[ raniganj coal field, west bengal ] · 2015. 5. 12. · raniganj formation barren measures barakar...
TRANSCRIPT
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NATIONAL GEOSCIENCE AWARD - 2013
FIELD : COAL, LIGNITE & CBM DISCOVERY & EXPLORATION
[ RANIGANJ COAL FIELD, WEST BENGAL ]
Recipients: 1. Subrata Kumar Sardar, Sr. Geologist
2. Mohan Das Roy, Ex-GSI
3. Resmi, R.C., Geologist
4. Anima Gogoi, Geologist
5. Jyoti Sankar Roy, Director.
-
2
Gondwana Coalfields of India
Uttarpradesh.
Madhyapradesh.
Maharashtra.
Bihar
Jharkhan
d
Stores >99% of coal resource of country
-
DAMODAR-KOEL VALLEY BASIN BELT
24°
50 0 50km
Scale
89325.75 Million tonne coal resource (29% of national total)
31712.01 Million tonne coking coal resource (93% of national total)
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RANIGANJ COALFIELD
Storehouse of superior quality non-coking coal
used for cement, paper, sponge iron etc.
Talchir
Barakar
Raniganj
Panchet
Suprapanchet300m
600m
1150m
600m
750m
500m
Barren
Measures
-
TRANS-AJAY SECTOR
3.5 0 3.5 7 km
#
#
#
#
10
20
12
12
20
10
RN-2 (s)
RN-1
Bachra
Barkolaa
Bi rkulti
Dalurband
#
Trans-Ajay Sector ~ 100 sq km
Barakar and Barren Measures below thin alluvium
10 sq km in the western end under mining / leasehold
-
PREVIOUS WORK
Parsundih
Barhra
Barul
Bagdiha
BARUL-BAGDIHA SECTOR
KASTA AREA
N
8°
10°
0 1 km
SCALE
4°
RK-9
A
C
3°D AJOY RIVER
Raniganj Formation
Barren Measures
Barakar Formation
Basement
1964-1967: GSI worked in Kasta Area (Barakar Formation) covering 30 sq km
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CONCLUSIONS FROM KASTA
3 seams - cumulative seam thickness varies
from 10.86m to 2m
only top one is important and persistent
quality and thickness deteriorated – Eastward
Area is not potential for future exploration
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RETROSPECTION AT BARUL-BAGDIHA SECTOR
10.30
5.24
1.92
5.75459.25
470.13
474.90
481.35
2.21
4.68
4.68335.15
343.20
350.37
362.10
4.09
23.21m
15.66m
RBB-8 RBB-5
23o44/
87o10/87o08/
87o10/87o08/
23o45/
23o44/
RBB-2
RBB-1RBB-8
RBB-4
RBB-5RBB-3
RBB-7
RBB-6
23o45/
0 500m
SCALE
20m 130m
80m
80m
RBB-9
ParsundihBarhra
BarulBagdiha
N
8°
10°
4°
RK-9
A
C
3°D AJOY RIVER
Thickness variation of Salanpur A Seam
-
N RK-3
RK-1
13m
33m
9m
95.35
RK-1: Kasta borehole
RBB-8: Barul-Bagdiha borehole
Cumulative coal content9m
RBB-8
25.00
87.87
Dip Direction
RETROSPECTION AT BARUL-BAGDIHA SECTORContd.
