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Supplemental Gas Data (unaudited) (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
Extractive Industries [Abstract] |
Capitalized Costs Relating to Oil and Gas Producing Activities Disclosure | Capitalized Costs:
| As of December 31,
| 2019 |  | 2018
Intangible Drilling Costs | $ | 4,688,497 |  |  | $ | 4,120,283 |
Proved Gas Properties | 1,208,046 |  |  | 1,135,411 |
Gas Gathering Assets | 1,110,977 |  |  | 1,099,047 |
Unproved Gas Properties | 755,590 |  |  | 927,667 |
Gas Wells and Related Equipment | 1,042,000 |  |  | 856,973 |
Other Gas Assets | 73,479 |  |  | 54,395 |
Total Property, Plant and Equipment | $ | 8,878,589 |  |  | $ | 8,193,776 |
Accumulated Depreciation, Depletion and Amortization | (3,263,221 | ) |  | (2,475,917 | )
Net Capitalized Costs | $ | 5,615,368 |  |  | $ | 5,717,859 |
Cost Incurred in Oil and Gas Property Acquisition, Exploration, and Development Activities Disclosure | Costs incurred for property acquisition, exploration and development (*):
| For the Years Ended December 31,
| 2019 |  | 2018 |  | 2017
Property Acquisitions: |  |  |  |  |
Proved Properties | $ | 36,710 |  |  | $ | 38,621 |  |  | $ | 15,850 |
Unproved Properties | 24,760 |  |  | 36,248 |  |  | 32,038 |
Development | 739,874 |  |  | 844,081 |  |  | 544,809 |
Exploration | 79,855 |  |  | 61,604 |  |  | 48,020 |
Total | $ | 881,199 |  |  | $ | 980,554 |  |  | $ | 640,717 |
__________ (*) Includes costs incurred whether capitalized or expensed.
Results of Operations for Oil and Gas Producing Activities Disclosure | Results of Operations for Producing Activities:
| For the Years Ended December 31,
| 2019 |  | 2018 |  | 2017
Natural Gas, NGLs and Oil Revenue | $ | 1,364,325 |  |  | $ | 1,577,937 |  |  | $ | 1,125,224 |
Gain (Loss) on Commodity Derivative Instruments | 376,105 |  |  | (30,212 | ) |  | 206,930 |
Purchased Gas Revenue | 94,027 |  |  | 65,986 |  |  | 53,795 |
Total Revenue | 1,834,457 |  |  | 1,613,711 |  |  | 1,385,949 |
Lease Operating Expense | 65,443 |  |  | 95,139 |  |  | 88,932 |
Production, Ad Valorem, and Other Fees | 27,461 |  |  | 32,750 |  |  | 29,267 |
Transportation, Gathering and Compression | 516,879 |  |  | 424,206 |  |  | 382,865 |
Purchased Gas Costs | 90,553 |  |  | 64,817 |  |  | 52,597 |
Impairment of Exploration and Production Properties | 327,400 |  |  | — |  |  | 137,865 |
Impairment of Undeveloped Properties | 119,429 |  |  | — |  |  | — |
Exploration Costs | 44,380 |  |  | 12,033 |  |  | 48,074 |
Depreciation, Depletion and Amortization | 474,352 |  |  | 461,149 |  |  | 412,036 |
Total Costs | 1,665,897 |  |  | 1,090,094 |  |  | 1,151,636 |
Pre-tax Operating Income | 168,560 |  |  | 523,617 |  |  | 234,313 |
Income Tax Expense (Benefit) | 78,398 |  |  | 102,629 |  |  | (348,676 | )
Results of Operations for Producing Activities excluding Corporate and Interest Costs | $ | 90,162 |  |  | $ | 420,988 |  |  | $ | 582,989 |
Oil and Gas Net Production, Average Sales Price and Average Production Costs Disclosure | The following is production, average sales price and average production costs, excluding ad valorem and severance taxes, per unit of production:
| For the Years Ended December 31,
| 2019 |  | 2018 |  | 2017
Production (MMcfe) | 539,149 |  |  | 507,104 |  |  | 407,166 |
Total Average Sales Price Before Effects of Commodity Derivative Financial Settlements (per Mcfe) | $ | 2.53 |  |  | $ | 3.11 |  |  | $ | 2.76 |
Average Effects of Commodity Derivative Financial Settlements (per Mcfe) | $ | 0.14 |  |  | $ | (0.15 | ) |  | $ | (0.11 | )
Total Average Sales Price Including Effects of Commodity Derivative Financial Settlements (per Mcfe) | $ | 2.66 |  |  | $ | 2.97 |  |  | $ | 2.66 |
Average Lifting Costs, Excluding Ad Valorem and Severance Taxes (per Mcfe) | $ | 0.12 |  |  | $ | 0.19 |  |  | $ | 0.22 |
Schedule of Gas and Oil Acreage | The following table sets forth, at December 31, 2019, the number of producing wells, developed acreage and undeveloped acreage:
|  | Gross |  | Net(1)
Producing Gas Wells (including Gob Wells) |  | 6,512 |  |  | 4,510 |
Producing Oil Wells |  | 151 |  |  | — |
Acreage Position: |  |  |  |
Proved Developed Acreage |  | 337,700 |  |  | 337,700 |
Proved Undeveloped Acreage |  | 28,916 |  |  | 28,916 |
Unproved Acreage |  | 5,192,777 |  |  | 3,868,533 |
Total Acreage |  | 5,559,393 |  |  | 4,235,149 |
____________ (1) Net acres include acreage attributable to the Company's working interests of the properties. Additional adjustments (either increases or decreases) may be required as the Company further develops title to and further confirms its rights with respect to its various properties in anticipation of development. The Company believes that its assumptions and methodology in this regard are reasonable.
