Weatherford PetroLog 10.7.1.6

Weatherford PetroLog 10.7.1.6

Petrolog is a specialised Log Data Management, Petrophysical and Imagelog Analysis software platform that performs many of the tasks associated with the management and evaluation of well log data. Petrolog is at the forefront of the industry by keeping abreast of new technology and the development of new advanced interpretation models.

Petrolog has been developed with the close interaction of its many users and their feedback. Crocker Data Processing welcomes any comments which will contribute to the future development of Petrolog to make it more powerful and intuitive for its users.

History

The original version of Petrolog was first released for the oil industry on mainframe (VAX, PRIME) in 1982. Since then it has been ported to all popular operating systems (UNIX, Linux, DOS, Windows 95/98/2000/XP). In 2006, the software was ported to the Microsoft Windows .NET framework using the latest C# language. All features and processing methods in the original Petrolog software have been ported.

For new users and users migrating from the old Petrolog software, a set of Tutorials have been created to give an overview of a complete well processing workflow. This is in addition to a detailed set of context sensitive help files (accessed via the F1 key).

For example, a detailed overview of the CPX Petrophysical Analysis technique (CPX Analysis: Step-by-step overview) is available to guide the user through the sequence of steps required to take to obtain a full petrophysical well analysis.

Software Module Overview

Basic Module

This module is required for the basic Petrolog functionality and to support any additional modules. It includes the following items:

• Import/Export Data: Petrolog can import and export data from several industry standards including LIS, LAS/LBS 2.0, LAS 3.0, ASCII and SEG-Y into our proprietary binary format file. This module also has an extensive set of tools for verification and reading from a variety of legacy tape media and formats (including 9-track, DAT and exabyte tape media).

• Petrolog Desktop: The Petrolog Desktop contains the various controls to create and manage a field or well based project including the Explorer, Log Listing, Workflow Explorer, Preferences and Calculator.

• Petrolog Mapview: Mapping QC tool including well paths, contouring, bubble maps and interactive well selection

• Discrete Data Management This is a set of user definable tables to allow management of well header information, any type of non-continuous well data (e.g. directional surveys, core, DST, formation tests, etc) and Strata type data (e.g. Formation Tops).

• Continuous Log Management: This is an extensive set of tools to manage, edit and perform simple processing of continuous well log data. The log editing functions include both tabular and graphical methods of merging, editing and TVD/TST processing.

• User Algorithms: A powerful and flexible scripting language to create user defined functions and processes.

• Graphics: Includes plots for all log types, histograms, cross-plots (both 2D and 3D) and stereographic projections. All graphics can be sent to all windows supported printers and plotters and to a variety of graphical formats including EMF, PDF, JPG etc.

• Montage Editor: A graphics editor that allows users to edit and build A0 or larger presentations including saved plots, cross-plots, histograms and any other type of images in almost any graphical format.

• Data Mining: Includes a variety of data analysis and reporting tools.

• Petrolog Tools: A set of tools including a fully featured “petrophysics” calculator, utilities to convert existing Petrolog V9 data and plot formats to V10, graphics conversion utilities and the Petrolog evaluation request utility.

Log Analysis

This module provides an extensive variety of Petrophysical Log Analysis functionality including the following items:

• “Quicklook” Analysis: A set of User Algorithms to enable a user to manually perform a basic “step-by-step” log analysis to generate Vclay, Porosity and Water Saturation in sequence.

• CPX” Integrated Log Analysis: A fully integrated crossplot based analysis system utilising either the Complex Lithology, Sand-Silt-Shale (SSS) or Two Water (TWA) models. This technique has been developed and refined by CDP over the last 20 years and is being used successfully for a huge range of clastic and carbonate environments from all over the world. The CPX integrated analysis includes the following features and output logs:

• • Environmental Corrections for all standard logging tools from the major Wireline & LWD Service Companies (Schlumberger, Halliburton, BHI, Weatherford/Precision/Reeves, Tucker, Probe). The log analysis processing will handle any mixture of different logging tools in the same well.

  • Vclay determinations from 9 clay indicators, with non-linear transforms and various final Vclay indicator selection options.

  • Ability to use any combination of external logs (Vclay, PHIT, PHIE) and input parameters (a, m, n, Rw etc)

  • Gas and shale corrected Effective and Total Porosity automatically generated from best available porosity logs.

  • Wide range of Saturation Equations based on both SWE (Indonesia, etc) and SWT (Waxman-Smits, etc) methodologies.

  • Dual clay resistivity model and glauconite options available with all models.

