ALL SEISMIC EXPLOSIVES ARE NOT THE SAMElafayettegeologicalsociety.org/wp/wp-content/...Explosives...

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ALL SEISMIC EXPLOSIVES ARE NOT THE SAME So what do we do about it? 2014

Transcript of ALL SEISMIC EXPLOSIVES ARE NOT THE SAMElafayettegeologicalsociety.org/wp/wp-content/...Explosives...

  • ALL SEISMIC EXPLOSIVES

    ARE NOT THE SAME

    So what do we do about it?

    2014

  • 2

    Discussion Points

    Seismic Explosive

    Types Composition

    Products of Detonation

    Source Test Goals

    Field Test Data

    Economics

    Conclusion

    Buggy Pit Drill East Texas

  • 3

    Seismic Explosive Types

    Composition

    Molecular - Pentolite

    Molecular Composite - Dynamite

    Composite - Emulsion

  • 4

    Explosives Systems for Geophysical Exploration

    Premium Elastic Wave Generation

    PETN (Pentaerythritol

    Tetranitrate) Very sensitive molecular

    explosive

    TNT (trinitrotoluene) Molecular high

    explosive

    Aluminum (Al) Bio-organism Tablets & Nutrients

    Pentolite INGREDIENTS

  • 5

    Explosives Systems for Geophysical Exploration

    PRODUCTS OF DETONATION

    Methane

    Carbon Dioxide (CO2)

    Nitrogen

    Carbon

    Aluminum Oxide

    Substance State

    Gas

    Gas

    Gas

    Solid

    Solid

    74

    283

    140

    78

    425

    Grams / 1 kg charge

    Premium Elastic Wave Generation

    Pentolite

  • 6

    Explosives Systems for Geophysical Exploration

    PRODUCTS OF DETONATION

    Methane

    Carbon Dioxide (CO2)

    Nitrogen

    Carbon

    Aluminum Oxide

    Substance State

    Gas

    Gas

    Gas

    Solid

    Solid

    90

    600

    170

    27

    78

    Grams / 1 kg charge

    Bioremediation Technology

    Pentolite

  • 7

    Explosives Systems for Geophysical Exploration

    Seismic Energy Source

    ®

    INGREDIENTS

    Gum

    Nitroglycerin (Nitrated Diethylene Glycol)

    Ethylene Glycol Dinitrate

    Ammonium Nitrate

    Sulfur Micro Balloons

    Sodium Nitrate

    NG Dynamite

  • 8

    Explosives Systems for Geophysical Exploration

    Seismic Energy Source

    ®

    PRODUCTS OF DETONATION

    Water (steam)

    Carbon Dioxide (CO2)

    Nitrogen

    Calcium Carbonate

    Sodium Carbonate

    Substance State g / 1 kg Charge

    Gas

    Gas

    Gas

    Solid

    Solid

    0.94

    2.11

    0.76

    0.05

    1.14

    188

    421

    153

    10

    228

    lb / 5 lb Charge

    NG Dynamite

  • Explosives Systems for Geophysical Exploration

    INGREDIENTS

    Water (H2O)

    Microballoons Glass density control

    Sodium Nitrate Common fertilizer

    Ammonia Nitrate Common fertilizer

    (basic ammonia & nitric acid)

    Aluminum (Al) Metallic Element

    White Mineral Oil

    Emulsion Seismic Energy Source

  • Explosives Systems for Geophysical Exploration

    PRODUCTS OF DETONATION Emulsion Seismic Energy Source

    Water (steam)

    Carbon Dioxide (CO2)

    Nitrogen

    Carbon

    Aluminum Oxide

    Sodium Oxide

    Silica

    Substance State

    Gas

    Gas

    Gas

    Solid

    Solid

    Solid

    Solid

    450

    109

    247

    12

    113

    44

    25

    Grams / 1 kg charge

  • 11

    Seispro®

    (emulsion)

    Geophysical Exploration Explosives Comparison

    CALORIES / GRAM represents the

    chemical energy that produces shock,

    heat and gas energy. The value

    indicates the absolute weight strength

    of the explosive.

    GAS VOLUME (moles/kg)is an

    expression of the effects of the

    detonation.

    VELOCITY OF DETONATION (VOD)

    (ft/sec above, m/sec below) of an

    explosive is the average speed of the

    detonation.

    DETONATION PRESSURE (Kbars)

    increases with an increase in density or

    VOD. Detonation Pressure (Kbar) = 2.5

    x density x velocity2(m/sec) x 10-6

    DENSITY (g/cc) Density contributes to

    Velocity of Detonation.

