XML 141 R53.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Supplemental Oil and Gas Information (Tables)
 12 Months Ended
Dec. 31, 2019
Reserve Quantities [Line Items]  
Summary of Proved Reserves Based on Average Prices

Equivalents
(Millions of barrels of oil equivalent)
Total
 
United
States
 
Canada
 
Malaysia and Other
Proved developed and undeveloped reserves:
 
 
 
 
 
 
 
December 31, 2016
684.5

 
287.4

 
241.0

 
156.2

Revisions of previous estimates
(5.6
)
 
(5.4
)
 
4.9

 
(5.2
)
Improved recovery
2.0

 
—

 
—

 
2.0

Extensions and discoveries
71.2

 
39.6

 
31.3

 
0.3

Purchases of properties
5.9

 
5.9

 
—

 
—

Production
(59.8
)
 
(22.5
)
 
(18.1
)
 
(19.2
)
December 31, 2017
698.2

 
304.9

 
259.2

 
134.1

Revisions of previous estimates
(21.8
)
 
(14.0
)
 
(18.1
)
 
10.4

Improved recovery
0.9

 
—

 
—

 
0.9

Extensions and discoveries
122.6

 
60.1

 
61.8

 
0.8

Purchases of properties
106.9

 
98.7

 
6.9

 
1.3

Production
(62.8
)
 
(24.0
)
 
(21.1
)
 
(17.7
)
December 31, 2018
844.0

 
425.6

 
288.6

 
129.7

Revisions of previous estimates
28.4

 
(17.9
)
 
46.1

 
0.3

Extensions and discoveries
73.3

 
62.2

 
11.1

 
—

Purchases of properties
76.2

 
76.2

 
—

 
—

Sales of properties
(121.5
)
 
(0.1
)
 
—

 
(121.4
)
Production
(75.4
)
 
(45.9
)
 
(21.7
)
 
(7.8
)
December 31, 2019 ¹
825.0

 
500.1

 
324.1

 
0.8

Proved developed reserves:
 
 
 
 
 
 
 
December 31, 2016
343.5

 
157.8

 
103.3

 
82.4

December 31, 2017
346.7

 
170.9

 
114.1

 
61.7

December 31, 2018
430.2

 
247.0

 
124.2

 
59.1

December 31, 2019 ²
472.3

 
273.4

 
198.1

 
0.8

Proved undeveloped reserves:
 
 
 
 
 
 
 
December 31, 2016
341.1

 
129.6

 
137.7

 
73.8

December 31, 2017
351.5

 
134.0

 
145.1

 
72.4

December 31, 2018
413.8

 
178.7

 
164.5

 
70.7

December 31, 2019 ³
352.7

 
226.7

 
126.0

 
—

1 Includes proved reserves of 24.6 MMBOE, consisting of 22.1 MMBBL oil, 0.9 MMBBL NGLs, and 9.5 BCF natural gas attributable to the noncontrolling interest in MP GOM.
2 Includes proved developed reserves of 19.6 MMBOE, consisting of 17.7 MMBBL oil, 0.7 MMBBL NGLs, and 7.1 BCF natural gas attributable to the noncontrolling interest in MP GOM.
3 Includes proved undeveloped reserves of 5.0 MMBOE, consisting of 4.4 MMBBL oil, 0.2 MMBBL NGLs, and 2.4 BCF natural gas attributable to the noncontrolling interest in MP GOM.
Costs Incurred in Oil and Gas Property Acquisition, Exploration and Development Activities
(Millions of dollars)
United
States
 
Canada
 
Malaysia
 
Other
 
Total
Year ended December 31, 2019
 
 
 
 
 
 
 
 
 
Property acquisition costs
 
 
 
 
 
 
 
 
 
