Bulwark Services
Limited has technical expertise in the digitization of all kinds of
wireline formation evaluation logs (such as GR, resistivity, sonic,
density, neutron, spectral GR, and SP logs e.t.c.), dipmeter logs (such
HDT and tadpoles) and interpreted lithology logs.
We have an
efficient tool which has an automated tracking algorithm with manual
digitizing option when required. Digitized logs quality control is
achieved by overlaying the digital data against the scanned log images of
the paper logs, and thereafter, editing and composting of log curves and
repair of existing data may be performed.
Digital
data can be output to any industry-standard format for use in virtually
all available log analysis, data management and exploration systems, such
as LAS, LIS, DLIS, AutoCARD DXF, GeoQuest/IESX Card Image format,
Landmark, OpenWorks and Tabbed.
Map
Digitization
Bulwark Services
Limited
has executed a number of map digitization projects for the Nigerian E & P
majors. The work involved digitization of contours, faults, horizons, well
locations and shot points on structural geological maps, digitization of
different layers of facies from seismic facies maps, digitization of X-Y
or navigation data from base maps and digitization of topographic, base
and coverage maps.
Printed maps are
scanned to give high-resolution colour, greyscale or black & white TIFF
images. Apart from being the starting point for the vectorizing process,
these images can be stored and shared across a network like a digital
atlas. Conversion of features on a map to digital format is done
on-screen, at a range of zoom levels, with the mouse positioned on the
scanned image. On-screen digitizing allows maximum accuracy in terms of
point for point data extraction. An immediate visual overlay of the
digitized data gives the operator a simple but highly efficient QC of
output data quality. Flexible projection and spheroid definition along
with three different gridding methods allow the user to define an accurate
baseline for data capture. Auto digitizing, as well as manual options,
give a fast and reliable means through which all types of map data may be
captured.
Contours, simple
faults, fault polygons and seismic facies can be captured and output in
standard formats, as well as shot point, cultural data, block boundary
and well head data. Co-ordinate systems may be modified on output from the
digitizing software and digitized data may be redisplayed as colour plots
at a range of scales. Where desired, output formats may be tailored to
specific client standards. Once digitized, data from different sources can
be integrated to create a rationalized geodetic information bundle.
Digitizing Interpretation
Interpreted seismic faults and horizons
can be captured in much the same way as the maps are digitized. Colour,
greyscale or black and white scans of the interpreted seismic data are
digitized on-screen. A grid representing temporal and spatial changes on
the seismic section is created and verified prior to data capture. An
option of auto tracking a colour keyed horizon is available and multiple
faults and horizons can be captured on each line. The output data are
related to line name, horizon name, etc. and can be merged with navigation
data where available.