Schedule of Proved Developed and Undeveloped Oil and Gas Reserve Quantities | The gas reserves estimates are as follows:
|  |  |  |  |  | Condensate |  | Consolidated
|  | Natural Gas |  | NGLs |  | & Crude Oil |  | Operations
|  | (MMcf) |  | (Mbbls) |  | (Mbbls) |  | (MMcfe)
Balance December 31, 2016 (a) |  | 5,828,399 |  |  | 60,532 |  |  | 10,009 |  |  | 6,251,648 |
Revisions (b) |  | (202,735 | ) |  | 1,162 |  |  | (5,834 | ) |  | (232,321 | )
Price Changes |  | 173,738 |  |  | 1,188 |  |  | (159 | ) |  | 181,470 |
Extensions and Discoveries (c) |  | 1,769,029 |  |  | 17,887 |  |  | 1,800 |  |  | 1,887,153 |
Production |  | (364,893 | ) |  | (6,456 | ) |  | (589 | ) |  | (407,166 | )
Sales of Reserves In-Place |  | (81,780 | ) |  | (2,622 | ) |  | (277 | ) |  | (99,172 | )
Balance December 31, 2017 (a) |  | 7,121,758 |  |  | 71,691 |  |  | 4,950 |  |  | 7,581,612 |
Revisions (d) |  | 313,091 |  |  | 441 |  |  | 865 |  |  | 320,925 |
Price Changes |  | 28,100 |  |  | 32 |  |  | 4 |  |  | 28,315 |
Extensions and Discoveries (c) |  | 839,268 |  |  | 16,247 |  |  | 4,010 |  |  | 960,808 |
Production |  | (468,228 | ) |  | (6,011 | ) |  | (468 | ) |  | (507,104 | )
Purchases of Reserves In-Place |  | 317,437 |  |  | 756 |  |  | — |  |  | 321,975 |
Sales of Reserves In-Place (e) |  | (715,088 | ) |  | (17,252 | ) |  | (1,100 | ) |  | (825,196 | )
Balance December 31, 2018 (a) |  | 7,436,338 |  |  | 65,904 |  |  | 8,261 |  |  | 7,881,335 |
Revisions (f) |  | (521,617 | ) |  | 5,926 |  |  | (5,418 | ) |  | (518,570 | )
Price Changes |  | (40,773 | ) |  | (740 | ) |  | (5 | ) |  | (45,246 | )
Extensions and Discoveries (c) |  | 1,569,813 |  |  | 10,182 |  |  | 2,732 |  |  | 1,647,297 |
Production |  | (505,355 | ) |  | (5,428 | ) |  | (204 | ) |  | (539,149 | )
Balance December 31, 2019 (a) |  | 7,938,406 |  |  | 75,844 |  |  | 5,366 |  |  | 8,425,667 |
Proved developed reserves: |  |  |  |  |  |  |  |
December 31, 2017 |  | 4,051,526 |  |  | 56,022,000 |  |  | 3,567,000 |  |  | 4,409,065 |
December 31, 2018 |  | 4,242,579 |  |  | 40,180,000 |  |  | 1,870,000 |  |  | 4,494,878 |
December 31, 2019 |  | 4,473,534 |  |  | 59,800,000 |  |  | 1,087,000 |  |  | 4,838,858 |
Proved undeveloped reserves: |  |  |  |  |  |  |  |
December 31, 2017 |  | 3,070,232 |  |  | 15,669,000 |  |  | 1,383,000 |  |  | 3,172,547 |
December 31, 2018 |  | 3,193,759 |  |  | 25,724,000 |  |  | 6,391,000 |  |  | 3,386,457 |
December 31, 2019 |  | 3,464,873 |  |  | 16,044,000 |  |  | 4,278,000 |  |  | 3,586,809 |
__________
(a) | Proved developed and proved undeveloped gas reserves are defined by SEC Rule 4.10(a) of Regulation S-X. Generally, these reserves would be commercially recovered under current economic conditions, operating methods and government regulations. CNX cautions that there are many inherent uncertainties in estimating proved reserve quantities, projecting future production rates and timing of development expenditures. Proved oil and gas reserves are estimated quantities of natural gas which geological and engineering data demonstrate with reasonable certainty to be recoverable in future years from known reservoirs under existing economic and operating conditions and government regulations. Proved developed reserves are reserves expected to be recovered through existing wells, with existing equipment and operating methods.
