Supplementary Information For Oil And Gas Producing Activities (Tables)

12 Months Ended

Sep. 30, 2020

Supplementary Information For Oil And Gas Producing Activities Unaudited [Abstract]

Capitalized Costs Relating To Oil And Gas Producing Activities

Capitalized Costs Relating to Oil and Gas Producing Activities

	At September 30
	2020		2019
	(Thousands)
Proved Properties(1)	$	6,238,830	$	5,623,623
Unproved Properties	148,075		53,498
	6,386,905		5,677,121
Less — Accumulated Depreciation, Depletion and Amortization	4,628,765		4,012,568
	$	1,758,140	$	1,664,553

(1)Includes asset retirement costs of $132.6 million and $70.5 million at September 30, 2020 and 2019, respectively.

Summary Of Capitalized Costs Of Unproved Properties Excluded From Amortization

Following is a summary of costs excluded from amortization at September 30, 2020:

	Total as of September 30, 2020		Year Costs Incurred
			2020		2019		2018		Prior
	(Thousands)
Acquisition Costs	$	64,218	$	39,953	$	—	$	—	$	24,265
Development Costs	75,138		54,761		17,326		403		2,648
Exploration Costs	7,606		—		—		—		7,606
Capitalized Interest	1,113		969		41		—		103
	$	148,075	$	95,683	$	17,367	$	403	$	34,622

Costs Incurred In Oil And Gas Property Acquisition, Exploration And Development Activities

Costs Incurred in Oil and Gas Property Acquisition, Exploration and Development Activities

	Year Ended September 30
	2020		2019		2018
	(Thousands)
United States
Property Acquisition Costs:
Proved	$	245,976	$	3,136	$	1,544
Unproved	42,922		3,679		4,286
Exploration Costs	3,891		2,060		29,365
Development Costs(1)	355,742		468,498		332,496
Asset Retirement Costs	62,080		26,192		(10,107)
	$	710,611	$	503,565	$	357,584

(1)Amounts for 2020, 2019 and 2018 include capitalized interest of $1.0 million, $0.2 million and $0.3 million, respectively.

Results Of Operations For Producing Activities

Results of Operations for Producing Activities

	Year Ended September 30
	2020		2019		2018
United States	(Thousands, except per Mcfe amounts)
Operating Revenues:
Gas (includes transfers to operations of 1,921, 2,532 and 2,134, respectively)(1)	$	402,447	$	481,048	$	390,642
Oil, Condensate and Other Liquids	107,844		149,078		168,254
Total Operating Revenues(2)	510,291		630,126		558,896
Production/Lifting Costs	203,670		186,626		162,721
Franchise/Ad Valorem Taxes	15,582		17,673		14,355
Purchased Emission Allowance Expense	2,930		2,527		1,883
Accretion Expense	5,237		3,723		4,266
Depreciation, Depletion and Amortization ($0.69, $0.71 and $0.67 per Mcfe of production, respectively)	166,759		149,881		119,946
Impairment of Oil and Gas Producing Properties	449,438		—		—
Income Tax Expense	(92,820)		64,652		72,723
Results of Operations for Producing Activities (excluding corporate overheads and interest charges)	$	(240,505)	$	205,044	$	183,002

(1)There were no revenues from sales to affiliates for all years presented.

(2)Exclusive of hedging gains and losses. See further discussion in Note J — Financial Instruments.

Proved Developed And Undeveloped Oil And Gas Reserve Quantities

	Gas MMcf
	U.S.
	Appalachian Region		West Coast Region	Total Company
Proved Developed and Undeveloped Reserves:
September 30, 2017	1,926,614		46,506	1,973,120
Extensions and Discoveries	521,694	(1)	—	521,694
Revisions of Previous Estimates	90,113		3,322	93,435
Production	(160,499)	(2)	(2,407)	(162,906)
Sale of Minerals in Place	(57,420)		(10,581)	(68,001)
September 30, 2018	2,320,502		36,840	2,357,342
Extensions and Discoveries	686,549	(1)	—	686,549
Revisions of Previous Estimates	104,741		(1,233)	103,508
Production	(195,906)	(2)	(1,974)	(197,880)
September 30, 2019	2,915,886		33,633	2,949,519
Extensions and Discoveries	7,246	(1)	—	7,246
Revisions of Previous Estimates	(85,647)		(2,772)	(88,419)
Production	(225,513)	(2)	(1,889)	(227,402)
Purchases of Minerals in Place	684,141		—	684,141
September 30, 2020	3,296,113		28,972	3,325,085
Proved Developed Reserves:
September 30, 2017	1,316,596		46,506	1,363,102
September 30, 2018	1,569,692		36,840	1,606,532
September 30, 2019	1,901,162		33,633	1,934,795
September 30, 2020	2,744,851		28,972	2,773,823
Proved Undeveloped Reserves:
September 30, 2017	610,018		—	610,018
September 30, 2018	750,810		—	750,810
September 30, 2019	1,014,724		—	1,014,724
September 30, 2020	551,262		—	551,262