Unproved
$
533.8

 
0.2

 
—

 
13.0

 
547.0

Proved
733.1

 
—

 
—

 
—

 
733.1

Total acquisition costs
1,266.9

 
0.2

 
—

 
13.0

 
1,280.1

Exploration costs 1
44.8

 
6.4

 
—

 
67.4

 
118.6

Development costs 1
979.0

 
281.8

 
—

 
21.6

 
1,282.4

Total costs incurred
2,290.7

 
288.4

 
—

 
102.0

 
2,681.1

Charged to expense
 
 
 
 
 
 
 
 
 
Geophysical and other costs
21.6

 
0.5

 
—

 
32.2

 
54.3

Total charged to expense
21.6

 
0.5

 
—

 
32.2

 
54.3

Property additions
$
2,269.1

 
287.9

 
—

 
69.8

 
2,626.8

Year ended December 31, 2018
 
 
 
 
 
 
 
 
 
Property acquisition costs
 
 
 
 
 
 
 
 
 
Unproved
$
2.8

 
—

 
—

 
0.2

 
3.0

Proved
794.3

 
—

 
—

 
—

 
794.3

Total acquisition costs
797.1

 
—

 
—

 
0.2

 
797.3

Exploration costs 1
88.1

 
0.6

 
2.2

 
35.1

 
126.0

Development costs 1
853.7

 
373.8

 
145.9

 
16.6

 
1,390.0

Total costs incurred
1,738.9

 
374.4

 
148.1

 
51.9

 
2,313.3

Charged to expense
 
 
 
 
 
 
 
 
 
Dry hole expense
16.0

 
—

 
0.1

 
4.5

 
20.6

Geophysical and other costs
13.4

 
0.6

 
2.1

 
31.3

 
47.4

Total charged to expense
29.4

 
0.6

 
2.2

 
35.8

 
68.0

Property additions
$
1,709.5

 
373.8

 
145.9

 
16.1

 
2,245.3

Year ended December 31, 2017
 
 
 
 
 
 
 
 
 
Property acquisition costs
 
 
 
 
 
 
 
 
 
Unproved
$
50.4

 
—

 
—

 
13.0

 
63.4

Proved
7.7

 
—

 
—

 
—

 
7.7

Total acquisition costs
58.1

 
—

 
—

 
13.0

 
71.1

Exploration costs 1
13.7

 
0.6

 
(8.9
)
 
73.8

 
79.2

Development costs 1
508.4

 
273.8

 
35.7

 
1.1

 
819.0

Total costs incurred
580.2

 
274.4

 
26.8

 
87.9

 
969.3

Charged to expense
 
 
 
 
 
 
 
 
 
Dry hole expense
(1.9
)
 
—

 
0.7

 
(3.0
)
 
(4.2
)
Geophysical and other costs
9.7

 
0.5

 
1.7

 
53.3

 
65.2

Total charged to expense
7.8

 
0.5

 
2.4

 
50.3

 
61.0

Property additions
$
572.4

 
273.9

 
24.4

 
37.6

 
908.3






1 Includes noncash asset retirement costs as follows:
2019
 
 
 
 
 
 
 
 
 
Exploration costs
$
—

 
—

 
—

 
—

 
—

Development costs
75.8

 
3.8

 
—

 
—

 
79.6


$
75.8

 
3.8

 
—

 
—

 
79.6

2018
 
 
 
 
 
 
 
 
 
Exploration costs
$
—

 
—

 
—

 
—

 
—

Development costs
366.0

 
—

 
7.3

 
0.2

 
373.5


$
366.0

 
—

 
7.3

 
0.2

 
373.5

2017
 
 
 
 
 
 
 
 
 
Exploration costs
$
—

 
—

 
—

 
—

 
—

Development costs
37.6

 
6.3

 
8.4

 
—

 
52.3


$
37.6

 
6.3

 
8.4

 
—

 
52.3
Results of Operations for Oil andGas Producing Activities
(Millions of dollars)
United
States
 
Canada
 
Other
 
Total
Year ended December 31, 2019
 
 
 
 
 
 
 
Revenues
 

 
 

 
 

 
 