(b) | The downward revisions for 2017 are due to corporate planning changes by our JV partner in Ohio Utica which resulted in all PUD's being removed, causing a 458 Bcfe downward revision, offset, in part, by improved well performance due to the enhanced RCS completions and improved operating costs.
(c) | Extensions and Discoveries in 2017, 2018, and 2019 are due to the addition of wells on the Company's Marcellus and Utica Shale acreage more than one offset location away with continued use of reliable technology.
(d) | The upward revision for 2018 of 321 Bcfe is primarily due to a 472 Bcfe upward revision from increased performance through our continued focus on optimization. This is partially offset by a 151 Bcfe downward revision due to plan changes.
(e) | The sales of reserves in-place is related to the divestiture of our Utica JV assets and substantially all of our conventional properties. Refer to Note 6 - Acquisitions and Dispositions for more information.
(f) | The downward revisions in 2019 are primarily due to removal of 872 Bcfe in reserves from plan changes which are the result of our continued focus on optimization and high grading initiatives. There was additionally a reduction of 304 Bcfe related to removal of proved undeveloped locations removed from our plans due to the SEC five-year development rule.
These downward revisions were partially offset by efficiencies in operations and optimization which increased reserves by 657 Bcfe.
|  | For the Year
|  | Ended
|  | December 31,
|  | 2019
Proved Undeveloped Reserves (MMcfe) |  |
Beginning Proved Undeveloped Reserves |  | 3,386,457 |
Undeveloped Reserves Transferred to Developed (a) |  | (752,970 | )
Revisions Due to 5 Year Rule |  | (303,787 | )
Price Revisions |  | 2,147 |
Revisions Due to Plan Changes (b) |  | (872,495 | )
Revisions Due to Changes Due to Well Performance (c) |  | 556,881 |
Extension and Discoveries (d) |  | 1,570,576 |
Ending Proved Undeveloped Reserves(e) |  | 3,586,809 |
_________
(a) | During 2019, various exploration and development drilling and evaluations were completed. Approximately, $334,062 of capital was spent in the year ended December 31, 2019 related to undeveloped reserves that were transferred to developed.
(b) The downward revisions for 2019 plan changes is due to removal of a portion of our Marcellus and Utica locations from our proved undeveloped reserves.
(c) | The upward revisions due to well performance is due to results from Marcellus Shale production.
(d) | Extensions and discoveries are due mainly to the addition of wells on our Marcellus and Utica Shale acreage more than one offset location away with continued use of reliable technology.
(e) Included in proved undeveloped reserves at December 31,2019 are approximately 248,570 MMcfe of reserves that have been reported for more than five years. These reserves specifically relate to GOB (a rubble zone formed in the cavity created by the extraction of coal) production due to a complex fracture being generated in the overburden strata above the mined seam. Mining operations take a significant amount of time and our GOB forecasts are consistent with the future plans of the Buchanan Mine that was sold in March 2016 to Coronado IV LLC with the rights to this gas being retained by the Company. Evidence also exists that supports the continual operation of the mine beyond the current plan, unless there was an extreme circumstance resulting from an external factor. These reasons constitute the specific circumstances that exist to continue recognizing these reserves for CNX.
