Oil, natural gas and natural gas liquids revenues were $101.3 million and $64.1 million for the three months ended June 30, 2022 and 2021, respectively. The increase in revenues is primarily attributable to an approximate $28.75 per Boe increase in our average realized prices (excluding the effects of hedging arrangements). The amount we realize for our production depends predominantly upon commodity prices, which are affected by changes in market demand and supply, as impacted by overall economic activity, weather, transportation take-away capacity constraints, inventory storage levels, quality of production, basis differentials and other factors. For the three months ended June 30, 2022 and 2021, production averaged 15,044 Boe/d and 15,571 Boe/d, respectively.
Lease operating expenses were $11.9 million and $10.2 million for the three months ended June 30, 2022 and 2021, respectively. On a per unit basis, lease operating expenses were $8.70 per Boe and $7.18 per Boe for the three months ended June 30, 2022 and 2021, respectively. The increase in lease operating expenses in 2022 results primarily from a market increase in maintenance, power, and chemical costs..
Workover and other expenses were $1.4 million and $0.8 million for the three months ended June 30, 2022 and 2021, respectively. On a per unit basis, workover and other expenses were $1.01 per Boe and $0.54 per Boe for the three months ended June 30, 2022 and 2021, respectively. The increased workover and other expenses in 2022 relate to more significant workover projects undertaken in the current period.
Taxes other than income were $5.4 million and $2.9 million for the three months ended June 30, 2022 and 2021, respectively. Most production taxes are based on realized prices at the wellhead. As revenues or volumes from oil and natural gas sales increase or decrease, production taxes on these sales also increase or decrease. On a per unit basis, taxes other than income were $3.92 per Boe and $2.06 per Boe for the three months ended June 30, 2022 and 2021, respectively.
Gathering and other expenses were $15.9 million and $14.3 million for the three months ended June 30, 2022 and 2021, respectively. Gathering and other expenses include gathering fees paid to third parties on our oil and natural gas production and operating expenses of our gathering support infrastructure. Approximately $6.8 million and $4.6 million for the three months ended June 30, 2022 and 2021, respectively, relate to gathering and marketing fees paid to third parties on our oil and natural gas production. Gathering and marketing fees increased in 2022 as we marketed higher quantities of sour gas production to third parties in the current year period. Approximately $9.1 million and $9.7 million for the three months ended June 30, 2022 and 2021, respectively, relate to operating expenses on our treating equipment and gathering support facilities. The decrease in treating equipment and gathering support facilities expenses in 2022 results from lower operating expenses associated with our treating equipment.
General and administrative expense was $4.1 million and $3.5 million for the three months ended June 30, 2022 and 2021, respectively. The increase in general and administrative expense in the current period is primarily associated with an increase in professional fees partially offset by a decrease in corporate office lease expense, payroll and benefits costs. On a per unit basis, general and administrative expenses were $3.01 per Boe and $2.50 per Boe for the three months ended June 30, 2022 and 2021, respectively.
Depletion for oil and natural gas properties is calculated using the unit of production method, which depletes the capitalized costs of evaluated properties plus future development costs based on the ratio of production for the current period to total reserve volumes of evaluated properties as of the beginning of the period. Depletion expense was $12.4 million and $11.0 million for the three months ended June 30, 2022 and 2021, respectively. On a per unit basis, depletion expense was $9.07 per Boe and $7.77 per Boe for the three months ended June 30, 2022 and 2021, respectively. The increase in our depletion rate for the quarter ended June 30, 2022 compared to the same period in 2021 is primarily due to increased future development costs in 2022 compared to 2021 associated with PUD reserve additions during the periods
We enter into derivative commodity instruments to hedge our exposure to price fluctuations on our anticipated oil, natural gas and natural gas liquids production. Consistent with prior years, we have elected not to designate any positions as cash flow hedges for accounting purposes, and accordingly, we recorded the net change in the mark-to-market value of these derivative contracts in the unaudited condensed consolidated statements of operations. At June 30, 2022, we had a $10.1 million derivative asset, $6.1 million of which was classified as current, and we had a $149.9 million derivative liability, $91.8 million of which was classified as current. We recorded a net derivative loss of $31.9