Services and Products

Task offers a wide range of services including structural and sedimentological core logging, petrographical and petrophysical interpretation and detailed analysis of borehole images. We also offer both internal and external training. You can read about each of our services in detail and make further enquiries over the internet or over the phone by selecting from our services index. You can also use this link to download our services flier (may take a few moments to load in a new window).

Data processing and quality control

The tools that provide borehole images are technically complex, many relying on the Earth’s magnetic and gravitational fields to derive orientation data integral to further analysis. The correct functioning of fundamental systems in the tools must be confirmed (or erroneous data corrected) in order to provide confidence in the overall interpretation. In many ways this initial processing and quality control of data received by Task Geoscience is the most important step in our analysis process, as it is the foundation upon which the entire interpretation is built. Thorough checks are undertaken in order to ensure the data is fit for purpose, as outlined below. In addition, the image parameters are adjusted to maximise the clarity of geological features.

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Structural analysis of borehole images

Borehole images can yield highly detailed data-sets that provide a 1D sample of feature orientations along the well trajectory. Structural analyses up-scale these data and thereby allow a geological model to be built and extended away from the wellbore. The principle elements of structural analysis are structural zonation and the derivation of representative structural tilts by zone, fracture and fault characterisation and the assessment of present-day in-situ stress. Throughout the interpretation process, we use the attitude software application developed by our sister company Task Geomodelling specifically for this purpose.

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Structural core logging

Task Geoscience provides a comprehensive structural core logging service, with full integration of data to borehole images. Core analysis provides an important ground-truthing element to any borehole interpretation, yielding information about image resolution, structural tilt, fracture fill characteristics and cross-cutting relationships. The features logged can play an important role in the degree of reservoir communication and in the relative importance of matrix versus fracture network in hydrocarbon production.

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Sedimentological analysis of borehole images

Borehole images can capture detailed sedimentological information, with the detail only limited by tool resolution, borehole coverage and data quality. Sedimentary facies of the logged formation can be interpreted in a similar way to core facies analysis. As these data are captured digitally, thickness distribution and statistical analysis are readily generated. Palaeotransport trends are determined through analysis of depositional features such as cross-bedding, after structural de-rotation. In the deep marine realm palaeoslope orientation can be determined through the analysis of sedimentary remobilisation fabrics such as slumps and slides.

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Sedimentological core logging

Task Geoscience provide a comprehensive core logging service. Core logging programmes can be adapted and designed to meet client needs and to target specific questions regarding the succession.

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Core goniometry

Task Geoscience can provide a range of core goniometry services from oriented and unoriented core, as well as from pre-scanned whole core images. Detailed structural and sedimentological information acquired from the core can be captured, digitised, correctly oriented and depth referenced. Comparisons against any available dipmeter, image log or petrophysical log data can be made.

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Petrographical and petrophysical analysis

Although very different in their approach and the scales on which they are undertaken, petrographical and petrophysical analyses complement our other analytical services by providing contextual information from scales smaller and larger to that resolvable in a borehole image or core.

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Full waveform sonic analysis

To complement our interpretation of borehole image logs we can deliver indicators of mobility and possible open fracturing by deriving these indicators from low-frequency Stoneley waveform log data.

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Hot-shot and near-real-time services

Near-real-time interpretation of LWD image data or immediate interpretation of memory data. Rapid data processing, QC and geological interpretation helps our clients to identify unexpected events (e.g. sub-seismic faults) and assists with geosteering, side-track location, etc. Services available 24/7.

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Training courses

We provide specialised training courses in borehole image and dipmeter log interpretation for geologists, petrophysicists and geophysicists. The three day training course covers image log technology and practice (wireline and LWD), QC and processing, structural interpretation, sedimentological characterisation of clastic and carbonate rocks and in-situ stress analysis.

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3D digital visualisation - Attitude

Coded specifically for Task Geoscience through Task Geomodelling, the Attitude Viewer software application provides 2D and 3D visualisation of the borehole image data to our clients.

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