LogIC

LogIC is a petrophysical software for the analysis of NMR, image, sonic waveform and standard well-logging suites.

Logicom have developed LogIC software to perform in an operational setting where communicating answers, in an environment of urgency, is essential. It is developed by working geologists and petrophysicists, to meet their requirements in the real world of exploration and production. LogIC evolved with an emphasis on speed, flexibility and output quality. It is also a tool for developing and testing ideas, and communicating them effectively. This characteristic has made LogIC the perfect platform for developing NMR, image analysis and waveform sonic applications.

LogIC Features:

Input facilities

• LIS format
• DLIS (RP66) format
• LAS and BIT format
• ASCII file decoding
• On-screen digitization of well-logs, graphs, cross-plot overlays, maps, and pictures
• Core data, RFT, DST, CST and directional survey (TVD) data loading from spreadsheets, ASCII files, or keyboard

DLIS and LIS tape/diskette reading include customisable data curve selection criteria, auto-store and batch facilities. Data files may also be output in LIS or DLIS format, and transferred to tape or diskette for distribution.

Data Manipulation and Statistics:

• Listing, merging and joining of data files
• Depth shifting of logs and cores (block and stretch-and-squeeze methods)
• Many single channel functions such as interpolation, cumulation, differentiation, normalisation, standardisation, translation, matching
• Interactive algebraic manipulation of all channel data
• Filtering, by moving average, median, modal and low-pass methods
• Single channel, bivariate, multivariate and robust multivariate statistical analysis
• Clluster analysis for automatic facies identification
• Fuzzy logic for log prediction (including permeability) and facies typing.

Zonation and Analysis

Analysis is done on a zone-by zone basis. LogIC will define up to 500 zones in a single well. Each zone can be assigned different analysis parameters, providing the facility to process geologically complex sequences in one go. Each data level can be analysed by several methods in a single pass. Assigning different equations and methods offers the flexibility to compare and contrast interpretations with minimum effort. For example, LogIC is ideal for developing moving T2 cut-offs for improved Sw interpretation, and also for customising equations for better permeability predictions.

A basic philosophy of LogIC is that all the parameters, methods and plot definitions, used by the program, are stored in object oriented parameter files. This approach has a number of useful applications:

Once established, the parameter