Sasol Form 20-F for the year ended 30 June 2021 - Book - Page 56
reserve estimations are set out in table 1 that follows.
Reported reserves will be converted into synthetic oil
reserves, except for reserves which will be used for
utilities in Secunda operations and the majority of the
Twistdraai Thubelisha reserves which will be exported.
The reserve disclosure in this section includes our
Mining segment’s total coal resources and reserves
available for mining operations in Secunda. These
reserves have not been adjusted for the synthetic oil
reserves reported in the supplemental oil and gas
information. The different reserve areas are depicted on
the map on page M-1, as well as whether a specific
reserve area has been assigned to a specific mine.
The other potential coal seam is:
the Number 2 Coal Seam at Shondoni
colliery and Impumelelo colliery, which
has been included in our reserve base.
Reserve estimation (remaining reserves at
31 March 2021)
We have approximately 4,0 billion tons (Bt)
(2020—4,0 Bt) of gross in situ proved and probable
coal reserves in the Secunda Deposit and approximately
1,2 Bt (2020—1,3 Bt) of recoverable reserves. The coal
Table 1.
Coal reserve estimations(1) as at 31 March 2021, in the Secunda area where we have converted mining rights
(signed on 29 March 2010) in terms of the Mineral and Petroleum Resources Development Act, Act 28 of 2002.
Reserve area
Shondoni colliery, number 4 seam . . . . .
Shondoni colliery, number 2 seam . . . . .
Bosjesspruit colliery . . . . . . . . . . . . . . . .
Bosjesspruit colliery . . . . . . . . . . . . . . . .
Syferfontein colliery . . . . . . . . . . . . . . . .
Alexander Block . . . . . . . . . . . . . . . . . . .
Alexander Block . . . . . . . . . . . . . . . . . . .
Twistdraai Thubelisha colliery . . . . . . . .
Impumelelo, Block 2, number 4 seam . .
Impumelelo, Block 2, number 2 seam . .
Block 2 South, number 4 seam . . . . . . . .
Block 2 South, number 2 seam . . . . . . . .
Block 3 South . . . . . . . . . . . . . . . . . . . . .
Total Secunda area . . . . . . . . . . . . . . . .
Gross in
situ coal Geological
resource(2) discount
(Mt)(5)
(Mt)(5)
552
61
170
42
380
498
—
619
612
383
363
133
141
3 954
76
12
9
2
62
100
—
120
92
58
98
36
38
Mine
layout
losses
(Mt)(5)
Extraction
rate
(%)
119
6
79
9
61
74
—
104
115
172
49
18
19
48
41
53
45
58
46
—
55
52
37
54
54
57
Recoverable
reserves(3)
(Mt)(5)
187
19
49
12
136
107
16
243
213
44
123
45
52
1 246
Beneficiated
yield(4)
(%)
Proved/
probable
100
100
100
100
100
100
100
P34,S37
100
100
100
100
100
Proved
Probable
Proved
Probable
Proved
Proved
Probable
Proved
Proved
Probable
Probable
Probable
Probable
(1)
The coal reserve estimations in this table were compiled under supervision of Mr. Viren Deonarain who is considered a Competent Person.
The “South African Code for Reporting of Minerals Resources and Minerals Reserves (The SAMREC Code 2007 edition)” dealing with
competence and responsibility, paragraph 7, states Documentation detailing Exploration Results, Mineral Resources and Mineral reserves
from which a Public Report is prepared, must be prepared by, or under the direction of, and signed by a Competent Person. Paragraph 9
states: A ‘Competent Person’ is a person who is registered with SACNASP, ECSA or PLATO, or is a Member or Fellow of the SAIMM,
the GSS or a Recognised Overseas Professional organisation. The Competent Person must comply with the provisions of the relevant
promulgated Acts. Ms. L Jeffrey and Mr. N McGeorge, on behalf of SRK Consulting performed a comprehensive and independent audit of
the coal resource/reserve estimations in February 2019 and the estimates were certified as correct. The latest coal resource/reserve
estimations were determined by following the same process. The estimation of the proved reserves is compliant with the definition and
guidelines as stated in SEC Industry Guideline 7.
(2)
The gross in situ coal resource is an estimate of the coal tonnage, contained in the full coal seam above the minimum thickness cut off and
relevant coal quality cut off parameters. No loss factors are applied and seam height does not include external dilution or contamination
material.
(3)
The recoverable coal reserve is an estimate of the expected recovery of the mines in these areas and is determined by the subtraction of
losses due to geological and mining factors and the addition of dilatants such as moisture and contamination.
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