Crude oil and natural gas liquids sales
$
2,285.8

 
287.4

 
11.6

 
2,584.8

Natural gas sales
73.9

 
158.4

 
—

 
232.3

Total oil and natural gas revenues
2,359.7

 
445.8

 
11.6

 
2,817.1

Other operating revenues
7.3

 
1.2

 
—

 
8.5

Total revenues
2,367.0

 
447.0

 
11.6

 
2,825.6

Costs and expenses
 
 
 
 
 
 
 
Lease operating expenses
461.5

 
142.4

 
1.3

 
605.2

Severance and ad valorem taxes
46.6

 
1.4

 
—

 
48.0

Transportation, gathering and processing
140.8

 
35.5

 
—

 
176.3

Exploration costs charged to expense
21.4

 
0.6

 
45.3

 
67.3

Undeveloped lease amortization
23.1

 
1.3

 
3.6

 
28.0

Depreciation, depletion and amortization
878.7

 
243.0

 
3.5

 
1,125.2

Accretion of asset retirement obligations
34.4

 
6.1

 
—

 
40.5

Selling and general expenses
74.3

 
30.0

 
22.5

 
126.8

Other expenses (benefits)
52.2

 
(6.1
)
 
1.3

 
47.4

Total costs and expenses
1,733.0

 
454.2

 
77.5

 
2,264.7

Results of operations before taxes
634.0

 
(7.2
)
 
(65.9
)
 
560.9

Income tax expense (benefit)
115.6

 
(2.9
)
 
(12.4
)
 
100.3

Results of operations
$
518.4

 
(4.3
)
 
(53.5
)
 
460.6

Year ended December 31, 2018
 
 
 
 
 
 
 
Revenues
 
 
 
 
 
 
 
Crude oil and natural gas liquids sales
$
1,277.7

 
302.8

 
6.1

 
1,586.6

Natural gas sales
53.6

 
166.3

 
—

 
219.9

Total oil and natural gas revenues
1,331.3

 
469.1

 
6.1

 
1,806.5

Other operating revenues
1.4

 
1.4

 
16.1

 
18.9

Total revenues
1,332.7

 
470.5

 
22.2

 
1,825.4

Costs and expenses
 
 
 
 
 
 
 
Lease operating expenses
230.5

 
122.6

 
0.7

 
353.8

Severance and ad valorem taxes
50.9

 
1.2

 
—

 
52.1

Transportation, gathering and processing
43.1

 
31.9

 
—

 
75.0

Exploration costs charged to expense
29.4

 
0.6

 
31.6

 
61.6

Undeveloped lease amortization
36.8

 
0.8

 
2.5

 
40.1

Depreciation, depletion and amortization
519.5

 
232.4

 
3.5

 
755.4

Accretion of asset retirement obligations
19.5

 
7.7

 
—

 
27.2

Impairment of assets
20.0

 
—

 
—

 
20.0

Selling and general expenses
49.0

 
26.8

 
23.5

 
99.3

Other expenses
23.0

 
(19.1
)
 
2.3

 
6.2

Total costs and expenses
1,021.7

 
404.9

 
64.1

 
1,490.7

Results of operations before taxes
311.0

 
65.6

 
(41.9
)
 
334.7

Income tax expense (benefit)
68.1

 
14.5

 
(25.3
)
 
57.3

Results of operations
$
242.9

 
51.1

 
(16.6
)
 
277.4

1 Results exclude corporate overhead, interest and discontinued operations. 2019 and 2018 include noncontrolling interest in MP GOM.
໿
(Millions of dollars)
United
States
 
Canada
 
Other
 
Total
Year ended December 31, 2017
 
 
 
 
 
 
 
Revenues
 
 
 
 
 
 
 
Crude oil and natural gas liquids sales
$
903.7

 
203.7

 
—

 
1,107.4

Natural gas sales
37.9

 
155.1

 
—

 
193.0

Total oil and natural gas revenues
941.6

 
358.8

 
—

 
1,300.4

Other operating revenues
2.7

 
126.7

 
—

 
129.4

Total revenues
944.3

 
485.5

 
—

 
1,429.8

Costs and expenses
 
 
 
