For the Three Months Ended September 30, 2022 Compared to the Three Months Ended September 30, 2021
Net income of $47.2 million and a net loss of $13.5 million were recorded for the three months ended September 30, 2022 and 2021, respectively.
Oil, natural gas and NGL revenues were $112.8 million and $96.8 million for the three months ended September 30, 2022 and 2021, respectively. Average net production volumes were approximately 21.0 MBoe/d and 25.1 MBoe/d for the three months ended September 30, 2022 and 2021, respectively. The change in production volumes was primarily due to the suspension of operations at our Beta properties and natural declines. For the three months ended September 30, 2021, production from our Beta properties was 3.7 MBoe/d. The average realized sales price was $58.31 per Boe and $41.89 per Boe for the three months ended September 30, 2022 and 2021, respectively. The increase in average realized sales price was primarily due to the increase in commodity prices.
Other revenues were $13.5 million and $0.2 million for the three months ended September 30, 2022 and 2021, respectively. For the three months ended September 30, 2022, we recognized $13.3 million of LOPI proceeds related to the suspension of operations at our Beta properties resulting from the Incident which includes three months of LOPI.
Lease operating expense was $32.0 million and $34.5 million for the three months ended September 30, 2022 and 2021, respectively. The change in lease operating expense was primarily related to a decrease of $5.4 million at our Beta properties, mainly due to the suspension of operations, offset by an increase of $2.9 million related to inflation across our other assets. On a per Boe basis, lease operating expense was $16.56 and $14.92 for the three months ended September 30, 2022 and 2021, respectively. The change in lease operating expense on a per Boe basis was mainly due to the higher aggregate costs noted above and lower production.
Gathering, processing and transportation was $7.5 million and $5.0 million for the three months ended September 30, 2022 and 2021, respectively. The increase was primarily attributable to marketing our own natural gas in Oklahoma starting in October 2021. Marketing our own natural gas in Oklahoma has greatly improved our natural gas differentials, but we must now recognize certain revenue deductions as gathering, processing and transportation expenses on a go-forward basis. On a per Boe basis, gathering, processing and transportation was $3.87 and $2.18 for the three months ended September 30, 2022 and 2021, respectively. The change on a per BOE basis is primarily related to the marketing changes discussed above.
Taxes other than income were $9.2 million and $6.0 million for the three months ended September 30, 2022 and 2021, respectively. The increase in taxes other than income is due to an increase in production taxes as a result of the increase in commodity prices. On a per Boe basis, taxes other than income were $4.73 and $2.61 for the three months ended September 30, 2022 and 2021, respectively. The change in taxes other than income on a per Boe basis was primarily due to the increase in commodity prices.
Depreciation, depletion & amortization (“DD&A expense”) was $6.3 million and $7.0 million for the three months ended September 30, 2022 and 2021, respectively. The change in DD&A expense was primarily due to a decrease in production of 376 MBoe, which equates to a decrease of approximately $1.1 million offset by an increase of $0.4 million in our depletion rate.
General and administrative expense was $7.0 million and $6.4 million for the three months ended September 30, 2022 and 2021, respectively. The change in general and administrative expense was primarily related to an increase of $0.5 million in salaries and other payroll benefits and an increase of $0.2 million in stock compensation expense offset with a decrease of $0.1 million in legal expense.
Net gain on commodity derivative instruments of $3.3 million were recognized for the three months ended September 30, 2022, consisting of a $44.1 million increase in the fair value of open positions and $40.8 million of cash settlements paid on expired positions. Net loss on commodity derivative instruments of $46.7 million was recognized for the three months ended September 30, 2021, consisting of a $24.1 million decrease in the fair value of open positions and $22.6 million of cash settlements paid on expired positions. The change in commodity derivative instruments is primarily related to the rolling off of out-of-the-money commodity hedges and increased commodity prices.
Pipeline incident loss was $2.6 million for the three months ended September 30, 2022. The $2.6 million reflects certain legal expenses that are not expected to be recovered under an insurance policy. No expense was recorded for the three months ended September 30, 2021. See Note 16 of the Notes to Unaudited Condensed Consolidated Financial Statements included under “Item 1. Financial Statements” of this quarterly report for additional information.