data overview - kuwait oil company technolo… · 22 kuwait environmental remediation projects...
TRANSCRIPT
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“Restoring Kuwait Treasures”
KERPKuwait Environmental Remediation Projects
Data Overview
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Kuwait Environmental Remediation ProjectsAvailable Data Overview
1. Historic Data 2. Recent Data 3. Future Data
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Kuwait Environmental Remediation ProjectsAvailable Data Overview
PRELIMINARY INVESTIGATION
Supplementary
Main
Preliminary
Ris
k r
ed
uctio
n
Industry Standard Approach
1. Historic (CIC) Data
CIC (2002)
Random distributed sampling
1300 locations over 114
km2
6000 additional inspection
pits
3900 samples
for 26M m3
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Kuwait Environmental Remediation ProjectsAvailable Data Overview
Areas of interest
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Kuwait Environmental Remediation ProjectsAvailable Data Overview
North Kuwait (Umm Al Aish and Raudhatain)
23 km
21 km
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Kuwait Environmental Remediation ProjectsAvailable Data Overview
South Kuwait (Burgan)
38km
20km
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Kuwait Environmental Remediation ProjectsAvailable Data Overview
What does the CIC data tell us?
Layers
Wet Oil Lakes,
Dry Oil Lakes,
Contaminated PilesFeatures
Particle Size
Ranging from
<1% to ~70%
Depth
Banded TPHTPH
Sand (max 95%), Fines (max 40%)
Sludges, crusts, oil
contaminated sands
25% 8%
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Kuwait Environmental Remediation ProjectsAvailable Data Overview
� Typical wet oil lake feature
� Transition area between wet and dry oil lake features
� Example of Layering
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Kuwait Environmental Remediation ProjectsAvailable Data Overview
• No UXO assessment or clearance resulting in limited data. CIC assessment predominantly from edges of WOL
• Comprises either a sludge, oil or variable crust at surface (bituminous/soft to hard), known as Layer 1, of 0.02m to 0.9m thickness
• Can contain discrete water / emulsion lenses within Layer 1
• Underlying oil contaminated sand with general decreasing concentrations of TPH, known as Layer 2
• Average depth of contamination estimated as 0.65m (though the combined depth of Layer 1 and Layer 2 can range from as little as 0.08m to 2.32m, the latter is not common)
• Coverage: 7.18 km2 of the 114 km2
• Layer 1: Typical
concentration is >10%.
(TPH concentration range: 18,100
mg/kg (1.8%) to 679,000 mg/kg
(67.9%).)
• Layer 2: Typical
concentration is <10%.
(TPH concentration range: 1,040
(1%) mg/kg to 349,000 mg/kg
(34.9%))
Wet Oil Lake (WOL) Features – Summary
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Kuwait Environmental Remediation ProjectsAvailable Data Overview
� Typical Dry Oil Feature
� Typical Dry Oil Cross- Section
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Kuwait Environmental Remediation ProjectsAvailable Data Overview
Dry Oil Lake Features - Summary
• Variable crust at surface (from soft
bituminous to cemented) known as Layer 1
• Underlying oil contaminated sand with
general decreasing concentrations of TPH,
known as Layer 2
• Average depth: 0.27m (Burgan), 0.17m
(North Kuwait) - (though the combined depth
of Layer 1 and Layer 2 can range from as
little as 0.01m to 2.88m, the latter is not
common)
• Estimated land coverage 98 km2 of the
114km2
• Layer 1: Typical concentration is
>5-20%
(TPH concentration range 447 mg/kg to
694,000 mg/kg (69.4%))
• Layer 2: Typical concentrations are
between 1% and 10% (TPH
concentration range 420 mg/kg to 413,000
mg/kg (41.3%))
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Kuwait Environmental Remediation ProjectsAvailable Data Overview
� Oil Contaminated Piles
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Kuwait Environmental Remediation ProjectsAvailable Data Overview
Oil Contaminated Piles
• Highly variable composition (heterogeneous) – clean through to highly contaminated
• Height of piles range from 0.45m to 7.0m• Estimated land coverage of 8.6 km2 of
the 114 km2
• TPH concentration range: 470
mg/kg to 258,000 mg/kg
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Kuwait Environmental Remediation ProjectsAvailable Data Overview
What does the CIC data not tell us?
Variation
Spatial distribution
Layer Thickness
TPH Concentration
Physicality
Inaccurate
Feature Boundaries
Volumetric Estimations
Concentrations
Expectations
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Kuwait Environmental Remediation ProjectsAvailable Data Overview
Other CIC work
Limited Bench Scale Studies
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Kuwait Environmental Remediation ProjectsAvailable Data Overview
LIMITED SCOPE INVESTIGATION
Burgan - South East Kuwait
Supplementary
Main
Preliminary
Ris
k r
ed
uctio
n
Industry Standard Approach
2. Current Data
KERP (Nov 2014)
Data gap analysis
Discrete sampling
205 sample
locations
Feature Radials
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Kuwait Environmental Remediation ProjectsAvailable Data Overview
Wet oil lake feature hand-dug inspection pits (Nov 2014)
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Kuwait Environmental Remediation ProjectsAvailable Data Overview
Dry oil lake feature hand dug inspection pits (Nov 2014)
Thin crust (Layer 1)
Contaminated Sand (Layer 2)
‘Clean’ Sand (Layer 3)
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Kuwait Environmental Remediation ProjectsAvailable Data Overview
Variable thickness of contaminationConsistent thickness
of contamination
Dry oil lake feature hand dug inspection pits (Nov 2014)
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Kuwait Environmental Remediation ProjectsAvailable Data Overview
During site investigation (Nov 2014)
During sample collection (Jan 2015)
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Kuwait Environmental Remediation ProjectsAvailable Data Overview
� Key findings to date:
� TPH is dominated by >EC34
� PSD confirms fines content
�Resins and asphaltines are present within higher TPH concentrations
� A hard crust, known as tarcrete, derived from aerial deposition of crude oil from wells, can be mistaken for dry oil contamination.
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Kuwait Environmental Remediation ProjectsAvailable Data Overview
3. Future Data
Main Investigation:
Site Soil Characterization
Contaminant Concentrations
VolumetricExtent &
Depth2016 - 2017
Risk Assessments
Remediation Design
Baseline Information
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Kuwait Environmental Remediation ProjectsAvailable Data Overview
Further information is
available on the KOC
website.
www.kockw.com
The data provided in this presentation is for information only