 
 
 
 
Lease operating expenses
198.5

 
101.1

 
—

 
299.6

Severance and ad valorem taxes
42.2

 
1.5

 
—

 
43.7

Exploration costs charged to expense
7.8

 
0.5

 
50.3

 
58.6

Undeveloped lease amortization
60.2

 
1.6

 
—

 
61.8

Depreciation, depletion and amortization
546.1

 
185.4

 
3.8

 
735.3

Accretion of asset retirement obligations
17.4

 
7.9

 
—

 
25.3

Selling and general expenses
61.8

 
28.3

 
19.6

 
109.7

Other expenses
20.0

 
2.3

 
73.7

 
96.0

Total costs and expenses
954.0

 
328.6

 
73.7

 
1,356.3

Results of operations before taxes
(9.7
)
 
156.9

 
(73.7
)
 
73.5

Income tax expense (benefit)
(0.8
)
 
44.4

 
(36.2
)
 
7.4

Results of operations
$
(8.9
)
 
112.5

 
(37.5
)
 
66.1

1 Results exclude corporate overhead, interest and discontinued operations.
Standardized Measure of Discounted Future Net Cash Flow Relating to Proved Oil and Gas Reserves
(Millions of dollars)
United
States
 
Canada
 
Malaysia & Other
 
Total
December 31, 2019
 

 
 

 
 

 
 

Future cash inflows
$
23,565.6

 
4,912.1

 
55.7

 
28,533.4

Future development costs
(4,137.8
)
 
(723.7
)
 
(0.3
)
 
(4,861.8
)
Future production costs
(8,986.2
)
 
(2,549.9
)
 
(29.9
)
 
(11,566.0
)
Future income taxes
(1,709.3
)
 
(414.5
)
 
(14.1
)
 
(2,137.9
)
Future net cash flows
8,732.3

 
1,224.0

 
11.4

 
9,967.7

10% annual discount for estimated timing of cash flows
(3,633.1
)
 
(504.0
)
 
(3.0
)
 
(4,140.1
)
Standardized measure of discounted future net cash flows
$
5,099.2

 
720.0

 
8.4

 
5,827.6

December 31, 2018
 
 
 
 
 
 
 
Future cash inflows
$
23,473.9

 
5,437.5

 
5,511.6

 
34,423.0

Future development costs
(3,279.1
)
 
(1,362.7
)
 
(517.4
)
 
(5,159.2
)
Future production costs
(7,279.5
)
 
(2,693.0
)
 
(2,813.4
)
 
(12,785.9
)
Future income taxes
(2,216.5
)
 
(236.4
)
 
(472.0
)
 
(2,924.9
)
Future net cash flows
10,698.8

 
1,145.4

 
1,708.8

 
13,553.0

10% annual discount for estimated timing of cash flows
(4,295.4
)
 
(531.4
)
 
(446.3
)
 
(5,273.1
)
Standardized measure of discounted future net cash flows
$
6,403.4

 
614.0

 
1,262.5

 
8,279.9

December 31, 2017
 
 
 
 
 
 
 
Future cash inflows
$
12,885.8

 
4,714.3

 
4,392.0

 
21,992.1

Future development costs
(2,079.5
)
 
(1,081.7
)
 
(632.3
)
 
(3,793.5
)
Future production costs
(4,765.3
)
 
(2,507.4
)
 
(2,305.0
)
 
(9,577.7
)
Future income taxes
(893.7
)
 
(161.1
)
 
(232.2
)
 
(1,287.0
)
Future net cash flows
5,147.3

 
964.1

 
1,222.5

 
7,333.9

10% annual discount for estimated timing of cash flows
(2,698.2
)
 
(394.6
)
 
(318.2
)
 
