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Tight Gas

Tight Gas – how are we progressing?

The East of England Energy Group (EEEGR) SNS Rejuvenation Special Interest Group, in association with the Oil and Gas Authority, held a Tight Gas Hackathon on 31st May 2017 at Dunston Hall, Norwich. The aim of this session was to flush out ideas from industry experts as to how the Tight Gas reserves in the SNS could be accessed, in terms of the reservoirs, stimulation, production, technology and logistics.

Following the hackathon event, the Tight Gas workgroup, which includes key stakeholders and operators from the SNS, have developed visions for five topics which encapsulate the issues and ideas generated on the day.

The workgroup will pursue JIP’s for the following three topics.

  • TQ Frac Factor:  Predict the production performance of fracced wells from the well’s reservoir characteristics.  Build on reservoir data and fracced well performance. Create correlations specific for the North Sea basin reservoirs.
  • Reservoir Properties Research:  Increase our ability to accurately characterise their reservoir properties (porosity, permeability, gas saturation, etc.) so that we can predict their flow potential. Understand the stress field (orientation and magnitude of the stresses) and geomechanical properties, which are needed as input data for new 3D fraccing models that will be used to optimize drilling and completion strategies.
  • Fraccing Models: Develop an industry wide, effective, fraccing model that can accurately predict the post-frac well performance in Rotleigend and Carboniferous reservoirs.  The model can be used in the design phase and real-time updated during the fraccing operations phase.

The group is currently awaiting a ‘call for ideas’ from the Oil and Gas Technology Centre (OGTC) where we hope that accessing Tight Gas will feature as a topic, such as the 2 topics below:

  • Frac Existing Wells:  Develop cost effective equipment, technology or methodologies to re-enter and preferentially re-stimulate selected zones in previously (multi-) fracced wells, or in wells that have never been fracced, to improve production performance.
  • Alternative Techniques to Stimulate the Reservoir: Develop cost effective, robust and reliable alternatives to aid industry in unlocking the significant volumes of gas remaining in SNS tight gas reservoirs.

Useful Tight Gas Documents:

OGA SNS Tight Gas Strategy Document

EEEGR/OGA SNS Tight Gas Hackathon Report

OGA SNS Tight Gas Stimulation – Dec 2017

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