Annual report pursuant to Section 13 and 15(d)

Supplemental Oil and Gas Reserve Information (Unaudited) - Schedule of Estimated Quantities of Proved Reserves (Details)

v3.19.1
Supplemental Oil and Gas Reserve Information (Unaudited) - Schedule of Estimated Quantities of Proved Reserves (Details)
12 Months Ended
Dec. 31, 2018
MMBbls
Mcf
Dec. 31, 2017
MMBbls
Mcf
Crude Oil [Member]    
TOTAL PROVED RESERVES, Beginning of year | MMBbls 4,174
Purchases of minerals in place | MMBbls 1,622
Sales of minerals in place | MMBbls
Extensions and discoveries | MMBbls 4,174
Revisions of previous estimates | MMBbls 161 (1,620)
Production | MMBbls (764)
TOTAL PROVED RESERVES, End of period | MMBbls 4,334 4,174
Proved developed producing | MMBbls
Proved developed nonproducing | MMBbls
PROVED DEVELOPED RESERVES, End of period | MMBbls
Total proved undeveloped | MMBbls 4,334 4,174
Natural Gas [Member]    
TOTAL PROVED RESERVES, Beginning of year | Mcf 8,353
Purchases of minerals in place | Mcf 811
Sales of minerals in place | Mcf
Extensions and discoveries | Mcf 8,353
Revisions of previous estimates | Mcf 2,099 (811)
Production | Mcf (870)
TOTAL PROVED RESERVES, End of period | Mcf 9,582 8,353
Proved developed producing | Mcf
Proved developed nonproducing | Mcf
PROVED DEVELOPED RESERVES, End of period | Mcf
Total proved undeveloped | Mcf 9,582 8,353