(3,411.0
)
Standardized measure of discounted future net cash flows
$
2,449.1

 
569.5

 
904.3

 
3,922.9

1  2019 and 2018 include noncontrolling interest in MP GOM.
Principal Sources of Change in the Standardized Measure of Discounted Future Net Cash Flows
(Millions of dollars)
2019
 
2018
 
2017
Net changes in prices and production costs 2
(2,993.9
)
 
2,972.6

 
2,428.4

Net changes in development costs
(675.7
)
 
(1,891.1
)
 
(724.4
)
Sales and transfers of oil and natural gas produced, net of production costs
(2,163.8
)
 
(1,978.6
)
 
(1,576.0
)
Net change due to extensions and discoveries
1,221.9

 
1,930.3

 
807.9

Net change due to purchases and sales of proved reserves
(628.1
)
 
3,152.4

 
85.9

Development costs incurred 
1,282.4

 
1,017.3

 
802.7

Accretion of discount
1,002.0

 
469.5

 
270.9

Revisions of previous quantity estimates
(71.2
)
 
(347.8
)
 
(109.5
)
Net change in income taxes
574.1

 
(967.6
)
 
(643.0
)
Net increase (decrease)
(2,452.3
)
 
4,357.0

 
1,342.9

Standardized measure at January 1
8,279.9

 
3,922.9

 
2,580.0

Standardized measure at December 31
5,827.6

 
8,279.9

 
3,922.9
Capitalized Costs Relating to Oil and Gas Producing Activities
(Millions of dollars)
United
States
 
Canada
 
Other
 
Total
December 31, 2019
 
 
 
 
 
 
 
Unproved oil and natural gas properties
$
1,116.6

 
243.7

 
210.4

 
1,570.7

Proved oil and natural gas properties
13,292.6

 
4,176.7

 
21.1

 
17,490.4

Gross capitalized costs
14,409.2

 
4,420.4

 
231.5

 
19,061.1

Accumulated depreciation, depletion and amortization
 
 
 
 
 
 
 
Unproved oil and natural gas properties
(136.4
)
 
(225.4
)
 
(25.9
)
 
(387.7
)
Proved oil and natural gas properties
(6,298.9
)
 
(2,438.6
)
 
(2.4
)
 
(8,739.9
)
Net capitalized costs
$
7,973.9

 
1,756.4

 
203.2

 
9,933.5

December 31, 2018
 
 
 
 
 
 
 
Unproved oil and natural gas properties
$
394.2

 
250.0

 
176.9

 
821.1

Proved oil and natural gas properties
11,678.3

 
3,693.0

 
—

 
15,371.3

Gross capitalized costs
12,072.5

 
3,943.0

 
176.9

 
16,192.4

Accumulated depreciation, depletion and amortization
 
 
 
 
 
 
 
Unproved oil and natural gas properties
(129.3
)
 
(213.5
)
 
(25.4
)
 
(368.2
)
Proved oil and natural gas properties
(5,433.7
)
 
(2,088.8
)
 
—

 
(7,522.5
)
Net capitalized costs
$
6,509.5

 
1,640.7

 
151.5

 
8,301.7
Net natural gas liquids revenue  
Reserve Quantities [Line Items]  
Summary of Proved Reserves Based on Average Prices
(Millions of barrels)
Total
 
United
States
 
Canada
 
Malaysia and Other
Proved developed and undeveloped NGL reserves:
 
 
 
 
 
 
 
December 31, 2016
42.5

 
36.4

 
5.6

 
0.5

Revisions of previous estimates
1.3

 
2.0

 
(0.6
)
 
(0.1
)
Extensions and discoveries
7.8

 
7.0

 
0.8

 
—

Purchase of properties
0.5

 
0.5

 
—

 
—

Production
(3.2
)
 
(2.9
)
 
(0.2
)
 
(0.1
)
December 31, 2017
48.9

 
43.0

 
5.6

 
0.3

Revisions of previous estimates
(6.2
)
 
(5.3
)
 
(1.6
)
 
