ucgtcpatraindia-110805093253-phpapp01

7/27/2019 ucgtcpatraindia-110805093253-phpapp01

1/46

Underground Coal Gasification

T C PatraSr RE

INDIA


2/46


COALIFICATION PROCESS

GASIFICATION PROCESS UNDERGROUND (IN SITU) PROCESS

. covers


3/46



GASIFICATION PROCESS UNDERGROUND (IN SITU) PROCESS


4/46



COALIFICATION

PROCESS IN

REDUCINGENVIRONMENT


5/46


CHEMICAL COMPOSITION OF COAL

Fuel C H O N

Wood 49.65 6.23 43.20 0.92

Peat 55.44 6.28 35.56 1.72

Lignite 72.95 5.24 20.50 1.31

Bituminous 84.24 5.55 8.69 1.52

Anthracite 93.50 2.81 2.72 0.97

Clarke


6/46


CHEMICAL COMPOSITION OF COAL

Rank Moisture Vol.Matter FixedCarbon Ash

Lignite 34.55 35.34 22.91 7.20

Sub-

Bituminous

24.28 27.63 44.84 3.25

Bituminous 3.24 27.13 62.52 7.11

Semi-

Anthracite

3.38 8.47 76.65 11.50

Anthracite 2.80 1.16 88.21 7.85

After Moore


7/46


INDIAN COAL


8/46



9/46


COAL PROVED RESERVES

Million Tonnes_End 2001_BP statistics


10/46


COAL PROD VS. CONSUMPTION

-

20.0

40.0

60.0

80.0100.0

120.0

140.0

160.0

180.0

200.0

1981

1982

1983

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

-

20.0

40.0

60.0

80.0100.0

120.0

140.0

160.0

180.0

200.0Prod (Million Ton OE)Consumption (Million Ton OE)


11/46


WORLD PRIMARYENERGYCONSUMPTION

9124.8594.5601.22255.12164.33510.6WORLD

335.25.838.784.474.6131.6Germany

514.520.472.7103.071.1247.2Japan

643.039.830.9114.6335.4122.3Russia

314.716.14.4173.523.797.1India839.758.34.0520.624.9231.9China

2237.348.3183.2555.7554.6895.6USA

TotalHydroelectric

NuclearEnergy

CoalNaturalGas

OilMilliontonne oil

equivalent

India is the 3rdlargest coal consumer of the world

R/P : 246 years


12/46



GASIFICATION PROCESS

UNDERGROUND (IN SITU) PROCESS


13/46


CARBON/COAL GASIFICATION

REACTIONS

Partial Combustion C + O2 = 2CO exothermic

Combustion C + O2 = CO2 exothermic

C + CO2 = 2CO endothermic

Water-Gas C + H2O = CO + H2 endothermic

Hydrogasification C + 2H2 = CH4 exothermic

Shift CO + H2O = CO2+ H2 exothermic

Reformation CO + 3H2 = CH4+ H2O exothermic


14/46


15/46


MATERIAL BALANCE

AIR GASIFICATION

H2O - (153.9)C - 1000

H - 79.6

O - 230.8

N - 13.3


16/46


MATERIAL BALANCE

GASIFICATION WITH O2+H2O liq


17/46


MATERIAL BALANCE

GASIFICATION WITH O2+H2O liq

H2O - (153.9)

C - 1000

H - 79.6

O - 230.8

N - 13.3


18/46


MATERIAL BALANCE

GASIFICATION WITH O2+H2O Steam

H2Oliq

1575.1 Kg


19/46


20/46



GASIFICATION PROCESS

UNDERGROUND (IN SITU) PROCESS


21/46


UNDERGROUND COAL

GASIFICATION

A process to convert

unmineable under-ground

coal/ lignite intocombustible gases by

gasifying the coal insitu


22/46


ESSENTIAL STEPS IN UCG

Drill wells into coal seam Create a permeable link

path

Ignite coal at bottom

Inject air (or oxygen) to

sustain fire

Remove product gas

through production well

Clean product gas in

surface facilities for end

use


23/46


.. where we STAND..

.. what we SEE..

.. what we FACE..

.. what we SEEK..