(1)Extensions and discoveries include 274 Bcf (during 2018), 175 Bcf (during 2019) and 7 Bcf (during 2020), of Marcellus Shale gas (which exceed 15% of total reserves) in the Appalachian region. Extensions and discoveries include 248 Bcf (during 2018), 512 Bcf (during 2019) and 0 Bcf (during 2020), of Utica Shale gas (which exceed 15% of total reserves) in the Appalachian region.

(2)Production includes 150,196 MMcf (during 2018), 163,015 MMcf (during 2019) and 169,453 MMcf (during 2020), from Marcellus Shale fields. Production includes 9,409 MMcf (during 2018), 32,095 MMcf (during 2019) and 55,392 MMcf (during 2020), from Utica Shale fields.

	Oil Mbbl
	U.S.
	Appalachian Region	West Coast Region	Total Company
Proved Developed and Undeveloped Reserves:
September 30, 2017	28	30,179	30,207
Extensions and Discoveries	—	2,301	2,301
Revisions of Previous Estimates	(10)	2,487	2,477
Production	(4)	(2,531)	(2,535)
Sales of Minerals in Place	—	(4,787)	(4,787)
September 30, 2018	14	27,649	27,663
Extensions and Discoveries	—	787	787
Revisions of Previous Estimates	2	(1,256)	(1,254)
Production	(3)	(2,320)	(2,323)
September 30, 2019	13	24,860	24,873
Extensions and Discoveries	—	288	288
Revisions of Previous Estimates	2	(715)	(713)
Production	(3)	(2,345)	(2,348)
September 30, 2020	12	22,088	22,100
Proved Developed Reserves:
September 30, 2017	28	29,771	29,799
September 30, 2018	14	26,689	26,703
September 30, 2019	13	24,246	24,259
September 30, 2020	12	22,088	22,100
Proved Undeveloped Reserves:
September 30, 2017	—	408	408
September 30, 2018	—	960	960
September 30, 2019	—	614	614
September 30, 2020	—	—	—

Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves

	Year Ended September 30
	2020		2019		2018
	(Thousands)
United States
Future Cash Inflows	$	6,493,362	$	8,738,182	$	7,822,855
Less:
Future Production Costs	3,149,857		2,989,518		2,606,411
Future Development Costs	501,678		797,640		559,707
Future Income Tax Expense at Applicable Statutory Rate	454,553		1,159,882		1,125,910
Future Net Cash Flows	2,387,274		3,791,142		3,530,827
Less:
10% Annual Discount for Estimated Timing of Cash Flows	1,164,804		2,054,823		1,810,522
Standardized Measure of Discounted Future Net Cash Flows	$	1,222,470	$	1,736,319	$	1,720,305

Principal Sources Of Change In The Standardized Measure Of Discounted Future Net Cash Flows

The principal sources of change in the standardized measure of discounted future net cash flows were as follows:

	Year Ended September 30
	2020		2019		2018
	(Thousands)
United States
Standardized Measure of Discounted Future
Net Cash Flows at Beginning of Year	$	1,736,319	$	1,720,305	$	1,113,046
Sales, Net of Production Costs	(290,975)		(425,773)		(381,775)
Net Changes in Prices, Net of Production Costs	(1,109,101)		(164,428)		541,021
Extensions and Discoveries	4,236		202,683		212,494
Changes in Estimated Future Development Costs	99,884		(69,254)		(43,771)
Purchases of Minerals in Place	170,363		—		—
Sales of Minerals in Place	—		—		(100,816)
Previously Estimated Development Costs Incurred	219,938		245,964		182,348
Net Change in Income Taxes at Applicable Statutory Rate	248,182		21,370		55,558
Revisions of Previous Quantity Estimates	(28,337)		53,777		61,363
Accretion of Discount and Other	171,961		151,675		80,837
Standardized Measure of Discounted Future Net Cash Flows at End of Year	$	1,222,470	$	1,736,319	$	1,720,305