Supplementary Information For Oil And Gas Producing Activities (Tables)

12 Months Ended

Sep. 30, 2021

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
	2021		2020
	(Thousands)
Proved Properties(1)	$	6,652,341	$	6,238,830
Unproved Properties	103,759		148,075
	6,756,100		6,386,905
Less — Accumulated Depreciation, Depletion and Amortization	4,881,972		4,628,765
	$	1,874,128	$	1,758,140

(1)Includes asset retirement costs of $152.8 million and $132.6 million at September 30, 2021 and 2020, respectively.

Summary Of Capitalized Costs Of Unproved Properties Excluded From Amortization

Following is a summary of costs excluded from amortization at September 30, 2021:

	Total as of September 30, 2021		Year Costs Incurred
			2021		2020		2019		Prior
	(Thousands)
Acquisition Costs	$	57,027	$	—	$	32,762	$	—	$	24,265
Development Costs	37,574		14,979		2,430		17,114		3,051
Exploration Costs	8,178		572		—		—		7,606
Capitalized Interest	980		340		496		41		103
	$	103,759	$	15,891	$	35,688	$	17,155	$	35,025

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
	2021		2020		2019
	(Thousands)
United States
Property Acquisition Costs:
Proved	$	1,801	$	245,976	$	3,136
Unproved	5,102		42,922		3,679
Exploration Costs(1)	15,413		3,891		2,060
Development Costs(2)	329,368		355,742		468,498
Asset Retirement Costs	20,194		62,080		26,192
	$	371,878	$	710,611	$	503,565

(1)Amounts for 2021, 2020 and 2019 include capitalized interest of $0.1 million, zero and zero, respectively.

(2)Amounts for 2021, 2020 and 2019 include capitalized interest of $0.4 million, $1.0 million and $0.2 million, respectively.

Results Of Operations For Producing Activities

Results of Operations for Producing Activities

	Year Ended September 30
	2021		2020		2019
United States	(Thousands, except per Mcfe amounts)
Operating Revenues:
Gas (includes transfers to operations of $3,061, $1,921 and $2,532, respectively)(1)	$	780,477	$	402,447	$	481,048
Oil, Condensate and Other Liquids	135,191		107,844		149,078
Total Operating Revenues(2)	915,668		510,291		630,126
Production/Lifting Costs	267,316		203,670		186,626
Franchise/Ad Valorem Taxes	22,128		15,582		17,673
Purchased Emission Allowance Expense	2,940		2,930		2,527
Accretion Expense	7,743		5,237		3,723
Depreciation, Depletion and Amortization ($0.54, $0.69 and $0.71 per Mcfe of production, respectively)	177,055		166,759		149,881
Impairment of Oil and Gas Producing Properties	76,152		449,438		—
Income Tax Expense	98,593		(92,820)		64,652
Results of Operations for Producing Activities (excluding corporate overheads and interest charges)	$	263,741	$	(240,505)	$	205,044

(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, 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
Extensions and Discoveries	689,395	(1)	—	689,395
Revisions of Previous Estimates	19,940		3,033	22,973
Production	(312,300)	(2)	(1,720)	(314,020)
September 30, 2021	3,693,148		30,285	3,723,433
Proved Developed Reserves:
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
September 30, 2021	3,061,178		30,285	3,091,463
Proved Undeveloped Reserves:
September 30, 2018	750,810		—	750,810
September 30, 2019	1,014,724		—	1,014,724
September 30, 2020	551,262		—	551,262
September 30, 2021	631,970		—	631,970

(1)Extensions and discoveries include 175 Bcf (during 2019), 7 Bcf (during 2020) and 180 Bcf (during 2021), of Marcellus Shale gas (which exceed 15% of total reserves) in the Appalachian region. Extensions and discoveries include 512 Bcf (during 2019), 0 Bcf (during 2020) and 497 Bcf (during 2021), of Utica Shale gas (which exceed 15% of total reserves) in the Appalachian region.

(2)Production includes 163,015 MMcf (during 2019), 169,453 MMcf (during 2020) and 218,016 MMcf (during 2021), from Marcellus Shale fields. Production includes 32,095 MMcf (during 2019), 55,392 MMcf (during 2020) and 93,253 MMcf (during 2021), from Utica Shale fields.

	Oil Mbbl
	U.S.
	Appalachian Region	West Coast Region	Total Company
Proved Developed and Undeveloped Reserves:
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
Extensions and Discoveries	—	1,041	1,041
Revisions of Previous Estimates	1	630	631
Production	(2)	(2,233)	(2,235)
September 30, 2021	11	21,526	21,537
Proved Developed Reserves:
September 30, 2018	14	26,689	26,703
September 30, 2019	13	24,246	24,259
September 30, 2020	12	22,088	22,100
September 30, 2021	11	20,930	20,941
Proved Undeveloped Reserves:
September 30, 2018	—	960	960
September 30, 2019	—	614	614
September 30, 2020	—	—	—
September 30, 2021	—	596	596

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

	Year Ended September 30
	2021		2020		2019
	(Thousands)
United States
Future Cash Inflows	$	10,175,182	$	6,493,362	$	8,738,182
Less:
Future Production Costs	3,423,629		3,149,857		2,989,518
Future Development Costs	597,662		501,678		797,640
Future Income Tax Expense at Applicable Statutory Rate	1,397,175		454,553		1,159,882
Future Net Cash Flows	4,756,716		2,387,274		3,791,142
Less:
10% Annual Discount for Estimated Timing of Cash Flows	2,403,144		1,164,804		2,054,823
Standardized Measure of Discounted Future Net Cash Flows	$	2,353,572	$	1,222,470	$	1,736,319

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
	2021		2020		2019
	(Thousands)
United States
Standardized Measure of Discounted Future
Net Cash Flows at Beginning of Year	$	1,222,470	$	1,736,319	$	1,720,305
Sales, Net of Production Costs	(626,132)		(290,975)		(425,773)
Net Changes in Prices, Net of Production Costs	1,478,995		(1,109,101)		(164,428)
Extensions and Discoveries	462,040		4,236		202,683
Changes in Estimated Future Development Costs	48,247		99,884		(69,254)
Purchases of Minerals in Place	—		170,363		—
Sales of Minerals in Place	—		—		—
Previously Estimated Development Costs Incurred	81,239		219,938		245,964
Net Change in Income Taxes at Applicable Statutory Rate	(415,993)		248,182		21,370
Revisions of Previous Quantity Estimates	(52,383)		(28,337)		53,777
Accretion of Discount and Other	155,089		171,961		151,675
Standardized Measure of Discounted Future Net Cash Flows at End of Year	$	2,353,572	$	1,222,470	$	1,736,319