    1,000

    35.5

    16,075

    4,900

    70

    1.18

    1,880

    20.5

    23,950

    7,300

    227

    1.70

    1,500

    27.9

    24,600

    7,500

    230

    1.63

    1,250

    26.0

    20,000

    6,100

    133

    1.43

    Geoprime®

    (pentolite)

    VIBROGEL®

    (dynamite)

    Geoprime®

    dBX®

    SEISMIC ENERGY SOURCE

    = Premium Elastic Wave Generation * *

  • 12 Benefit of Lower Gas Volume

    Fractured earth absorbs and scatters energy – diminishes elastic wave amplitude and propagation

    Excess gas vents through borehole creating safety, environmental and reclamation problems

    Conventional Explosive dBX

    Consolidated earth conducts more of the energy – results in improved elastic wave penetration

    Effect of shock energy plus gas volume Effect of shock energy

    dBX Technology

  • 13

    GOALS

    Improving seismic data quality through explosive testing

    • Improve energy transfer

    • Improve signal to ambient noise ratio

    • Increase seismic bandwidth

    • Increase reflected signal strength

    • Improve imaging in final processed data

    • Improve Economics

    Seismic Explosive Source Tests

  • 14

    Alberta Canada – Carbon Field

    Los Banos – California USA

    Client Source Study – Alberta Canada

    Migrated 3D – Alberta Canada

    Seismic Explosive Source Test Data Sets

  • 15

    1500 g (3.3 lb) dBX 2043 g (4.5 lb) Pentolite

    Carbon Field Test Shot Records (Relative Amplitude)

  • 16

    Averaged Spectra

    1000-3000 ms Window

    Trace 1 - 116

    ____

    1500 g

    dBX

    ____

    2043 g

    Pentolite

    Carbon Field Test: Shot Record Spectra

    8 dB gain over Pentolite at 75% of the explosive weight

  • 17

    California Field Test Relative Amplitude

    Color showing the

    signal to noise uplift

  • 18

    California Field Test - Spectra Analysis

    12 - 15 dB gain across the spectra

  • 19

    • 8 explosive types tested

    • 4 explosive manufacturers

    • 50 ft hole depth

    • Charge sizes: 1 kg, 2kg, 4kg, 8kg and 16 kg

    • Duplicates on each product at both line ends

    • Oil company designed, conducted, processed and evaluated the data

    Alberta Compressive Field Study

  • 20

    Alberta Compressive Field Study

    Geoprime dBX

    SeisPro dBX

    Geoprime

  • 21

    Alberta Compressive Field Study

    Geoprime dBX

    SeisPro dBX

    Geoprime

  • 22

    652 Source Points, double drilled

    - Vibrogel (NG Dynamite)

    - dBX

    Static 3D Spread

    Random Source Recording

    Identical Processing through Migration

    Alberta 3D Test

  • 23

    Geometric Spreading Correction

    Refraction and Residual Statics

    NMO – Mute- CMP Sort

    Stack

    3D FK Filter – attenuates linear propagated noise

    DAS (Pred. Dist. = 12ms, Oper. = 220ms)

    12 Hz low cut filter

    3D RNA – random noise attenuation (FX Decon)

    3D Extended Stolt Migration

    Residual Amplitude Compensation (RAC) Single time variant gain function calculated on ME brute stack and applied to both datasets

    Alberta 3D Test Processing Flow

  • 24

    Grande Prairie Vibrogel Migrated Stack

  • 25

    Grande Prairie dBX Migrated Stack

  • 26

    75 SQUARE MILE SHOT HOLE 3D - $5,000,000+ TESTING COSTS – 1.2% of 3D ($60,000)

    Drilling 25 Test holes - $10,000 Recording 5 mile test line - $40,000 PPV Test - $3,500 Permits Drills and Recording crew mobilization can impact these prices

    SAVINGS can be $100,000+ 100’ hole with 11 lbs. = $335 100’ hole with 5.5 lbs. = $300 80’ hole with 5.5 lbs = $285 $35 X 5,400 = $189,000 $55 X 5,400 = $297,000

    Seismic Testing Economics (Gulf Coast) January 2014

  • 27

    Most new field discoveries have old seismic data over them

    Poor seismic data quality results in reserves being left behind for the next company - Limited bandwidth

    - Low signal amplitude

    - Poor spatial sampling

    What did those lost reserves cost your company?

    DON’T LEAVE RESERVES BEHIND

  • 28

    Every explosive type has different chemical makeup and different products of detonation

    Determine your test goals and design your test accordingly

    The earth responds differently from one geographic area to another

    Testing can save you money while improving you data quality

    Discover more reserves from improved data quality

    Conclusions

  • Dyno Nobel

    Seismic Products Technical Information and MSDS

    at

    http://www.dynonobel.com/resource-hub/products/seismic

  • Thank you

    to

    DYNO NOBEL

  • 31

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    50 SQUARE MILE SHOT HOLE 3D - $8,000,000 TESTING COSTS – 1% of 3D ($80,000)

    Drilling 25 Test holes - $25,000 Recording 5 mile test line - $50,000 PPV Test - $3,500 Permits Drills and Recording crew mobilization can impact these prices

    SAVINGS can be $360,000+ (Heli-Portable) 60’ hole with 11 lbs. = $1,300+ 40’ hole with 11 lbs. = $1,100+ $50 X 3,600 = $180,000 $100 X 3,600 = $360,000

    Seismic Testing Economics (Rockies) January 2014

  • 34

    75 SQUARE MILE SHOT HOLE 3D - $5,000,000+ TESTING COSTS – 1% of 3D ($51,000)

    Drilling 25 Test holes - $7,500 Recording 5 mile test line - $40,000 PPV Test - $3,500 Permits Drills and Recording crew mobilization can impact these prices

    SAVINGS can be $250,000+ 100’ hole with 11 lbs. = $350 80’ hole with 5.5 lbs. = $285 40’ hole with 5.5 lbs. = $190 20’ hole with 3.3 lbs. = $145 $45 X 6,400 = $288,000 $65 X 6,400 = $416,000

    Seismic Testing Economics (California) January 2014