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INVESTIGATED BLOCKS
2002-2013: North of Ajay River under the Barren Measures
probed in five (5) Blocks / Areas totaling 59 sq km
TAMRA BLOCK 2002-2006 8.5 sq km
NABASAN BLOCK 2005-2009 6.0 sq km
BINODPUR-BHABANIGANJ BLOCK 2008-2010 14.0 sq km
EAST OF BHABANIGANJ AREA 2009-2012 10.5 sq km
SOUTH OF HINGLA AREA 2010-2013 20.0 sq km
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Raniganj Formation
Barren Measures
Barakar Formation
Basement
PRESENT WORK
Parsundih
Barhra
Barul
Bagdiha
Tamra block
BARUL-BAGDIHA SECTOR
KASTA AREA
N
8°
10°
0 1 km
SCALE
4°
RK-9
A
C
Nabasan
3°
RT-3
D AJOY RIVER
Y'
2002-06
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PRESENT WORK
ONEGEOLOGY
(IGCP PROJECT 624)
N RK-3
RK-1
RT-2
354.00
13m
16m
16m
34m
33m
9m
95.35
126.10
RT-5
RT-3
RK-1: Kasta borehole
RT-1: Tamra borehole
RBB-8: Barul-Bagdiha borehole
Cumulative coal content9m
Dip Direction
RBB-8
25.00
297.50
87.87
RT-1
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PRESENT WORK
Raniganj Formation
Barren Measures
Barakar Formation
Basement
Parsundih
Barhra
Barul
Bagdiha
Tamra block
BARUL-BAGDIHA SECTOR
KASTA AREA
N
8°
10°
0 1 km
SCALE
4°
RK-9
NabasanRNB-2
RNB-1
RNB-5
RNB-3
RNB-4
Binodpur-BhabaniganjBlock
3°
RNB-6RBBJ-1
RBBJ-2
RBBJ-4
RBBJ-3
RBBJ-6
RBBJ-5
RBBJ-8
RBBJ-7
RT-3
NabasanBlock
East of BhabaniganjArea
REB-1
AJOY RIVER
RBBJ-9
RBBJ-10
REB-2
RBBJ-12
REB-3
RBBJ-11
PRESENT WORK
-
PRESENT WORK
Dip Direction
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SIGNIFICANCE
Dip Direction
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OUTCOME
25%
67%
8%
Augmentation of Power-grade coal Resource
552 mt over 59 sq. km area
depth zone
0-300m
300-600m
below 600m
% of Resource
CBM: RSH-5 in situ gas content < 1gm / cc
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ALTERNATIVE UTILISATION OF RESOURCE
COAL GASIFICATION
Raniganj Formation
Barren Measures
Barakar Formation
Basement
Parsundih
Barhra
BarulBagdiha
N
8°
10°C
N
Thickness: 25 – 2 m
Rank: Sub-Bituminous to
High volatile bituminous
Dip: 7o to 11o
Ash: 29-45% Moisture: 2- 5.7%
Roof: 20m thick shale above seam
-
High percentage of hydrogen-rich maceral (Liptinite ) upto 42 %
along with Sub-Bituminous to High volatile bituminous rank
indicate suitability for LIQUEFACTION in the northern part of
Trans-Ajay sector
Raniganj Formation
Barren Measures
Barakar Formation
Basement
Parsundih
Barhra
BarulBagdiha
N
8°
10°
0 1 km
CAround 135 mt within
0-300m depth
ALTERNATIVE UTILIZATION OF RESOURCE
COAL LIQUEFACTION
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PRESENT APPROACH
(a)Concept-based tectono-sedimentary knowledge of basin
analysis will help to identify additional potential areas of
Barakar coal horizons at shallower to intermediate
depth elsewhere, particularly to the western part of RCF.
(b) Enhanced ‘National Energy Scenario’.
Power-grade Coal of relatively higher quality (Grades: B
& C) intersected to the west & central parts of Trans-
Ajay.
(c) Societal value: nearby area development.
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COAL BED METHANE
RSH - 5: in situ gas content < 1gm / cc
Ro (mean) 0.41 - 0.43% [ ideal 0.70% ]
Permeability 0.9482 md [ ideal > 1md ]
Cleat frequency 4 nos / cm [ 60% mineralised ]
High Langmuir Value 12.6 - 13.8 cc / gm
[ seams highly under-saturated ]
Estimated GIP (Gas-in-Place) 36.40 MCM
[ within 300 - 600m depth range / for 20 sq.km ]