Services

Well Log Digitization

  1. We have the geo-technical expertise to convert all hardcopy and analog images of well log to industry standard interpretation ready electronic vector format.
  2. We accept any standard color, GRAYS-CALES, B&W, TIFF, JPEG, PDF, BMP for conversion, even warped and stretched images are digitized.
  3. Qualified Log Analysts & Expertise deliver the digital data in standard LIS, LAS(1.2 and 2.0 version), BIT, DLIS, ASCII, Tabbed Delimited ASCII, PETRA ASCII Well data, Auto Cad DXF, GCS, DXF File, LAS no Null, Plot Def. File, RIS View Plot & LBS formats after verifying accuracy of all data.
  4. Using these Generation Parameters, curves are traced- Standard interpolation Gap (ft)-2.0 & Standard interpolation Gap (meter)-15 are taken.
  5. Null Gap Value- -9999 in (meter and ft)
    Depth Grid Tolerance (%) 25.0 in (meter and ft).
    Sampling Rate is usually taken (.5) for ft jobs and (.1525) for meter jobs.
    (All the parameters can be changed as per requirements).
  6. At R. S. Data, all Western (Schlumberger, Halliburton, Dresser Atlas, RAIS etc.) Ancient and Russian Log are digitized.
  7. All kind of wells are taken with offshore, onshore and work station ready specifications (WSR).

WIRELINE LOG:

MUD LOG:

NON STANDARD LOG:

Sample list of Well Log Scales:

A few curves and their standard units:-

Curves Standard Units
... Feet Meter
GR,CGR,GRD GAPI GAPI
CAL,HCAL,CALX IN MM
ID,FR,LLS,LLD,MFR OHMM OHMM
TENS LBS ...
NEUT V/V V/V
NEUT. POROSITY DEC V/V
DENS. POROSITY DEC V/V
SPHI DEC,US/F V/V
RHOB G/C3 K/M3
DEN G/C3 K/M3
DRHO G/C3 K/M3
SP MV MV
DT,DTCO,DTSM US/F US/M
H-GAS, KG KPPM
ROP FT/H(feet/hour) MIN/M
PEF V/V B/E
T-GAS KG TC/CC
COND/CILD MMHO MMHO

Digitizing Process:

R. S. Datum replaces a digitizer tablet. Sometimes it is necessary to extract data values from graphs, e.g. in most scientific publications only plots but no data values are published. Digitization makes it easy to actually get back numbers from such a plot, this is a step-by-step process wherein first of all analog images are imported and saved with the suitable extensions. Thereafter by using the latest internationally preferred digitizing systems, it is scaled and defined under the required axes, then digitized and out put is received in ASCII format that is LIS, LAS with different versions.

  1. Under the conversion from analog to digital, all specified curves are digitized – automatically and manually by setting requisite Generation Parameters.
  2. Input-Output: All standard scales (imperial/metric) are accepted in input files-1”, 2”, 2.5”, 5”, 6”, meter. 10” scales is taken on customers demand. Images in different colors and extensions e.g. TIFF, B/W, JPEG, BMP, are accepted and Output is delivered in LAS (2.0, 1.2 versions-CWLS LOG ASCII STANDARD - VERSION 2.000000) LIS (Obsolete now) ASCII, PETRA ASCII, LBS etc. formats
  3. Multiple back-ups including, Linear, Hybrid, LINX, Logarithmic and Reciprocal scales can be used. Neuralog tracing tool works on unlimited back-up scales, automatically patching together the different sections of curve for streamlined curve output.
  4. All wire line and non standard log- Micro, Litho logs, Dipmeter and Gas logs are included.
  5. Accuracy checking function shows the percentage of accuracy for each curve separately.

Tracing of Curves:

  1. Interactive Curve Editing with immediate resume tracing.
  2. Highlighting of traced curve for immediate feedback.
  3. Solid and dashed curve tracers to account for curve crossings.
  4. Built in grid model to account for curves crossing the grid.

Appended and Spliced LAS files:

Warped & Stretched Image:

Quality Control:

Digital Log Editing:

  1. System helps to compare the actual analog image with delivered digitalized file. It displays the log image and traced curves directly on your computer, providing immediate feedback—Point and Click interaction with the tracing tool.
  2. Error correction at any point in the tracing process.
  3. Customized LAS Curve Template
  4. Custom Back-up Scales for Amplified and Multi-Wrap Scales.
  5. LAS Curve Editing.
  6. Curve Arithmetic.
  7. Baseline Shifting.
  8. Depth Shifting.
  9. Appending LAS files.