Schedule of Aging of Capitalized Exploratory Well Costs | The following table represents the capitalized exploratory well cost activity as indicated:
| December 31,
| 2019 |  | 2018 |  | 2017
Costs reclassified to wells, equipment and facilities based on the determination of proved reserves | $ | 59,981 |  |  | $ | 46,614 |  |  | $ | 40,149 |
Costs expensed due to determination of dry hole or abandonment of project | $ | — |  |  | $ | 809 |  |  | $ | — |
Standardized Measure of Discounted Future Cash Flows Relating to Proved Reserves Disclosure | The standardized measure is intended to provide a better means for comparing the value of CNX proved reserves at a given time with those of other gas producing companies than is provided by a comparison of raw proved reserve quantities.
|  | December 31,
|  | 2019 |  | 2018 |  | 2017
Future Cash Flows (a) |  |  |  |  |  |
Revenues |  | $ | 19,489,588 |  |  | $ | 26,610,100 |  |  | $ | 19,261,578 |
Production Costs |  | (7,903,120 | ) |  | (7,730,451 | ) |  | (7,234,303 | )
Development Costs |  | (1,121,073 | ) |  | (1,600,128 | ) |  | (1,710,585 | )
Income Tax Expense |  | (2,720,994 | ) |  | (4,147,075 | ) |  | (2,475,981 | )
Future Net Cash Flows |  | 7,744,401 |  |  | 13,132,446 |  |  | 7,840,709 |
Discounted to Present Value at a 10% Annual Rate |  | (4,673,932 | ) |  | (8,476,989 | ) |  | (4,709,311 | )
Total Standardized Measure of Discounted Net Cash Flows |  | $ | 3,070,469 |  |  | $ | 4,655,457 |  |  | $ | 3,131,398 |
(a) | For 2019, the reserves were computed using unweighted arithmetic averages of the closing prices on the first day of each month during 2019, adjusted for energy content and a regional price differential. For 2019, this adjusted natural gas price was $2.24 per Mcf, the adjusted oil price was $44.31 per barrel and the adjusted NGL price was $19.10 per barrel.
For 2018, the reserves were computed using unweighted arithmetic averages of the closing prices on the first day of each month during 2018, adjusted for energy content and a regional price differential. For 2018, this adjusted natural gas price was $3.28 per Mcf, the adjusted oil price was $51.68 per barrel and the adjusted NGL price was $27.58 per barrel. For 2017, the reserves were computed using unweighted arithmetic averages of the closing prices on the first day of each month during 2017, adjusted for energy content and a regional price differential. For 2017, this adjusted natural gas price was $2.44 per Mcf, the adjusted oil price was $38.65 per barrel and the adjusted NGL price was $23.61 per barrel. The following are the principal sources of change in the standardized measure of discounted future net cash flows for consolidated operations during:
| December 31,
| 2019 |  | 2018 |  | 2017
Balance at Beginning of Period | $ | 4,655,457 |  |  | $ | 3,131,398 |  |  | $ | 955,117 |
Net Changes in Sales Prices and Production Costs | (2,826,725 | ) |  | 1,732,229 |  |  | 1,983,475 |
Sales Net of Production Costs | (1,130,685 | ) |  | (995,630 | ) |  | (831,131 | )
Net Change Due to Revisions in Quantity Estimates | (252,796 | ) |  | 307,030 |  |  | (145,496 | )
Net Change Due to Extensions, Discoveries and Improved Recovery | 654,027 |  |  | 534,052 |  |  | 588,574 |
Development Costs Incurred During the Period | 739,874 |  |  | 844,081 |  |  | 544,809 |
Difference in Previously Estimated Development Costs Compared to Actual Costs Incurred During the Period | (323,922 | ) |  | (434,817 | ) |  | (129,427 | )
Purchase of Reserves In-Place | — |  |  | 209,630 |  |  | — |
Sales of Reserves In-Place | — |  |  | (434,103 | ) |  | (55,277 | )
Changes in Estimated Future Development Costs | (24,469 | ) |  | (49,294 | ) |  | (233,017 | )
Net Change in Future Income Taxes | 409,797 |  |  | (507,410 | ) |  | (404,582 | )
Timing and Other | 586,591 |  |  | (69,087 | ) |  | 712,764 |
Accretion | 583,320 |  |  | 387,378 |  |  | 145,589 |
Total Discounted Cash Flow at End of Period | $ | 3,070,469 |  |  | $ | 4,655,457 |  |  | $ | 3,131,398 |

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- Definition Tabular disclosure of the amount of exploratory well costs that have been capitalized after the completion of drilling and the number of projects for which those costs relate. Additionally, for exploratory well costs that have been capitalized for periods greater than one year at the most recent balance sheet date, this block of text may be used to disclose an aging of those amounts by year, or by using a range of years, and the number of projects to which those costs relate. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 1B -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68064819&loc=SL6806780-109447 + Details
Name: | us-gaap_ScheduleOfAgingOfCapitalizedExploratoryWellCostsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration