PressurePlot application and PressureDB coverage as at August 2007

PressurePlot application and PressureDB coverage as at August 2007.

PressureDB™: pressure database and PressurePlot™ software

PressurePlot™ is software developed to analyse data in PressureDB™, a collection of subsurface formation pressure, temperature, salinity and related geological data from oil and gas wells across Australia and its territorial waters.

  • 17 June 2010 | Updated 14 October 2011

Background

Historical well data represents a considerable asset for any hydrocarbon company, but is often poorly archived and in non-digital format.

Converting this data to a usable format is time consuming and expensive.

In addition, the relative quality of the data is unknown, potentially introducing large errors to the interpretation.

As part of its research CSIRO has developed a quality controlled database, PressureDB™, of formation pressure, temperature, salinity, porosity, permeability and related geological data for Australian wells.

The database contains over 1473 wells and over 50 000 pressure points.

CSIRO has now released PressureDB™ and the associated viewing software, PressurePlot™, free of charge: download it at www.pressureplot.com [external link].

PressureDB database

PressureDB™ also stores fluid and geological data required for formation pressure analysis.

Data is sourced directly from publicly available well completion reports.

PressureDB™ contains the following data for display by PressurePlot™:

  • formation pressure tests
  • formation temperature
  • formation water chemistry and resistivity
  • stratigraphy and lithology
  • mudweight
  • fluid contacts
  • porosity and permeability
  • thermal conductivity
  • geothermal flux
  • minimum stress tests.

This database represents the only formation pressure database of its kind for Australian data.

PressurePlot™ software has been developed specifically to analyse pressure data on a single well or multi-well basis.

It contains complementary data necessary for understanding the pressure regime within a particular unit or formation and a unique system, PressureQC™, for ranking and comparing pressure data.

In July 2009, PressureDB™ included data for 1473 wells totalling over 63 604 pressure, 994 stress, 35 116 temperature, 3660 salinity, 23 763 porosity and 14 649 permeability values.

PressureDB™  is an active CSIRO resource and the online database will be periodically updated.

PressureQC™

CSIRO developed PressureQC™ to provide a fast, systematic and objective way of comparing large sets of historic and contemporary downhole pressure measurements in a meaningful way.

PressureQC™ assesses the quality and quantity of formation pressure data available in the well completion report, and assigns a code which reflects the degree of confidence associated with that measurement.

These codes are stored in PressureDB™ and are displayed in PressurePlot™ as a reliability code, ranked from 1-Most Reliable to 5-Very Low Reliability.

PressureQC™ also has systems for assessing temperature and salinity data, displayed as a selectable option in PressurePlot™.

For more information about PressureQC™ please contact CSIRO directly.

Read more about PressureQC™ system for hydrodynamic data quality control.

PressurePlot™ application

PressurePlot™ interrogates PressureDB™ database via a set of user selected options.

It then plots the data as a vertical profile with depth.

For single or multiple wells, PressurePlot™ displays data for any or all of:

  • pressure
  • temperature
  • salinity.

The gradient analysis function is used to identify pools and contacts.

For single wells, data is plotted against stratigraphy and lithology for immediate assignation to a specific unit.

Extra features of PressurePlot™

PressurePlot™ includes a number of user defined plot options, including:

  • single and multi-well display
  • single and multiple data type analysis
  • analysis by specific stratigraphic unit
  • hydrostatic and lithostatic gradients
  • pressure and temperature gradients
  • porosity and permeability gradients
  • zoom, unit conversion and datum selection
  • data and image export.

PressurePlot™ is already being used by major oil companies and international research institutes.

PressureQC™ provides a fast, systematic and objective way of comparing large sets of historic and contemporary downhole pressure measurements in a meaningful way.

Applications of PressureDB™ and PressurePlot™

Relating the in-situ pressure regime of old and new wells is fundamental to discovering, defining and producing hydrocarbon resources.

This system provides immediate access to the data from a large number of wells in a context that allows meaningful comparison of old and new data.

PressurePlot™, PressureQC™ and PressureDB™  can be applied to most 2D interpretation which requires an understanding of subsurface conditions involving pressure, temperature and/or salinity on both field and basin scales, including:

  • pressure, geothermal and permeability gradients
  • fluid contacts, including tilted contacts
  • geothermal properties
  • compartmentalisation
  • overpressure
  • production decline
  • vertical and lateral connectivity
  • fluid type and density
  • reserves estimates
  • capillarity
  • fluid migration systems
  • seal integrity
  • reservoir geometry.

Accessing PressureDB™ and PressurePlot™

PressurePlot™ and PressureDB™ is available free at www.pressureplot.com [external link].

Read more in the PressurePlot™ brochure.

  • PressurePlot™, PressueDB™ and PressureQC™ are trade marks of CSIRO Australia.