  • Lithology and permeability determination available using various techniques.

  • Uncertainty estimation of the key petrophysical results.

  • Generation of a recomputed DTC, DTS and RHOB based on the results of the log analysis. Either the original logs or these results are used to compute and detailed set of Rock Mechanics and Rock Strength logs.

  • Additional processing available for various auxiliary logging tools and techniques including NMR, EPT and CBM (Coal Bed Methane) using the results of the CPX Integrated Analysis.

• “CPX” Multi-well Processing: Unlimited number of wells can be processed utilising strata selections and a single well reference CPX analysis.

• Hydrocarbon Volume Reporting: Includes full single & multiwell lumping, P10/P50/P90 petrophysical and cutoff uncertainty statistics,cutoff sensitivity module.

• Neural Network Analysis: Use of a Self Organising Map technique to estimate missing logs, permeabilities or facies based on a representative training data set.

DLIS

• The Import/Export DLIS module is required to Import or Export DLIS log data.

Multimin

• A Multimin Probabilistic Analysis module to complement the existing “CPX” and “Quicklook” deterministic approaches. This will allow the user to fully define and utilise any mineral, mineral property, constraint and crossplot to determine your minerals and lithology volumes probabilistically.
• An initial release is available in the Petrolog 10.5 which includes fully user definable minerals, properties, crossplots and a fully interactive crossplot based interface (similar to the CPX functionality). Further updates to the available constraints and processing options will progressively be introduced during 10.5 software upgrades.

Digitise

• The Board Digitisation module allows digitisation of logs directly from film or prints using a digitising board.

Cased Hole Analysis

• The Cased Hole Analysis (or “Prodlog”) module is used to process Sigma and Carbon-Oxygen logs in conjunction with the Open Hole logs to determine changes in saturation over time.

Geophysics

• The Synthetic Seismogram module includes the capability to read/write SEG-Y files, perform check shot corrections and compute synthetic seismograms using user defined wavelet convolution.

Cross-Sections

• The Cross Section module is used to generate interactive 2D multi-well cross sections. The 10.5 release includes full directional/horizontal well paths, user defined well plot templates, interwell and interactive surfaces, faults, etc.

Imagelog

• The Imagelog Analysis module supports a wide range of Dipmeter and Imaging tools (FMS, FMI, EMI, HMI, STAR, Sonic images, BHTV, 3, 4 or 6 arm dipmeter tools, RAB, ADN tools, Core photos, etc.). This module includes the following features:
• • Imagelog graphics including Tadpoles/Sinusoids, Stereonets, Stick Plots, Azimuth Roses and Breakout Plots
  • Imagelog processing including accelerometer, Emex, speed corrections, button and pad depth shifts, arm swing, tool tilt, etc.
  • Advanced Dip Editor and Autodip Processing
  • Fracture Frequency and Width Analysis
  • Advanced Stereonets

Image Petrophysics

• The Image Petrophysics module includes the computation of Azimuthal RT, Vclay, Porosity, Grain Size Sorting and Permeability distributions from Images. Includes graphical zoning, multi-linear and Sw resistivity compensation.

Sonic Waveform

• A Sonic Waveform Analysis module to interactively pre-process and determine Compressional, Shear (monopole & dipole) and Stonely DT’s for all available Wireline and LWD digital sonic tools. Includes a zone based control file, AGC, frequency filtering and flexural dispersion corrections
• Further post coherence processing functionality (including Shear Anisotropy and Stonely Permeability) will be incrementally added for the Petrolog 10.6 release in April 2008.

Petrolog Roadmap

Following the Petrolog 10.0 commercial release in June 2006, an extensive array of enhancements and new features have being implemented for Petrolog, with further details available in the Release Notes. The ongoing release schedule is progressing as follows:

Petrolog 10.5 (March 2008)

Petrolog 10.5 includes an extensive array of improved functionality for many of the current modules.