0.7

Extensions and discoveries
12.0

 
9.7

 
2.3

 
—

Purchases of properties
3.0

 
3.0

 
—

 
—

Production
(3.5
)
 
(2.8
)
 
(0.4
)
 
(0.3
)
December 31, 2018
54.2

 
47.6

 
5.9

 
0.7

Revisions of previous estimates
(5.0
)
 
(2.5
)
 
(2.5
)
 
—

Extensions and discoveries
6.8

 
6.4

 
0.4

 
—

Purchases of properties
5.2

 
5.2

 
—

 
—

Sales of properties
(0.6
)
 
—

 
—

 
(0.6
)
Production
(4.5
)
 
(3.9
)
 
(0.5
)
 
(0.1
)
December 31, 2019 ¹
56.1

 
52.8

 
3.3

 
—

Proved developed NGL reserves:
 
 
 
 
 
 
 
December 31, 2016
22.2

 
20.8

 
0.9

 
0.5

December 31, 2017
24.6

 
23.3

 
1.0

 
0.3

December 31, 2018
27.3

 
24.9

 
1.7

 
0.7

December 31, 2019 ²
28.1

 
26.2

 
1.9

 
—

Proved undeveloped NGL reserves:
 
 
 
 
 
 
 
December 31, 2016
20.3

 
15.6

 
4.7

 
—

December 31, 2017
24.3

 
19.7

 
4.6

 
—

December 31, 2018
26.9

 
22.7

 
4.2

 
—

December 31, 2019 ³
28.0

 
26.6

 
1.4

 
—

1 Includes total proved reserves of 0.9 MMBBL for Total and United States attributable to the noncontrolling interest in MP GOM.
2 Includes proved developed reserves of 0.7 MMBBL for Total and United States attributable to the noncontrolling interest in MP GOM.
3 Includes proved undeveloped reserves of 0.2 MMBBL for Total and United States attributable to the noncontrolling interest in MP GOM.
Net crude oil and condensate revenue  
Reserve Quantities [Line Items]  
Summary of Proved Reserves Based on Average Prices
(Millions of barrels)
Total
 
United
States
 
Canada
 
Malaysia and Other
Proved developed and undeveloped crude oil reserves:
 
 
 
 
 
 
 
December 31, 2016
329.0

 
214.4

 
48.9

 
65.7

Revisions of previous estimates
(6.0
)
 
(4.7
)
 
2.3

 
(3.6
)
Improved recovery
2.0

 
—

 
—

 
2.0

Extensions and discoveries
31.6

 
27.2

 
4.4

 
—

Purchases of properties
4.7

 
4.7

 
—

 
—

Production
(33.2
)
 
(16.9
)
 
(4.1
)
 
(12.2
)
December 31, 2017
328.1

 
224.7

 
51.5

 
51.9

Revisions of previous estimates
(15.3
)
 
(15.0
)
 
(8.0
)
 
7.7

Improved recovery
0.8

 
—

 
—

 
0.8

Extensions and discoveries
58.9

 
42.9

 
16.0

 
—

Purchases of properties
93.6

 
92.3

 
—

 
1.3

Production
(33.6
)
 
(18.4
)
 
(4.5
)
 
(10.7
)
December 31, 2018
432.5

 
326.5

 
55.0

 
51.0

Revisions of previous estimates
(31.0
)
 
(17.1
)
 
(14.0
)
 
0.1

Extensions and discoveries
58.2

 
49.2

 
9.0

 
—

Purchases of properties
56.3

 
56.3

 
—

 
—

Sales of properties
(45.8
)
 
(0.1
)
 
—

 
(45.7
)
Production
(46.3
)
 
(37.0
)
 
(4.7
)
 
(4.6
)
December 31, 2019 ¹
423.9

 
377.8

 
45.3

 
0.8

Proved developed crude oil reserves:
 
 
 
 
 
 
 
