Coal Seam Gas Development Environmental Impacts Dave Campin - PowerPoint PPT Presentation

Coal Seam Gas Development Environmental Impacts Dave Campin Queensland International Fellow Chief Technical Advisor Energy Resources and Enforcement Services Department of Environment and Heritage Protection Saturday, 11 May 13

Outline • Unconventional gas resources and CSG • Resource management in Queensland and elsewhere • Environmental authorities • Environmental impacts • Hydraulic fracturing • Other issues Saturday, 11 May 13

Unconventional gas resources and CSG Saturday, 11 May 13

World Energy Consumption (Quadrillion Btu) Saturday, 11 May 13

Hydrocarbon resource triangle Increasin g 1,000 md technolog Small volumes High y easy to qualit develop Decreasing y Increasin permeability g cost 10 md Medium Increasing need quality for hydraulic fracturing Low perm Tight gas 0.1 md oil, shale hydrates Low quality Large volumes Coal seam di ffj cult to gas develop Oil shale 0.001 hydrates md Gas Shale gas hydrates DC 12/11 Saturday, 11 May 13

US Coal Seam Gas Basins Saturday, 11 May 13

Australia Conventional Gas and CSG Saturday, 11 May 13

Petroleum Tenures Saturday, 11 May 13

Resource management in Queensland Saturday, 11 May 13

Queensland Legislation and functions • Petroleum and Gas • Environmental Protection (Production and Safety) Act Act – Department of Mines – Department of and Energy Environment and Heritage Protection – Tenure – Environmental – Process safety protection – Front line management – Audit/compliance Tenure Environmental authority Saturday, 11 May 13

CSG regulation in the US (Wyoming) • Oil and Gas Conservation Commission • State Engineers Office • Department of Environmental Quality • Bureau of Mines and Geology • Environmental Protection Agency (Fed) • Bureau of Land Management (Fed) Saturday, 11 May 13

Environmental authorities Saturday, 11 May 13

Environmental Authority Model Conditions • General conditions • Well construction, maintenance and • Water stimulation activities • Groundwater • Community issues • Regulated structures • Notification • Land • Sewage treatment • Disturbance to land • Release to water of good • Environmental nuisance quality CSG water • Air • Disturbance to land with • Waste biodiversity values • Rehabilitation Saturday, 11 May 13

Environmental impacts Saturday, 11 May 13

Seismic line Saturday, 11 May 13

Light weight vertical drill rig Saturday, 11 May 13

CSG well, power supply and water Saturday, 11 May 13

Pennsylvania countryside •Shale gas wells Saturday, 11 May 13

Instant tank Saturday, 11 May 13

Aggregation dam Saturday, 11 May 13

Severe erosion to dam wall Saturday, 11 May 13

Pivot irrigation, Wyoming Saturday, 11 May 13

Pipeline and cattle crossing Saturday, 11 May 13

Condamine River crossing Saturday, 11 May 13

Compressor station Saturday, 11 May 13

Compressor station Saturday, 11 May 13

Main line compressor Saturday, 11 May 13

Well integrity problem Saturday, 11 May 13

Surat Basin Hydrogeological Model Saturday, 11 May 13

Cumulative Management Area Saturday, 11 May 13

Hydraulic fracturing Saturday, 11 May 13

Saturday, 11 May 13

Saturday, 11 May 13

Typical frac spread for shale Saturday, 11 May 13

Frac Fluid Make-up Saturday, 11 May 13

Hydraulic fracturing risk • Detailed understanding of the local stratigraphy including aquifers, faults, linear features, hydraulic conductivity, porosity, seismic risk and groundwater dependent assets • Installation of a multi-barrier casing string isolating hydrocarbon bearing formations from water resource aquifers and currently demonstrating internal and external mechanical integrity • Requiring the presence of vertically Saturday, 11 May 13

Hydraulic fracturing risk mitigation: 2 Ensuring injected fluids have low human • toxicity, eco-toxicity and contain no persistent, bio-accumulating constituents Applying advanced process control • incorporating real-time analysis, fracture modelling and formation understanding utilising techniques such as microseismic measurements Detailed engineering understanding of the • impacts of production drawdown on connectivity to aquifers above and below the fractured zone subsequent to the hydraulic fracturing activity To initiate and maintain a high level of e fg ective • Saturday, 11 May 13

Barnett Shale gas wells, Texas Saturday, 11 May 13

Other issues Saturday, 11 May 13

Land access issues Saturday, 11 May 13

Issues • Strategic Cropping Land • Health issues • Competing tenures • Salt • International Network for Environmental Compliance and Enforcement Saturday, 11 May 13

Saturday, 11 May 13