Filling of Header:

All Log Header Information is captured under our digitizing solution.

  1. LAS Header, Generic ASCII or Excel.
  2. License No. is filled in API no. filed.
  3. LAS file is named as 16 characters UWI (e.g. 100001006048W500.LAS).
  4. In TVD- (e.g.100001006048W500.TVD.LAS).
  5. Canadian DLS Township is used in Header for Alberta Wells in well category.
  6. National Topographic is used for British Columbian (BC) Wells.
  7. Class code, Company code, Log code, Mud code etc. are filled on the customers’ instructions otherwise we use standard U.S.A. specifications.

Usually All Header Information are Captured as per Customers’ directions. (Above are just examples.)

DIPMETER (Tadpoles)

Dipmeter log were developed to resolve the “3-points define a plane” problem in a single well bore by measuring some physical property. Dipmeter and image logs have evolved from primitive beginnings to become an essential and accurate log for assessing structure and stratigraphy of reservoir rocks. Identification of fracture intensity and fracture orientation are another important use of these logs.

Types of Dipmeter:

  1. SP Dipmeter log and Photoclinometer
  2. 3-Arm Continuous Dipmeter and Photoclinometer (CMD)
  3. 4-Arm High resolution Dipmeter (HDT)
  4. Stratigraphic-High resolution Dipmeter (SHDT)

SDIP- Structural Dip (Geodip)
SDAZ-Structural Dip Azimuth (Geodip)
DDQR- Dip Dispersion Quality Rating (SHDT) Superfluous.

A few examples:

Following are usually traced at Multi-Linear scale but sometimes there are Tadpoles on Linear scale too.
P1AZ (Pad 1 Azimuth)
DEVI, HDEV (Deviation)
DAZI (Borehole Azimuth)
LDIP (Local Dipmeter)
High Quality Tadpoles (Filled-dark), Low Quality (Light-blank), One Tail, Two-Tail, Arrow.

Conversion of Old Gamma Logs
[Count per second (cps) to Density & Porosity (g/cc, kg/m3, phi-φ)]

Old style Neutron Log/ Gamma-Gamma Log or Sidewall Neutron (SNP) which recorded the Gamma ray count rates in count per second (cps). These are obsolete now and there is a need to convert them into modern Density & Porosity units (g/cc, φ) to make them useful for the petrophysicist.

We make this conversion possible by using Semi-Logarithmic approach and High porosity- Low porosity method, equations, graphs and charts.

Geographical Information System (GIS)

Our experience for more than a decade in Geographical Mapping is pushing us to become a well known and reputed service provider in this field. We endeavor to provide best quality output to companies requiring help in getting spatial information mapped and interpreted. At R S Datum, our expertise have depth of knowledge of data mapping, feature extraction or compilation, management of information and integrating enterprises through GIS expertise.

We try our best to help you obtaining the best type of Digital Imagery, whether it is Arial Photography of Satellite Imagery. Our services include Land Cover Mapping, Utility Mapping, Tax Parcel Mapping, Thematic Mapping, Topographic Mapping, Contour Mapping, Cartographic Mapping, Road Network, Topo Sheets Analysis, Mapping for street navigation system, Ortho photographs rectification, Flood insurance rate mapping, Contour Digitization for Terrain Analysis, Soil and land use for agriculture, wetlands, airport, highway and Rail Mapping.

Our GIS Mapping services help in these areas: Forestry, Water management, Telecom, Power Distribution, Gas and Oil pipeline, Agriculture, Governmental schemes for developments for different Provinces and regions etc.

Inputs which are generally accepted: Geo TIFF, JPEG2000, MrSID, netCDR,

General outputs required by our global clientele: AutoCAD DXF, Cartesian Coordinate System(XYZ), Digital Line Graph (DLG), EsriTIN, GeoMedia, ISFC, MapInfo TAB format & The most popular these days- SHAPE File, Spatial data file, Vector Product Format (VPF), World file e.g. JPEG, BMP etc., Dual Independent Map Encoding (DIME) -Ob, Well known text (WKT)

Grid formats for elevation: GTOPO30, DTED, GeoTIFF, SDTS.

Software used: AutoCAD, ERDAS Imagine, ArcGIS, MapINFO, Global Mapper.