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

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

Feb 08, 2023 261 likes •694 views

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

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SLIDE 1

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

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SLIDE 2

Outline

  • Unconventional gas resources and CSG
  • Resource management in Queensland and

elsewhere

  • Environmental authorities
  • Environmental impacts
  • Hydraulic fracturing
  • Other issues

Saturday, 11 May 13

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SLIDE 3

Unconventional gas resources and CSG

Saturday, 11 May 13

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SLIDE 4

World Energy Consumption

(Quadrillion Btu) Saturday, 11 May 13

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SLIDE 5

Hydrocarbon resource triangle

High qualit y Medium quality Low quality Tight gas Coal seam gas Shale gas Gas hydrates 1,000 md 10 md 0.1 md 0.001 md Small volumes easy to develop Increasin g technolog y Increasin g cost Large volumes diffjcult to develop Decreasing permeability Increasing need for hydraulic fracturing

DC 12/11

Oil shale hydrates Low perm

  • il, shale

hydrates

Saturday, 11 May 13

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SLIDE 6

US Coal Seam Gas Basins

Saturday, 11 May 13

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SLIDE 7

Australia Conventional Gas and CSG

Saturday, 11 May 13

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SLIDE 8

Petroleum Tenures

Saturday, 11 May 13

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SLIDE 9

Resource management in Queensland

Saturday, 11 May 13

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SLIDE 10

Queensland Legislation and functions

  • Petroleum and Gas

(Production and Safety) Act – Department of Mines and Energy – Tenure – Process safety – Front line management

  • Environmental Protection

Act – Department of Environment and Heritage Protection – Environmental protection – Audit/compliance Tenure Environmental authority

Saturday, 11 May 13

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SLIDE 11

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

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SLIDE 12

Environmental authorities

Saturday, 11 May 13

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SLIDE 13

Environmental Authority Model Conditions

  • General conditions
  • Water
  • Groundwater
  • Regulated structures
  • Land
  • Disturbance to land
  • Environmental nuisance
  • Air
  • Waste
  • Rehabilitation
  • Well construction,

maintenance and stimulation activities

  • Community issues
  • Notification
  • Sewage treatment
  • Release to water of good

quality CSG water

  • Disturbance to land with

biodiversity values

Saturday, 11 May 13

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SLIDE 14

Environmental impacts

Saturday, 11 May 13

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SLIDE 15

Seismic line

Saturday, 11 May 13

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SLIDE 16

Light weight vertical drill rig

Saturday, 11 May 13

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SLIDE 17

CSG well, power supply and water

Saturday, 11 May 13

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SLIDE 18

Pennsylvania countryside

  • Shale gas wells

Saturday, 11 May 13

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SLIDE 19

Instant tank

Saturday, 11 May 13

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SLIDE 20

Aggregation dam

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SLIDE 21

Severe erosion to dam wall

Saturday, 11 May 13

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SLIDE 22

Pivot irrigation, Wyoming

Saturday, 11 May 13

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Pipeline and cattle crossing

Saturday, 11 May 13

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SLIDE 24

Condamine River crossing

Saturday, 11 May 13

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SLIDE 25

Compressor station

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SLIDE 26

Compressor station

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SLIDE 27

Main line compressor

Saturday, 11 May 13

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SLIDE 28

Well integrity problem

Saturday, 11 May 13

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SLIDE 29

Surat Basin Hydrogeological Model

Saturday, 11 May 13

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SLIDE 30

Cumulative Management Area

Saturday, 11 May 13

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SLIDE 31

Hydraulic fracturing

Saturday, 11 May 13

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SLIDE 32

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SLIDE 33

Saturday, 11 May 13

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SLIDE 34

Typical frac spread for shale

Saturday, 11 May 13

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SLIDE 35

Frac Fluid Make-up

Saturday, 11 May 13

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SLIDE 36

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

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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 efgective

Saturday, 11 May 13

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SLIDE 38

Barnett Shale gas wells, Texas

Saturday, 11 May 13

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SLIDE 39

Other issues

Saturday, 11 May 13

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SLIDE 40

Land access issues

Saturday, 11 May 13

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SLIDE 41

Issues

  • Strategic Cropping Land
  • Health issues
  • Competing tenures
  • Salt
  • International Network for Environmental

Compliance and Enforcement

Saturday, 11 May 13

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SLIDE 42

Saturday, 11 May 13