• Environment: Improved the preferred units system, hybrid units (e.g. Canadian) now applies to all graphics and CPX functionality.
• Import/Export: Merged the LAS, ASCII and Petrolog V9 Import and Export functionality into a single dialog, with extensive workflow efficiency enhancements and options added.
• Petrolog Explorer: Added a well filter using file name, wellheader field and log availability search criteria.
• Continuous Data: Logdata file read/write access upgraded to allow only one write process to access the logdata file
• Continuous Data: Majority of dialogs & processing now “modeless” allowing continued interactivity during processing.
• Plots: Can now display any log from multiple files/wells on same plot, plus many other enhancements including “scroll locking” between plots.
• Plots: Improved stability printing very large graphics file outputs to EMF and XPS formats and downscaling of graphics images to display/print resolutions.
• Histograms: Can be used to generate Normalised Log outputs and statistics reports from data/intervals displayed on Histogram.
• Crossplots: Extensive improvements including improved multiwell display, ghost background mode and additional display options.
• Petrophysics: Multiwell CPX crossplots now fully operational, with intuitive formation selection logic when changing between wells.
• Petrophysics: Extensive updates to the Hydrocarbon Volume Reporting module including a new cutoff sensitivity analysis module.
• Cross-Section: New module with full directional well paths and fully interactive objects (wells, strata, faults, etc).
• Mapview: Now displays well directional paths, plus many additional display options.
• Digital Sonic Processing: Added AGC corrections, Flexural Dispersion and Sonic Anisotrophy processing to module, plus additional tool definitions.
• Datalogger: Added auto-remarks plus additional depth encoder support to the FET datalogger software.

Petrolog 10.6 (July 2008)

Petrolog 10.6 will include a progressive revamping of the Petrolog data models to add features including full group functionality for continuous logs and a central “control panel” for to handle all well/depth interval/strata/log/unit selection. It will also include the full implementation of various processing modules that are still in final development (Digital Sonic Processing, Multimin, Carbon/Oxygen Processing, Cross-Section, etc).

• Petrolog Control Panel: Upgrade of the various control panel components (Explorer, Strata and Log Listing displays) to eventually all the management of all well, strata, log and unit interactions for all of the Petrolog application modules. The following changes will incrementally implemented:
• • Continuous Logs: Add Group (i.e. Set) functionality, improvements to logheader and statistics management.
  • Discrete Data: Logical merge with continuous data (e.g. display in Log Listing, drag and drop, unit management, etc)
  • Well Strata: Shift Strata functionality (default and well) into Discrete Data to improve ease of use and flexibility.
  • Units: Control panel will automatically handle all unit conversions as logs are passed/received to/from applications.
• Import/Export: Merge all Import/Export modules into a single interface, with all options available for every file format.
• Process Management: Add a process monitor to support native multithreading, process queueing and status display for all Petrolog applications.
• Petrophysics: Continuing improvements to CPX functionality including triaxial resistivity, additional NMR processing, etc.
• Cased Hole Analysis: Full implementation and CPX integration of Carbon-Oxygen Processing (RST, PGST) functionality.
• Multimin Processing: Full implementation including improved constraints, petrophysics integration and processing reporting.
• Cross-Section & Mapview: Further enhancements including background graphics and GIS map interactivity.

Petrolog V11 (Q4 2008)

Petrolog 11.0 will see a system wide upgrade of all of the Petrolog functionality as follows:

• Petrolog Control Panel: Full implementation of the Petrolog Control Panel, and upgrade of every Petrolog application to access all required processing input/output well, intervals, logs and units via the control panel. Every application will natively support single and multiwell processing.

• Help Files: These will be fully updated as each application is standardised to utilised the Control Panel.

• Environment: Full project based networked multi-user and security functionality via the Control Panel.

• Environment: Full multithreading of all processes, with a process management console available.

• Environment: Full Petrolog Library Access via development SDK. Will allow external developers to build applications utilising the Petrolog libraries (data management, graphics, etc).

• Discrete Data: Full implementation of WITSML 1.3.1 Well Header, Discrete Well Data and Units standards.

• 3D Graphics: Update to .NET 3.0, which includes native interactive 3D graphics and graphic hardware access.

• User Algorithms:  Major upgrade to User Algorithm functionality including access to the Petrolog library routines.

• Formation Test Module: Fully Interactive Formation Pressure Gradient Analysis module.

Petrolog V12+ (proposed future module development based on client demand)

• Graphical Workflow Manager: Flowchart style tool to build a process flow using User Algorithms with full access to all Petrolog libraries

• WITSML client: Real time data acquisition client module.

• Inter-operability Modules: As required for Openspirit, Petrel, Openworks, etc

• Crossplots: Module to create multiple input multivariate crossplot analysis.

• Borehole Geomechanics: Mechanical Earth Modelling, Shear Anisotropy and Permeability, Stress & Breakout Analysis module
• Core Evaluation: Advanced Core Analysis processing

• Borehole Geophysics: Advanced Synthetics, Fluid Substitutions, VSP, Seismic Modelling (AVO, etc)

• Monte-Carlo Uncertainty: Full Monte-Carlo Uncertainty processing.
• Electrofacies Processing: Advanced crossplot cluster based Electrofacies identification.