About Gas Hydrates, Indian Scenario, Worldwide Occurrence, Phase Diagram for the presence of Gas Hydrates in Permafrost region and Marine Environment, Techniques for Extraction, Problems and Challenges, Major Players for Production of Gas Hydrates, Policy's for Production and Future of Gas Hydrates.
Salient Features of India constitution especially power and functions
GAS HYDRATES.pptx
1. PRESENTED BY:
ARPIT I. POUNIKAR-(500089073)
DEVESH R. UMREDKAR-(500089769)
PUSHPAK R. LAKHE-(500089772)
2. CONTENTS
INTRODUCTION
WORLDWIDE OCCURENCE
GAS HYDRATES IMAGES
PHASE DIAGRAM
TECHNIQUE FOR EXTRACTION
MAJOR PLAYERS
CHALLENGES
PROBLEMS
POLICIES
FUTURE OF GAS HYDRATES
REFERENCES
3. INTRODUCTION
• Gas Hydrates are the crystalline solids, consists of a gas
molecule surrounded by the cage of water molecules.
• Each molecule of gas hydrate contains up to 164m3 of methane
(CH4).
• They are of 2 types : Structure I and Structure II.
Structure I – Methane, Ethane, CO2.
Structure II – Propane, Isobutane
• High Pressure (>3000 KPa) and
Low Temperature (<22 degree Celsius)
conditions.
• Depth- 2000- 4000m
www.researchgate.net/publication/316891048_Pr
oposal_of_experimental_device_for_the_continuou
s_accumulation_of_primary_energy_in_natural_gas
_hydrates/figures?lo=1
7. INDIAN SCENARIO
• India holds worlds 2nd largest
reserve.
• Total Estimate is about 140 TCF.
• In 1997, 1st GH Exploratory activity
was conducted by DGH.
• KG Basin, Mahanadi and Andaman
, Kerala- Konkan And Eastern parts
of India.
• Among this Krishna Godavari hold
the Highest percentage (130 TCF).
www.researchgate.net/publication/276916125
9. TECHNIQUES FOR EXTRACTION
1. DEPRESSURISATION
• Lowering the pressure of
Hydrate Reservoir.
• Dissociation of underlying
hydrates clathrates.
• External Source of heating can
be incorporated for lowering
the pressure.
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60/32322668456_918d0608
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10. TECHNIQUES FOR EXTRACTION
2. THERMAL STIMULATION
• Intentional heating of the
reservoir.
• Injecting steam or hot water by
electric means.
• Leads to dissociation of
hydrate and release of gas.
• Some extra heat source are in-
situ combustion of Methane,
electromagnetic heating
through microwave energy.
https://live.staticflickr.com/660/
32322668456_918d0608a3_b.jp
11. TECHNIQUES FOR EXTRACTION
3. CHEMICAL INHIBITOR
• It work on the mechanism of
shifting of gas hydrate phase
boundary.
• Shifting of phase boundary to
high pressure and low
temperature reservoir
condition.
• Injection of additives
alcohols(methanol), glycols,
salts. https://live.staticflickr.com/660/323226
68456_918d0608a3_b.jpg
12. TECHNIQUES FOR EXTRACTION
4. CO2- CH4 EXCHANGE
• Injection of CO2 into
hydrate bearing reservoir.
• Chemical exchange
reaction releases CH4 and
traps CO2.
• CO2 hydrate is
thermodynamically more
stable than CH4 at lower
temperature.
13. PROBLEMS
• Thermal Injection - Unavoidable heat loss due to
host rock.
• Depressurization - Endothermic nature causing
decrease in reservoir temperature.
• Inhibitors - Methanol and ethylene glycol are
expensive chemicals.
14. MAJOR PLAYERS IN GAS HYDRATE PRODUCTION
Some of the leading gas hydrates manufacturers include:
• Global Oil & Gas AG
• PetroChina
• Royal Dutch Shell
• Sinopec
• Total SA
• Valero Energy
• Marathon Petroleum Corporate
• Chevron
• Woodside Inc.
15. CHALLENGES
• Economic Challenges-
1. R&D program for gas hydrate requires high cost for extraction as it
will be only viable when conventional Hydrocarbon price increases.
2. Deep water and artic location cost more expenses and have high risk.
• Environmental Challenges-
1. Methane emission causes Global Warming and climate change.
2. Shallow depth hydrate deposits cause more ocean warming which
leads to climate change.
• Produced Water Disposal-
1. As produced water is contaminated , it should be treated properly.
2. This water can impact health and environmental hazard.
16. POLICIES
1. Open Acreage Licensing Policy (OALP)- This enables companies
to bid for oil and gas blocks without waiting for announcement
of Bidding.
2. Uniform Licensing Policy (ULP)- Both Unconventional and
Conventional resources can be exploited under same license
under Oilfields Regulation & Development (ORD) Act,1984.
3. National Exploration Licensing Policy(NELP)- It focuses on the
Foreign Direct Investment (FDI) in exploration & production
activities.
4. Hydrocarbon Exploration & Licensing Policy (HELP)- Single
License for all Hydrocarbon, Revenue Sharing Model stepping
towards improving the “Ease of Doing Business” in Indian E&P
Sector.
17. FUTURE OF GAS HYDRATES
DATA STATISTICS
2022- Gas Hydrate Market Size 2800 Million $
2032- Gas Hydrate Market Forecast 4500 million $
2022-2032 Growth rate 4.7% CAGR
