imaging and core analysis to characterise the importance of such fracture systems.
Finding Yourself in Deep Water (Part 1)
Spectacular successes in deep water drilling have led to a new era in exploration within turbiditic systems around continental margins.
Finding Yourself in Deep Water (Part 2)
Part I of this article reviewed the types of borehole image tools and the styles of geological features which can be resolved in deepwater sediments. The general approach to interpretation was outlined and considered in the context of the major depositional environments which can be found in a deep marine setting.
Go With The Flow (Part 1)
Palaeotransport analysis is a valuable sedimentological tool in reservoir and basin characterisation. Such interpretations can be derived using borehole images. This document provides an introduction to palaeotransport analysis from borehole images and dipmeter data. It details the applications, methodology and pitfalls associated with such an analysis. This will enable the reader to help plan image tool campaigns, comprehend technical approaches and enable them to get the most from an interpretation report.
360° core imaging - measuring the detail
This short poster demonstrates the uses of digitally acquired 360° core images to augment and calibrate borehole image data.