24/46


.. where we STAND..


25/46


26/46


UCG REACTORS - WORLD

Site Depth (m) Year Gas Produced

(Million m3)

Hanna 85 1973-79 63.56

Hoe Creek 50-120 1976-79 12.18

Price Town 270 1979 1.39

Rawlins 30 1979-81 17.35

Centralia 75 1983 1.78

Hanna ( RockyMt.1) 110 1987-88 13.10

USA fields


27/46


UCG REACTORS - WORLD

Site Depth (m) Year Gas Produced(Million m3)

Bruay-en-

Artois (France)

65 1978-81

La aute Deule

(France)

60 1979-85

Thulin

(Belgium)

860 1986-87 0.55

Alcorisa(Spain) 500-700 1990 -

European fields


28/46


.. What we SEE..


29/46


30/46


WHY UCG IN INDIA

Use of produced gas for power

generation or for chemical feed-

stocks

Potential use of carbon di-oxide for

Enhanced Oil Recovery (EOR) exists

in the area


31/46


UCG POTENTIAL IN INDIA

POTENTIAL AREAS SOBHASAN, KALOL AND

MEHSANA CITYSTRUCTURE OF NORTHGUJARAT

ESTIMATED COAL/ 123BILLION TONNESLIGNITE RESERVES (700-1700 M DEPTH)

EXPECTED ENERGY EQUIVALENT TO ABOUT15000BILLION M3OFNATURAL GAS (Meh-AhmBlock)


32/46


UCG POTENTIAL

GSI

234 Bt coal

(Around 150 Btat

unmineable depth)

ONGC

>350 Bt (Unmineable depth)

63 Bt in

Mehsana-

Ahmedabad

Block

60 Bt in

Patan-

Tharad

Block

>200 Bt in

Bengal

Basin

Equivalent to

15000 Billion m3

of Natural Gas10%

Equivalent to 1.35 times of

O+OEG reserves of ONGC


33/46


.. what we FACE..


34/46


EXPERIENCE IN UCG PROJECT

In mid 80s a UCG National Committee was set upto look into the UCG project wherein ONGC was

the nodal agency

Proposed site was in Mehsana city structure

Two Information wells were drilled

Hydrological studies conducted

Core studies conducted


35/46


EXPERIENCE IN UCG PROJECT

3-D Seismic survey carried out

Prepared Geological model

Design pilot wells


36/46


Proposed Site


37/46


GENERAL PROPERTIES FOR

FAVOURABLE UCG SITE

Thickness of 3 to 10m

Steeply dipping - (Flat lying acceptable)

Strong, dry roof rock

Coal seam shall not be major aquifer No major aquifer over coal seam at least twice of

stable cavity height

Low natural permeability of formation

No major faults or fractures

Amenable topography

Proximity to end user market


38/46


UCG PILOT PROJECT IN INDIA

PILOT PROJECT SITE : MEHSANA CITY

STRUCTURE

TARGET COAL SEAM : SOBHASAN - III

DEPTH OF COALSEAM : 900-1100 M

THICKNESS OF COAL

SEAM : 6-14 M

TYPE OF COAL : LOW RANK SOFT,

DARK BROWN

LIGNOBITUMINOUS


39/46


40/46



41/46


UCG PILOT PROJECT IN INDIA

The pilot could not be executed due to

Limited expertise available then

Non-availability of OIDB funds


42/46


43/46


TECHNOLOGICAL

REQUIREMENTS

Drilling, Special cementing, Design and

Completion of Process wells

Combustion process package ( Ignitor, Cavity

formation, Propagation) Process of CRIP (Controlled Retracting Injection

Point)

Surface design for UCG


44/46


.. what we SEEK..


45/46


Participation Required

Resource Characterisation

Coal Seam Properties Hydrologic Characteristics

Laboratory investigations of coal properties

Laboratory Gasifier experiments

Reaction Kinetics Subsidence studies

Detailed Engineering design of pilot

Development of process options for UCG product

Gas cleanup. Simulation of underground process

and lot more


46/46

ucgtcpatraindia-110805093253-phpapp01

Documents

Transcript of ucgtcpatraindia-110805093253-phpapp01