was primarily related to marketing and other deductions associated with the LongPoint Acquisition, partially offset by the decrease in prices received for oil and natural gas production.
General and Administrative Expenses
General and administrative expenses for the three months ended September 30, 2024 were $9.5 million, a decrease of $0.9 million compared to $10.4 million for the three months ended September 30, 2023. The decrease in general and administrative expenses was primarily attributable to expenses related to a one-time cash bonus paid to employees during the three months ended September 30, 2023.
Interest Expense
Interest expense for the three months ended September 30, 2024 remained relatively flat at $6.5 million compared to $6.7 million for the three months ended September 30, 2023.
Income Tax Expense
We recorded an income tax expense of $1.9 million and $0.1 million for the three months ended September 30, 2024 and 2023, respectively.
Comparison of the Nine Months Ended September 30, 2024 to the Nine Months Ended September 30, 2023
Oil, Natural Gas and NGL Revenues
For the nine months ended September 30, 2024, our oil, natural gas and NGL revenues were $235.5 million, an increase of $51.9 million from $183.6 million for the nine months ended September 30, 2023. The increase in oil, natural gas and NGL revenues was primarily related to an increase in production volumes for the nine months ended September 30, 2024 as discussed below.
Our revenues are a function of oil, natural gas and NGL production volumes sold and average prices received for those volumes. The production volumes were 6,886,189 Boe or 25,132 Boe/d, for the nine months ended September 30, 2024, an increase of 1,835,159 Boe or 6,609 Boe/d, from 5,051,030 Boe or 18,523 Boe/d, for the nine months ended September 30, 2023. The increase in production for the nine months ended September 30, 2024 was primarily attributable to production associated with the MB Minerals Acquisition and the LongPoint Acquisition.
Our operators received an average of $77.24 per Bbl of oil, $1.89 per Mcf of natural gas and $23.68 per Bbl of NGL for the volumes sold during the nine months ended September 30, 2024 compared to $76.17 per Bbl of oil, $2.66 per Mcf of natural gas and $23.67 per Bbl of NGL for the volumes sold during the nine months ended September 30, 2023. These average prices received during the nine months ended September 30, 2024 increased 1.4% or $1.07 per Bbl of oil and decreased 28.9% or $0.77 per Mcf of natural gas as compared to the nine months ended September 30, 2023. This change is consistent with prices experienced in the market, specifically when compared to the EIA average price increase of 1.7% or $1.31 per Bbl of oil and decrease of 14.2% or $0.35 per Mcf of natural gas for the comparable periods.
Lease Bonus and Other Income
Lease bonus and other income for the nine months ended September 30, 2024 was $4.3 million, a decrease of $0.7 million from $5.0 million for the nine months ended September 30, 2023. The decrease in lease bonus and other income was primarily related to legal settlements received during the nine months ended September 30, 2023.
Gain on Commodity Derivative Instruments
Gain on commodity derivative instruments for the nine months ended September 30, 2024 included $5.5 million of mark-to-market losses and $8.3 million of gains on the settlement of commodity derivative instruments compared to $11.0 million of mark-to-market gains and $4.8 million of losses on the settlement of commodity derivative instruments for the nine months ended September 30, 2023. We recorded a mark-to-market loss for the nine months ended September 30, 2024 as a result of the increase in oil and natural gas strip pricing from the year ended December 31, 2023, offset by