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Key Technical Features of PanSystem® Software

PanSystem software’s graphical interface offers the user an efficient workflow. Its versatile data processing and analysis capabilities meet the challenges presented by the high performance of modern pressure gauges and the large volumes of data which they can acquire.

Versatile data preparation

  • Easy entry of basic rock and fluid parameters
  • Import of raw data
    • ODBC databases supported (Weatherford RMS, any standard SQL)
    • Import from file or Microsoft® Excel® spreadsheet
    • Import from LAS or DPK files (wireline formation tester)
    • More than adequate capacity (20 million data points)
    • Append new data to existing data, including quasi-real-time acquisition through the ODBC facility
  • Data processing
    • Wavelet transform filter for outlier removal, denoising, reduction, and event detection
    • Large choice of alternative data reduction and smoothing algorithms
    • Data manipulation (function, difference, shift, copy, paste, merge, resample, and tidal filter)
  • Flow rates
    • Manual and automatic identification of rate change events (with a choice of simplistic and wavelet-based options)
    • Flow rate averaging from long-term production records
    • Wavelet filter reduces size of rate data channel while honoring cumulative production
    • Option to compute sandface flow rate from dp/dt
  • Wellhead-to-bottomhole flowing pressure conversion using VFP format flowing pressure files, Weatherford’s WellFlo® application, or a simplified dry gas model

Analysis

PanSystem software provides many complementary tools for well test interpretation. This figure shows a gas well buildup test with flow regime markers, straight line derivative diagnostics, and a simulated analytical model response whose parameters are displayed in the box at left.
PanSystem software provides many complementary tools for well test interpretation. This figure shows a gas well buildup test with flow regime markers, straight line derivative diagnostics, and a simulated analytical model response whose parameters are displayed in the box at left.

  • Wide range of wellbore, reservoir, and boundary models
  • User-defined models can be easily integrated via dynamic link library
  • Up to six different models can be investigated in a single file
  • Diagnostic plots include log-log with selection of pressure derivatives, rate normalization and superposition/convolution, line-fitting, and type-curve matching
  • Deconvolution module extracts underlying reservoir and boundary models from a multi-rate test sequence including flowing periods and shut-ins, without any prior assumptions regarding models and has the option to minimize errors in flow rate measurements
  • Quick single-well simulation allows rapid validation of selected storage, reservoir and boundary models, and parameters
  • Auto-regression for automatic parameter optimization
  • PDA facility for the analysis of long-term flowing pressure and rate (or cumulative) data to estimate hydrocarbons in place using:
    • Agarwal-Gardner type-curves
    • Weatherford’s equivalent constant rate (ECR) deconvolution method

Simulation

  • In addition to the quick simulation for model validation, PanSystem software contains multi-well, multi-layer simulators to generate pressure from flow rate (advanced simulation) and, less conventionally, flow rate from pressure (the PanFlow™ module). In layered reservoirs, layer offtake and crossflow are modeled. PanMesh™ software, PanSystem’s companion numerical well test simulator, gives the user access to more complex well and reservoir configurations which are beyond the capabilities of analytical models.

Deliverability and Production Forecasting

  • Using the results of transient well test analysis or from direct measurements of flowing pressures and rates
    • Conventional IPR for oil or water
    • Empirical C-and-n and rigorous LIT methods for gas and condensate wells
  • Production forecasting module forward simulates the production profile through transient, semi-transient, semi-steady, or steady state phases to abandonment
    • Constant bhfp option or constant thfp (using a VFP format file for tubing performance)
    • Reservoir pressure is computed versus time in depletion cases

Test Design

  • Well test design module includes testing time and flow rate advisors
  • Predicted pressure response generated by advanced simulation can include gauge resolution, noise, and drift

Comparison of buildup tests run in the same well in 2007 and 2009 using PanManager software.
Comparison of buildup tests run in the same well in 2007 and 2009 using PanManager software.

PanManager™ Software

  • Opens multiple PanSystem files for comparison of gauge data sets and interpretations
  • Well tests run in same well at different times
  • Well tests run in different wells
  • Different interpretations of one well test

Reporting

  • User-configurable report format can be stored as a template
  • Output to printer or to Microsoft Word
  • Version 4 of the regulatory Pressure ASCII Standard (PAS) format of the Alberta EUB is supported for TRG.PAS

PanScan™ Software

  • Utility to digitize scans of mechanical gauge records (strip charts) ready for import into PanSystem software

The PanWizard module guides the user step-bystep through the analysis workflow.
The PanWizard module guides the user step by step through the analysis workflow.

Help

  • Interactive PanWizard™ module guides the new or infrequent user through the workflow
  • Detailed help documentation for technical and functional issues
  • Support desk offers technical advice by e-mail or phone
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