December 31, 2016
184.9

 
113.9

 
19.2

 
51.8

December 31, 2017
185.5

 
126.3

 
21.9

 
37.3

December 31, 2018
249.3

 
189.0

 
23.3

 
37.0

December 31, 2019 ²
230.9

 
205.0

 
25.1

 
0.8

Proved undeveloped crude oil reserves:
 
 
 
 
 
 
 
December 31, 2016
144.1

 
100.5

 
29.7

 
13.9

December 31, 2017
142.6

 
98.4

 
29.6

 
14.6

December 31, 2018
183.2

 
137.5

 
31.7

 
14.0

December 31, 2019 ³
193.0

 
172.8

 
20.2

 
—

1 Includes total proved reserves of 22.1 MMBO for Total and United States attributable to the noncontrolling interest in MP GOM.
2 Includes proved developed reserves of 17.7 MMBO for Total and United States attributable to the noncontrolling interest in MP GOM.
3 Includes proved undeveloped reserves of 4.4 MMBO for Total and United States attributable to the noncontrolling interest in MP GOM.
Net natural gas revenue  
Reserve Quantities [Line Items]  
Summary of Proved Reserves Based on Average Prices
(Billions of cubic feet)
Total
 
United
States
 
Canada
 
Malaysia and Other
Proved developed and undeveloped natural gas reserves:
 
 
 
 
 
 
 
December 31, 2016
1,878.0

 
219.4

 
1,118.9

 
539.7

Revisions of previous estimates
(5.4
)
 
(16.0
)
 
19.4

 
(8.8
)
Extensions and discoveries
190.6

 
32.2

 
156.7

 
1.7

Purchases of properties
4.0

 
4.0

 
—

 
—

Production
(140.1
)
 
(16.3
)
 
(82.6
)
 
(41.2
)
December 31, 2017
1,927.1

 
223.3

 
1,212.4

 
491.4

Revisions of previous estimates
(1.8
)
 
37.6

 
(51.2
)
 
11.8

Improved recovery
0.6

 
—

 
—

 
0.6

Extensions and discoveries
310.3

 
44.7

 
261.0

 
4.6

Purchases of properties
61.7

 
20.3

 
41.4

 
—

Production
(154.3
)
 
(16.9
)
 
(97.2
)
 
(40.2
)
December 31, 2018
2,143.6

 
309.0

 
1,366.4

 
468.2

Revisions of previous estimates
386.5

 
10.3

 
375.3

 
0.9

Extensions and discoveries
49.8

 
39.5

 
10.3

 
—

Purchases of properties
88.3

 
88.3

 
—

 
—

Sales of properties
(450.7
)
 
(0.1
)
 
—

 
(450.6
)
Production
(147.8
)
 
(30.2
)
 
(99.1
)
 
(18.5
)
December 31, 2019 ¹
2,069.7

 
416.8

 
1,652.9

 
—

Proved developed natural gas reserves:
 
 
 
 
 
 
 
December 31, 2016
818.1

 
138.7

 
498.9

 
180.5

December 31, 2017
819.3

 
127.7

 
547.0

 
144.6

December 31, 2018
921.6

 
198.3

 
595.0

 
128.3

December 31, 2019 ²
1,279.8

 
253.1

 
1,026.7

 
—

Proved undeveloped natural gas reserves:
 
 
 
 
 
 
 
December 31, 2016
1,059.9

 
80.7

 
620.0

 
359.2

December 31, 2017
1,107.8

 
95.6

 
665.5

 
346.7

December 31, 2018
1,222.0

 
110.7

 
771.4

 
339.9

December 31, 2019 ³
789.9

 
163.7

 
626.2

 
—

1 Includes total proved reserves of 9.5 BCF for Total and United States attributable to the noncontrolling interest in MP GOM.
2 Includes proved developed reserves of 7.1 BCF for Total and United States attributable to the noncontrolling interest in MP GOM.
3 Includes proved undeveloped reserves of 2.4 BCF for Total and United States attributable to the noncontrolling interest in MP GOM.